It occludes dentinal tubules, helping reduce dentin hypersensitivity. It's a tooth-desensitizing agent helping people who are for example, very sensitive to very cold/hot temperature in their mouth.
There is evidence that it can foster enamel/dentin mineral gain, but head to head studies shows that it's comparable to regular fluoride toothpaste and not superior. E.g. In a randomized in-situ trial (Caries Research, 2017), adding 5% NovaMin to a 927-ppm SMFP toothpaste did not improve remineralization outcomes vs the same fluoride formula without NovaMin.
Also, you can find NovaMin in the US (e.g., NUPRO Sensodyne Prophylaxis Paste with NovaMin).
I don't know if this is everyone's experience, but you get a distinct feeling of smoothness after using it, unlike any other toothpaste. Since NovaMin reacts with saliva to remineralize the tooth you'd imagine it's a stronger bond than directly filling up crevices with nanohydroxyapatite, and studies seem to [slightly] confirm that.
anecdotal experience: my wife had somewhat botched dental filling proceedure. it probably damaged her teeth in some way and it became very sensitive for any fluids or foods. they tried to redo it, but it only increased sensitivity further.
i gave her apagard renamel (with nanohydroxyapatite ). after a few days sensitivity went down and after a few weeks it completely disappeared
Mine says "NovaMin" right on the front. There are multiple types of Sensodyne.
Btw, what really drives me crazy is that Elmex sells multiple different sorts of tooth paste with the colors green and violett, each. How can a company confuse their customers so much that they buy a tooth whitener paste instead of a remineralizing one? Did the mistake twice...
The toothpaste maker wants to claim something like "Novamin is useful". In the EU this is treated as for cosmetics, so relatively low bar to clear. In the US this is treated as pharmaceutical, so a high bar to clear. The manufacturer has decided that passing that bar is not financially sensible for them.
hydroxyapatite is a mineral like your tooth, that's how it supports remineralization.
It's actually great stuff and works wonders for tooth sensitivity above and beyond fluoride shellac. I also order it from the more civilized world.
BioMin is available in the US and is similar, but I don't find it works better and I don't like that it doesn't have fluoride. (I live in an area without fluoride in the water)
I used BioMin F for about a year, and I think it did something, but I'm not sure I'm qualified to evaluate its effectiveness.
Unfortunately it isn't actually available where I live (US), and I had to buy it from Canada... from a shop that hasn't had stock for more than a year now. I've tried ordering from other countries, but haven't found anyone else who will ship to the US.
I've tried the "BioMin Restore" toothpaste that is available in the US, and I don't feel like it's doing much of anything, but... again, not sure I'm qualified to evaluate.
If you have sensitive teeth both nHAP and novamin toothpastes help a lot there. I've tried both. nHAP is easier to get in the USA, there are several brands, for some reason some go nuts over the imported ones from Japan.
If you're going to use nHAP, get Apaguard from Japan. Their nHAP is rod shaped, not jagged. They were the first to make rod shaped nHAP and have been doing it for decades. It's not a great idea to introduce cheap/jagged nHAP into your mouth. Sharp nanoparticles tend to cause cancer.
Interesting. A very rudimentary web search begins suggesting that Biomin is the more suspicious of the two. It has a very weird Internet footprint of being this somewhat obscure-looking expensive "Health" product. I really can't find any recognizable sources on the product name. Maybe the obscurity is part of the exotic allure for some?
I used to use sensodyne for cold-sensitive teeth, but they changed ingredients to include something I’m now allergic to. Or I recently developed an allergy to whatever their unchanged ingredients are.
nanohydroxyapatite helps a lot with sensitive teeth, you can even find some brands that also have fluoride in it if you're worried about the nonfluroide versions
I'm not sure what the takeaway is here? If I read that correctly, they only found one study and just reported their results? Is that because there are literally no studies on this worldwide? I find that very hard to believe.
A systematic review like this can be helpful, in that it identifies where there are gaps in the literature, and prevents hype - if some studies show evidence of effect, and others do not, even if there are only a few published studies then we know somthing new about the totality of the literature on the subject.
That said, this particular systematic review has a couple of issues (e.g. I can't find the precise inclusion / exclusion criteria, nor can I find that it has been pre-registered on Prospero or another database).
I have written a few systematic reviews where there is very little data already availabe, and we use them to explain to funders why we need to do further research on a given topic.
I know there's value to recording the selection process and all that but it's a little funny to have a review that ends up only including one study: at that point just give me a link, not a paper.
You can buy the supplies and make nano silver flouride now, relatively cheaply compared to dental work. If you have a non corporate dentist, you could even ask them to apply it. The basic mechanism has been used on teeth forever, and adding the nano particles prevents the chemical from permanently staining your teeth black or blue (which is why it hasnt ever been more popular to begin with.)
I found other sites indicating it's entering trials soon to be on the market next year. That's still a bit speculative obviously, but it sounds more promising that just being a working theory.
Hey @dang (I know it doesn't work, but isn't it fun to use your imagination?), can we get this press release replaced by a link to the actual paper [0]? This one is even open-access!
I have replaced my sensodyne with mirasensitive hap+. It is more expensive, even more so than sensodyne. However it has helped incredibly with my exposed roots which used to be very sensitive. Now they are less sensitive than they used to be with sensodyne. I can swish cold water and eat sour foods again.
My current routine is roughly brush_teeth(toothpaste={mirasensitive, random_cheap_toothpaste}[day%2]) as you don't need to apply HAP every single day.
I find that I still have to be careful eating apples and lemons straight up. To protect myself I thoroughly swish and rinse water a few times shortly after consuming these fruits. If I don't do that, my teeth get extremely sensitive and it takes a few days for the hap to repair it again.
For the uninitiated, Theodent is a $100/tube toothpaste made with the chocolate extract theobromine, instead of fluoride, based on a similar paper quite a while back.
I feel like I've been reading this exact same article for the last 15 years.. I find it very difficulty to parse what is real and what is vaporware in the medical breakthroughs community.
Just 7% of studies that do a preliminary study on humans actually get through phase 3 and get approved for use. This is before even the preliminary point, its a tooth (or even a tooth analogue) in a petri dish. No idea if the material will be safe in a human mouth yet.
There is a lot of hyping of results in medicine papers in general but its not really their fault. The entire academic world is being forced to publish or die as governments look to measure results from the science they instead get what is measured and everyone has to embellish the importance of what they found and always find positive results.
Despite how obtuse the current administration views are, this has been true for decades. The churn of new papers and hype around medicine/biotech is nothing new.
Says nothing about endemic reproducibility crisis of the social sciences.
Since student loans have been basically guaranteed (bankruptcies can’t erase student loan obligations, in an attempt to push rates lower) and tuition steeply rose, academic institutions’ ratio of administrators to students has skyrocketed to a bureaucratic mess, leading to a flywheel of higher education costs and incentivizing research for money’s sake over impact to the field.
Real impact would be reproducing notoriously iffy studies, but that doesn’t bring in the dollars.
> The entire academic world is being forced to publish or die as governments look to measure results from the science they instead get what is measured and everyone has to embellish the importance of what they found and always find positive results.
It sounds like they're running it like a business.
A lot of this is the direct result of trying to run a government like a business. If we instead left some things that are unprofitable but important to government then we'd probably get better results than having businesses do those things expecting a profit. This was the model in the 30's, 40's and 50's that led to the "golden age" that people are now trying to recapture.
You're describe an age where the government was a wash with surplus dollars. Secondly, most of these research institutions run as non-profits that effectively just cover costs (but run a large hedge fund as a side business)
The escalation in costs have come from:
- Incentives around US News College rankings (and the amenities that drive the rankings)
- Administrative (non-teaching, non-research) bloat
Research is definitely in need of reform though, but not sure these outcomes are actually causal or even corrilated.
The golden age people are trying to recapture is the aftermath of a world war that decimated almost every major power except the US and then the US happily rebuilt everyone’s economies in exchange for riches and power. The 21st century looks very different and only really MAGA folks are looking to rewind the clock as a way to move forward.
The economic theory of MAGA, is that the united states yes rebuilt the world but also exported the US consumer economy through asymmetric nonreciprocal tariffs. Rebuilding countries made money by selling to the US consumer, not the other way around.
You can argue that it's overall bad for the economy, but I think you're missing the arguement.
The 1940s you get for free, what with the war and all nothing was ever going to be very tolerable. But what about the 1930s is a "golden age" in your opinion? What exactly is it from that era that you wish we had more of?
> This eventually leads to competitors taking over and those business failing
If only that fairytale were true. In the real world bloated inefficient companies bribe government, install themselves into government agencies directly (regulatory capture), and hire lobbyists to write laws which protect them from pesky upstarts through unchecked anti-competitive practices and anti-consumer regulation allowing them to stay wealthy and in power forever while killing off innovation and progress.
...which I suppose is why IBM is still the industry leader in computing, while Ford, GM, and Chrysler can't be competed with. Photographers always use Kodak film, and we all talk on our Nokia cell phones. We all shop at Sears, and fly on Pan Am.
I never claimed that companies can't fail or change, only that bloat and inefficiencies aren't a death sentence. Even several of your examples are still alive and well and it's telling that their major declines took place in the 1980s and 1990s. Companies have gotten a lot better at abusing government and law to protect their profits over the last 40 years.
You could follow the NIH news feed that contains some of what gets funded but its actually quite difficult given the various institutions all over the world that all fund studies including charities and the universities themselves. On an individual topic with time you could learn who most of the major players are and follow their news but its unique to every topic.
The potentially easier way at least to get a lay of the land is to follow pubmed (https://pubmed.ncbi.nlm.nih.gov/) for the topic you are interested in, if you then look into those papers you will find funding statements as well as the place the research was conducted and use both to build up a picture of the origins of research in a field.
Afraid I don't know of an easier way not a generic one anyway. Sometimes you just have to follow the right person on twitter who announces trials or studies or be at the right conference. Start with pubmed and the output papers and that will get you started. Then also have a search on the NIH and that might lead you to some links to groups and institutions they fund.
Publish or perish is more about status & careerism within academia than any sort of govt forcing function. If you don't publish, you are invisible to your peers and your career stagnates, regardless of the govt funding environment.
It is entirely their fault. If no one agrees to do performative research, the problem will be solved.
The problem is some people prefer an academic lifestyle in exchange for doing performative research.
Yes there are other actors eg politicians demanding performative productivity, but mostly it’s the inmates running the asylum.
Academia is one failed western institution amongst many, and those failures are ultimately directed by the actions of the individuals that comprise those institutions.
> It is entirely their fault. If no one agrees to do performative research, the problem will be solved.
Right, and the prisoner's "dilemma" isn't a real thing; everyone knows it's their own fault for not just all picking the decision that gives them all the best outcome. Every individual within a network effect is obviously responsible for the outcomes the entire system produces.
KPIism is the death knell of modern society. In the 90s and 2000s this mantra of "measure and improve" took hold like a virus. It is in all instances I observe a rats race where everybody just starts to look for the cheat-codes instead of "doing-the-right-thing".
Arguably America is the pinnacle of this right now, where (many) politicians and (many) business leaders now feel justified do whatever's legal just to score points. I would argue this type of thinking was birthed in the UK though under Thatcher who as a first step removed the general trust in (civil servants in her case) your fellow human beings. Blair then came up to replace that trust with KPIs.
We need to get back to a world where we trust people to do the right thing - without measuring their success in short-term KPIs.
MBAs are the source of KPIism. We have spent many decades minting them at scale in the USA and now the chickens are roosting. Anything can be ruined by pursuit of KPIs at all costs. The model is to optimize a particular KPI, get your bonus, use this story to get your next job at +$X, leave, repeat. The longer story of the company does not matter, you shipped and got paid, even if the village burned down after you left.
Same feeling here. Dental seems particularly fraught (though maybe I just pay more attention to it out of interest). I know the cycle time between press releases/hype and actual application can be the better part of a decade, so I assume that's coloring my perception too.
re: dental in particular - It seems like enamel regeneration and stem-cell-based tooth replacement have both been in the news year-after-year without applications actually coming to market.
Does anyone know why casein phosphopeptide (Recaldent) hasn't had more success?
https://pubmed.ncbi.nlm.nih.gov/9294493/
You can buy the Japanese gum with Recaldent online, but I expected it to be in the gum display in retail shops by now.
Everyone knows that teeth are luxury bones in the US. The market just isn't there for fancy treatments. The ultra-wealthy just get their teeth replaced with perfect veneers anyway.
Really? This sounds more like someone's plan to get grants to research stem cells than someone's plan to repair (or replace) teeth.
We already have a natural ability to grow new teeth that replace existing ones. Everybody does it... once. Where's the research into getting it to happen again?
Theet formation is a very early procces, even before the baby is born.
> Primary (baby) teeth start to form between the sixth and eighth week of prenatal development, and permanent teeth begin to form in the twentieth week.
There has been a ton of research in the area of re-growing teeth from stem cells. A cursory search-engining will turn up a ton of articles, some going back decades, and many giving the impression that it's close to happening. I've been following it for awhile because I knew I'd be in the market for a new tooth eventually.
There have been a lot of research around USAG-1, too [1]:
> Uterine sensitization-associated gene-1 (USAG-1) deficiency leads to enhanced bone morphogenetic protein (BMP) signaling, leading to supernumerary teeth formation.
A similar approach was reported in 2019,[1] but that produced thinner coatings, and the recovery of the architecture of inner layers of enamel was only partial.
While I 100% agree with what you wrote, I'd just add that it does seem in my own dental visits over my lifetime that there have been real advancements, too. But yes, I agree, hard for non-expert to parse.
Seeing SLA 3D printers at my dentist's office was pretty cool. Apparently they use them for a variety of fixturing and jigs, and have a workflow that includes a handheld scanning unit that SLAMs to generate a solid model of the patient's teeth.
I have 4 crowns, 2 done using moulds, 2 using the 3d scanner. Same doc, same office. The moulded ones were ok with some adjustments, but the 3d scanned ones were perfect since day 1. I'm happy with the progress in dentistry.
I'm surprised how many low-hanging fruit issues are still not solved. So many dentists use cold or tap water for their rinse sprayer despite the fact that many people have temperature sensitivity issues with their teeth. Having lukewarm water would be trivial but I've yet to go to an American dentist that does it.
A better approach is to monitor FDA updates. When an FDA trial shows positive results for a new treatment and approval for public use appears imminent, that would qualify as news in that regard.
ART with HVGIC has basically solved dental caries since the 80s. But you aren't likely to get it in the US or most western nations because there is a massive industry around drilling and filling with resins and then solving the multitude of problems that such a destructive process creates. Crowns, root canal, periodontal disease etc.
I would say, maybe look at medical studies from the opposite end, epidemiological studies look at factors that reduce mortality/morbidity. Granted, it's less flashy, basically vaccines, alcohol/tobacco reduction, increase in active lifestyle, statins/ace inhibitors, monoclonals/oncology fanciness. although someone who actually is an MPH can probably correct me.
on the neuroscience side, off the top of my head, the most impactful things have been better anticoagulants and preventive care for stroke, monoclonal abs for autoimmune diseases like MS/myasthenia, , certain stereotactic brain surgeries, and such. But considering what ails most people, the overall population effect probably is minuscule compared to say better crash safety in automobiles.
Cancers have had extremely effective new treatments developed for in the last ten years.
Depending on the type of cancer, we now have cures or treatments that stave off death for years.
My wife has a rare type of cancer with not much research thrown at it, and even her type of cancer went from a median time of survival measured in months to several years.
Tooth regrowth is something I was really hoping for. I abused one of my molars. After years of efforts (repeated fillings, a crown) to stave off losing the tooth it finally had to come out last month. Now I'm waiting for the bone graft to "take" before getting an implant. I was hoping I'd waited long enough for tooth regrowth to become "a thing" but I have not.
(Should have taken better care of it when I was younger and not ignored the massive hole that was growing in it. Chalk it up to a bad dental experience as a child and 25+ years of avoiding dentists as a result...)
After a few years of bad mental health, I do have several dental problems, including two badly chipped front teeth. Sadly, my local dentist isn't taking any new patients at the moment so I can't get them looked at even though I now want to. It would be good if I could regrow the teeth but I think it's going to end up being an expensive procedure :/
It would be wonderful if it were someday a routine treatment, but it feels like the technology is perpetually out of reach. If the tech ever does pan out I assume it will be decades until it reaches the masses. It's difficult to be optimistic.
The anxiety about having actual problems with my tooth eventually overrode the anxiety about going to the dentist and I started going regularly (after a pause of 26 years).
I'm pleased that I found a good dentist and I've been able to overcome my anxiety. I recognize that I'm lucky in this regard.
I was also lucky in that, aside from this one problem tooth, my oral care regimen in my 26 years of not having regular dental care were sufficient to prevent any further issues. I expected to come out of that first checkup with massive problems (even though I'd never had any pain or issues) and I was pleasantly surprised.
All in all I think I'm very lucky. I tried to take care of my teeth on my own, and largely succeeded, but I do wish I'd taken care of this one problem tooth before it was too late.
I was reading your comment just as I was sat in the dentist office paying for my partner’s kid long due treatment. She was afraid of dentists and neglected treatment for too long but I took her to the same superb (and expensive) dentist I use for my own kids and she was happy and had everything done. Your comment reminded me why I do it. Thank you.
I am confused by this comment about HIV/AIDS. Is it cynical? Are you confused why we have not "cured" HIV? I grew up during the AIDS Crisis. It was awful. People were dropping like flies. Today, you can be "technically" HIV positive, but test negative, give birth to HIV-negative children, and have unprotected sex (and not infect your partner). As far as I am concerned, the battle has been won. It is a miracle in my eyes.
HIV meds have a slew unpleasant but tolerable (certainly far superior to HIV itself) side effects, imo the battle isn't "won" until the treatment is entirely inconsequential.
That said, the progress has indeed been miraculous. A great example of the capabilities modern medicine.
One-and-done HIV protection in infants - https://news.ycombinator.com/item?id=44736988 - July 2025 (First author of the paper even commented here at the time: "labanimalster - First author here. We solved a 30-year problem in gene therapy by leveraging neonatal immune tolerance. A single AAV vector injection encoding HIV antibodies achieved 89% success in newborns vs 33% in 2-year-olds, with protection lasting through adolescence. This could transform HIV prevention in regions where maintaining regular medical care is challenging. Happy to answer questions about the science or implications.")
it might be slow exponential thing, 60 years of low to medium improvements in cancer, and hopefully suddenly a few big cracks to turn it into a chronic liveable condition (or maybe cure it).
there are more articles about advanced tumors being shrunk to nothing than before (based on my personal monitoring)
I find it interesting that we are closer to regrowing teeth than hair. At least there was human clinical test for TRG-035. Is it just cause hair transplant is "good enough" stopgap solution?
It is probably tough getting investment because this is ultimately cosmetic and not something covered by most dental insurance. Existing repair is probably good enough and I’d expect cheaper too.
As it turns out, this is really hard to do. There are a lot required of teeth: they have to be extremely durable to resist repeated strain of chewing ,stay in the gums, not be rejected by body, etc. It's little surprise progress has been so slow.
Many people are not honest about how much they floss, and those who do often don't floss correctly. We have a well understood mechanism for how tooth decay and gingivitis happen, and it's clear clinically that flossing can address these more effectively than brushing alone can. Furthermore, the subjective reduction in bad breath means harmful oral bacteria are reduced, which could have benefits beyond oral health.
Fortunately there doesn't seem to be any harm from flossing. At least from my anecdotal experience there are positive bad breath ramifications. (I've also been conditioned, by flossing regularly, to feel like my mouth is "cleaner" after flossing, to the point that it feels bad if I don't.)
This is the key issue. There is zero doubt whatsoever that flossing is essential, and the fact that the empirical evidence is equivocal shows the limitations of science to prove even the most obvious things.
I do floss, but I genuinely don't see that this is obvious. You can do a lot of damage with mechanical force, to both teeth and gums! Starting a flossing regimen after not having one tends to cause pain--isn't that a signal to stop? etc.
Furthermore, correlation is not causation and it could well be the case that flossing is associated with better outcomes without causing it. For example, people who can afford to go to the dentist regularly are therefore regularly told to floss. People who care about dental health in general probably floss more, but also may be doing other things, consciously or unconsciously, to improve outcomes. Gut (and perhaps mouth) bacteria have behavioral effects; perhaps flossing is caused by having healthy mouth bacteria!
(at least one study says mouthwash is better than floss. That seems obvious to me! liquids are smaller than floss.)
Actually, recent research suggests daily mouthwash use, especially alcohol-based and antimicrobial formulas, carries underappreciated risks (e.g., Microbiome disruption kills beneficial oral bacteria that help regulate blood pressure while promoting harmful strains linked to gum disease and certain cancers [oral, esophageal, colorectal]; Long-term alcohol-based mouthwash use is associated a with 40-60% increased risk of oral/pharyngeal cancers, with risk scaling by frequency and duration; Chlorhexidine reduces nitrate-reducing bacteria, potentially raising blood pressure and increasing prediabetes/diabetes risk even in healthy users; Some formulas actually increase acidic bacteria that lower salivary pH, promoting tooth demineralization and staining).
In other words, mouthwash offers short-term hygiene benefits but should probably not be used daily unless medically indicated. The oral microbiome matters more than we thought, and indiscriminately nuking it has downstream effects.
Do you have consistent gaps between all your teeth, and/or other conditions like strong enamel, or a good diet? If so, congratulations - flossing might not do much for you. But it's ridiculous to suggest that - if you don't floss and get food stuck between your teeth for days on end - that doesn't have a negative effect. Arguments about correlation/causation be damned.
> Starting a flossing regimen after not having one tends to cause pain--isn't that a signal to stop?
Moderate exercise after not exercising for a while causes pain - is that a signal to stop?
Any chance you would be willing to summarize the research or provide information on some relevant studies? I've always been skeptical about flossing and would like to learn more.
The wikipedia article [1] suggests that there is no strong evidence for flossing being a good thing. However, that might just be because experts have not updated the article.
I hear so many counter-logical ideas proposed with "scientific evidence". Poorly designed studies and P-Hacking has ruined the publics trust in science. I highly doubt flossing is a net negative for almost anyone.
As someone with low maintenance teeth how far has dental tech procedures improved in last 30 years? Feels dental hygienist are all using tools that haven't changed in decades.
My dental practice has only one significant improvement that I’ve noticed in the last 30 years, which is to use a sonic scaler to remove plaque instead of manual scraping with an implement. Somebody in the field would certainly be able to provide a better and more informative answer.
Finally, a gel that regrows enamel like Wolverine’s claws—minus the adamantium bill. Dentists, polish your résumés; the Tooth Fairy’s about to unionize.
one of my front tooth was chipped years ago while playing around and some days ago i was feeling sensitive in that tooth i take very good care of my teeth, when i visited dentist he said this tooth will die sooner or later because of trauma it endured the nerves will slowly die and we eventually have to do root canal. i was very disappointed to know that there is nothing i can do to keep that tooth alive
well most of research i did online and the numerous videos i watched about when root canal is necessary tell this as cases that when tooth endured trauma it will slowly die it may take upto 10 years in this case nothing can be done to save tooth
there maybe some experimental approach that i dont know of that may save or heal tooth do you know any?
If anyone's a dentist or is close to one, I'd love to know something I haven't found a satisfactory answer for online: if the vast majority of cavities were "magically" cured over the next few years, what impact would that have on the finances of your practice?
I'm not suggesting there's a conscious conspiracy or anything malicious. But I observe that incentives are weirdly aligned. I wonder what this kind of thing would do to a very large industry if all of a sudden some percentage of business disappeared. Is it a large percentage? Would they pivot to more preventative medicine? Would patients adopt a longer duration between checkups?
I’m a dentist. If cavities vanished tomorrow, it would definitely change things, but not as much as you might guess. Cavities and crowns make up a decent slice of what most general practices do, but there’s still gum disease, cracked teeth, teeth wear, implants, bite issues, cosmetic work, and so on. A lot of what keeps people coming in isn’t just sugar, although from the outside I understand why it might look like sugar is the whole game.
Financially, there’d be a short-term hit for offices that rely heavily on fillings, but the field would adjust. Most of us would focus more on prevention, maintenance, and elective care. Dentistry has already been slowly shifting that direction for years with better materials, scanners, and aligners.
So if everyone suddenly stopped getting cavities, I’d still have plenty to do. It would just look a little different.
Not a dentist, but my read of the situation is that dentists generally are not very excited about doing fillings and there's a push towards getting into more complex procedures like root canals, invisalign and implants. It's probably partly due to wanting to upskill and increase your repertoire and partly due to the margins. The margins with these procedures can be an order of magnitude more than that of fillings, especially anything that is supplied by a big brand.
I think there would just be fewer dentists. It's like asking what would happen to the finances of weight loss clinics if magically Americans weren't as obese.
Not a dentist but I definitely couldn't see it going away. Also curious to hear a more knowledgeable opinion.
There will always be accidents and need of non-cavity repairs. As a kid I broke a healthy tooth eating Doritos. It didn't make sense to my dentist either. I've broken a less healthy (but repaired) tooth on a candy coated peanut, and one a Twizzler Nib.
I grind my teeth, so everything is being worn and torn at a higher rate. The mouth guard won't generate itself.
Hate to say it, but if I thought my teeth would stick around longer, I'd probably be more likely to seek cosmetic fixes. I'm apparently really hard on them or something.
TL;DR: EDTA is the magic ingredient that will annihilate the disease-causing biofilm on your teeth & gums, especially when you fund your own studies and spend the rest of your money made from your overpriced toothpaste gel on marketing.
Just brush and floss 2x a day, and chew gum if you like to.
This is horrible advice. Do everything you can to keep your original teeth, even partially with a crown is better than a post or dentures. Nothing will perform as good, and the side effects of dentures range from pain to liquid diet if/when your gums can't support them.
My dad did that a couple of decades ago (we nicknamed him Bionic Mouth), and now his body is rejecting almost all of it, and he has to get even more advanced and expensive stuff to replace it (on a fixed retirement income to boot).
An artificial crown may be better, but not the roots. Natural teeth are fixed in the jaw in a very ingenious way that is durable and somewhat flexible at the same time. Not so with implants; the metal fuses with the bone in a hard way and transmits all the shocks fully into the jaw.
Depending on the location, state of the bone and other parameters, anything from mild discomfort to catastrophic failure of the implant and a jaw fracture.
I have four implants, two in my lower jaw, two in my upper jaw. My lower jaw is basically stone, an extremely hard bone even by usual lower jaw standards; the dentists (plural, as one was unable to finish the job) drilling into it destroyed a few drilling bits doing so. I have never had any problems with the lower jaw implants. That bone can take almost anything in stride.
My upper jaw, on the other hand ... very delicate, just enough bone left for the implants to work, and I learnt to be careful about biting into anything harder with them.
Wouldn't you rather reapply a coating that allows the base to regrow, than have to constant get them ground out and replaced as they accumulated small damage? Growth sounds way better than static existence.
Poorly designed studies, materials proposed without insight into ramifications and manufacturing, and P-Hacking has ruined the publics trust in science. I blatantly just ignore any headline like this now. Can't trust science anymore.... sad. How many new "cancer cures" have been posted to Reddit and HN over the last decade that never came to fruition.
Not to say doing the science and studying to find new approaches is not beneficial. I just think we need to reconsider how we communicate new research. Its like how CEOs hype up AI products at this point. "This will change everything ..... potentially maybe in twenty years (omitted)"
> When applied, the gel creates a thin and robust layer that impregnates teeth, filling holes and cracks in them.
Having an option other than crowning to treat cracks would be a game-changer, especially since the AAE not long ago put out a policy paper recommending that all teeth with cracks (even asymptomatic) receive crown coverage, which is both costly and presents a risk of inducing irreversible pulpitis and subsequent necrosis in the tooth (due to the heat and mechanical trauma of the crown prep.).
Coincidentally, there recently was a very similar story from another UK university, where they used a substance found in hair to make a new "tooth repair" toothpaste:
There is evidence that it can foster enamel/dentin mineral gain, but head to head studies shows that it's comparable to regular fluoride toothpaste and not superior. E.g. In a randomized in-situ trial (Caries Research, 2017), adding 5% NovaMin to a 927-ppm SMFP toothpaste did not improve remineralization outcomes vs the same fluoride formula without NovaMin.
Also, you can find NovaMin in the US (e.g., NUPRO Sensodyne Prophylaxis Paste with NovaMin).
i gave her apagard renamel (with nanohydroxyapatite ). after a few days sensitivity went down and after a few weeks it completely disappeared
- Sensodyne Repair and Protect contains 'NovaMin' (possibly only in some markets; check the ingredients!)
- NovaMin is the brand name for calcium sodium phosphosilicate
- It reacts with saliva to form a physical layer of hydroxyapatite on your teeth
- This layer blocks the tubules that trigger pain from temperature and such
- It also supports remineralization (how exactly?)
https://www.jeancoutu.com/en/shop/categories/personal-care/o...
https://www.walmart.ca/en/ip/Sensodyne-Repair-Protect-Sensit...
Btw, what really drives me crazy is that Elmex sells multiple different sorts of tooth paste with the colors green and violett, each. How can a company confuse their customers so much that they buy a tooth whitener paste instead of a remineralizing one? Did the mistake twice...
Please share your experience if you've tried both.
The toothpaste maker wants to claim something like "Novamin is useful". In the EU this is treated as for cosmetics, so relatively low bar to clear. In the US this is treated as pharmaceutical, so a high bar to clear. The manufacturer has decided that passing that bar is not financially sensible for them.
It's actually great stuff and works wonders for tooth sensitivity above and beyond fluoride shellac. I also order it from the more civilized world.
BioMin is available in the US and is similar, but I don't find it works better and I don't like that it doesn't have fluoride. (I live in an area without fluoride in the water)
Unfortunately it isn't actually available where I live (US), and I had to buy it from Canada... from a shop that hasn't had stock for more than a year now. I've tried ordering from other countries, but haven't found anyone else who will ship to the US.
I've tried the "BioMin Restore" toothpaste that is available in the US, and I don't feel like it's doing much of anything, but... again, not sure I'm qualified to evaluate.
I have yet to find a replacement for it.
That said, this particular systematic review has a couple of issues (e.g. I can't find the precise inclusion / exclusion criteria, nor can I find that it has been pre-registered on Prospero or another database).
I have written a few systematic reviews where there is very little data already availabe, and we use them to explain to funders why we need to do further research on a given topic.
Is this a press release from a university research group, as it appears to be (the site is down)? Then it's nearly meaningless.
https://fourthievesvinegar.org/tooth-seal/
All the best,
-HG
[0] https://www.nature.com/articles/s41467-025-64982-y
https://en.wikipedia.org/wiki/Hydroxyapatite
Anyone on this stuff? I want to take a break from fluoride paste.
My current routine is roughly brush_teeth(toothpaste={mirasensitive, random_cheap_toothpaste}[day%2]) as you don't need to apply HAP every single day.
I find that I still have to be careful eating apples and lemons straight up. To protect myself I thoroughly swish and rinse water a few times shortly after consuming these fruits. If I don't do that, my teeth get extremely sensitive and it takes a few days for the hap to repair it again.
For the uninitiated, Theodent is a $100/tube toothpaste made with the chocolate extract theobromine, instead of fluoride, based on a similar paper quite a while back.
https://www.popularmechanics.com/science/health/a66012157/hu... regrowth-trials-japan/
This would highly disrupt the dental-industrial-complex
A paper from 2011 on the topic:
https://pmc.ncbi.nlm.nih.gov/articles/PMC9374843/
There is a lot of hyping of results in medicine papers in general but its not really their fault. The entire academic world is being forced to publish or die as governments look to measure results from the science they instead get what is measured and everyone has to embellish the importance of what they found and always find positive results.
Says nothing about endemic reproducibility crisis of the social sciences.
Since student loans have been basically guaranteed (bankruptcies can’t erase student loan obligations, in an attempt to push rates lower) and tuition steeply rose, academic institutions’ ratio of administrators to students has skyrocketed to a bureaucratic mess, leading to a flywheel of higher education costs and incentivizing research for money’s sake over impact to the field.
Real impact would be reproducing notoriously iffy studies, but that doesn’t bring in the dollars.
It sounds like they're running it like a business.
This eventually leads to competitors taking over and those business failing, which usually results in people losing their jobs.
When governments get equally incapable, and competitors take over, it tends to be a lot more violent.
The escalation in costs have come from: - Incentives around US News College rankings (and the amenities that drive the rankings) - Administrative (non-teaching, non-research) bloat
Research is definitely in need of reform though, but not sure these outcomes are actually causal or even corrilated.
Hey, good point. We should really bring back that 90% top tax bracket rate to get the government back to being financially solvent again.
You can argue that it's overall bad for the economy, but I think you're missing the arguement.
If only that fairytale were true. In the real world bloated inefficient companies bribe government, install themselves into government agencies directly (regulatory capture), and hire lobbyists to write laws which protect them from pesky upstarts through unchecked anti-competitive practices and anti-consumer regulation allowing them to stay wealthy and in power forever while killing off innovation and progress.
It's important to note that "eventually" usually takes so long that it might as well be forever.
The potentially easier way at least to get a lay of the land is to follow pubmed (https://pubmed.ncbi.nlm.nih.gov/) for the topic you are interested in, if you then look into those papers you will find funding statements as well as the place the research was conducted and use both to build up a picture of the origins of research in a field.
Afraid I don't know of an easier way not a generic one anyway. Sometimes you just have to follow the right person on twitter who announces trials or studies or be at the right conference. Start with pubmed and the output papers and that will get you started. Then also have a search on the NIH and that might lead you to some links to groups and institutions they fund.
The problem is some people prefer an academic lifestyle in exchange for doing performative research.
Yes there are other actors eg politicians demanding performative productivity, but mostly it’s the inmates running the asylum.
Academia is one failed western institution amongst many, and those failures are ultimately directed by the actions of the individuals that comprise those institutions.
Right, and the prisoner's "dilemma" isn't a real thing; everyone knows it's their own fault for not just all picking the decision that gives them all the best outcome. Every individual within a network effect is obviously responsible for the outcomes the entire system produces.
It is like saying, if everyone stops subscribing to OnlyFans or liking spicy pics on Instagram, it will go away.
There will always be sycophants willing to do "performative research" or ... other things.
Arguably America is the pinnacle of this right now, where (many) politicians and (many) business leaders now feel justified do whatever's legal just to score points. I would argue this type of thinking was birthed in the UK though under Thatcher who as a first step removed the general trust in (civil servants in her case) your fellow human beings. Blair then came up to replace that trust with KPIs.
We need to get back to a world where we trust people to do the right thing - without measuring their success in short-term KPIs.
https://www.ebay.com/itm/127083185095
"proven to strengthen tooth enamel" I remember researching the stock and deciding not to buy.
Patents from the 1990s https://patents.justia.com/assignee/enamelon-inc
It seems the company is still around https://www.enamelon.com
_EDIT: “repair and protect”_
https://news.ycombinator.com/item?id=36564190
re: dental in particular - It seems like enamel regeneration and stem-cell-based tooth replacement have both been in the news year-after-year without applications actually coming to market.
Na, that’s the working class turkey teeth crowd.
Really? This sounds more like someone's plan to get grants to research stem cells than someone's plan to repair (or replace) teeth.
We already have a natural ability to grow new teeth that replace existing ones. Everybody does it... once. Where's the research into getting it to happen again?
> Primary (baby) teeth start to form between the sixth and eighth week of prenatal development, and permanent teeth begin to form in the twentieth week.
So it's probably too late for you.
Here's an example of one from earlier this year at King's College, London: https://www.kcl.ac.uk/news/lab-grown-teeth-might-become-an-a...
> Uterine sensitization-associated gene-1 (USAG-1) deficiency leads to enhanced bone morphogenetic protein (BMP) signaling, leading to supernumerary teeth formation.
[1] https://pubmed.ncbi.nlm.nih.gov/33579703/
[1]https://www.science.org/doi/10.1126/sciadv.aaw9569
https://www.sciencedirect.com/science/article/abs/pii/S03005...
You must be new
I was about to comment the same thing, I feel like I've been seeing this talked about since the 90s
on the neuroscience side, off the top of my head, the most impactful things have been better anticoagulants and preventive care for stroke, monoclonal abs for autoimmune diseases like MS/myasthenia, , certain stereotactic brain surgeries, and such. But considering what ails most people, the overall population effect probably is minuscule compared to say better crash safety in automobiles.
- Cancer
- Tooth regrowth
It feels like it won’t ever be done for some reason
Depending on the type of cancer, we now have cures or treatments that stave off death for years.
My wife has a rare type of cancer with not much research thrown at it, and even her type of cancer went from a median time of survival measured in months to several years.
(Should have taken better care of it when I was younger and not ignored the massive hole that was growing in it. Chalk it up to a bad dental experience as a child and 25+ years of avoiding dentists as a result...)
Just in case you need someone to, y’know, empathise with you.
I have a lot of people in my life who don’t understand why I don’t just go to the dentist
I'm pleased that I found a good dentist and I've been able to overcome my anxiety. I recognize that I'm lucky in this regard.
I was also lucky in that, aside from this one problem tooth, my oral care regimen in my 26 years of not having regular dental care were sufficient to prevent any further issues. I expected to come out of that first checkup with massive problems (even though I'd never had any pain or issues) and I was pleasantly surprised.
All in all I think I'm very lucky. I tried to take care of my teeth on my own, and largely succeeded, but I do wish I'd taken care of this one problem tooth before it was too late.
That said, the progress has indeed been miraculous. A great example of the capabilities modern medicine.
One-and-done HIV protection in infants - https://news.ycombinator.com/item?id=44736988 - July 2025 (First author of the paper even commented here at the time: "labanimalster - First author here. We solved a 30-year problem in gene therapy by leveraging neonatal immune tolerance. A single AAV vector injection encoding HIV antibodies achieved 89% success in newborns vs 33% in 2-year-olds, with protection lasting through adolescence. This could transform HIV prevention in regions where maintaining regular medical care is challenging. Happy to answer questions about the science or implications.")
US FDA approves Gilead's twice-yearly injection [lenacapavir] for HIV prevention - https://news.ycombinator.com/item?id=44312729 - June 2025
there are more articles about advanced tumors being shrunk to nothing than before (based on my personal monitoring)
+ Alzheimer’s cure
+ Hair regrowth
...they were persistent vaporware or scams, then suddenly they were real and everywhere. Hopefully that happens for the others too?
They've had those for decades. It's called meth.
Cancer treatment varies by type of cancer but many have dramatically improved outcomes.
https://www.technologyreview.com/2007/02/22/272845/regrowing...
As it turns out, this is really hard to do. There are a lot required of teeth: they have to be extremely durable to resist repeated strain of chewing ,stay in the gums, not be rejected by body, etc. It's little surprise progress has been so slow.
Furthermore, correlation is not causation and it could well be the case that flossing is associated with better outcomes without causing it. For example, people who can afford to go to the dentist regularly are therefore regularly told to floss. People who care about dental health in general probably floss more, but also may be doing other things, consciously or unconsciously, to improve outcomes. Gut (and perhaps mouth) bacteria have behavioral effects; perhaps flossing is caused by having healthy mouth bacteria!
(at least one study says mouthwash is better than floss. That seems obvious to me! liquids are smaller than floss.)
In other words, mouthwash offers short-term hygiene benefits but should probably not be used daily unless medically indicated. The oral microbiome matters more than we thought, and indiscriminately nuking it has downstream effects.
> Starting a flossing regimen after not having one tends to cause pain--isn't that a signal to stop?
Moderate exercise after not exercising for a while causes pain - is that a signal to stop?
[1] https://en.wikipedia.org/wiki/Dental_floss#Efficacy
Site is down, not in archive.org or archive.today. This Yandex Cache link worked for me: https://yandexwebcache.net/yandbtm?fmode=inject&tm=176237557...
there maybe some experimental approach that i dont know of that may save or heal tooth do you know any?
I'm not suggesting there's a conscious conspiracy or anything malicious. But I observe that incentives are weirdly aligned. I wonder what this kind of thing would do to a very large industry if all of a sudden some percentage of business disappeared. Is it a large percentage? Would they pivot to more preventative medicine? Would patients adopt a longer duration between checkups?
Financially, there’d be a short-term hit for offices that rely heavily on fillings, but the field would adjust. Most of us would focus more on prevention, maintenance, and elective care. Dentistry has already been slowly shifting that direction for years with better materials, scanners, and aligners.
So if everyone suddenly stopped getting cavities, I’d still have plenty to do. It would just look a little different.
I also would imagine cleanings aren't where the big money is in the profession, but like you would be interested to hear from actual dentists.
There will always be accidents and need of non-cavity repairs. As a kid I broke a healthy tooth eating Doritos. It didn't make sense to my dentist either. I've broken a less healthy (but repaired) tooth on a candy coated peanut, and one a Twizzler Nib.
I grind my teeth, so everything is being worn and torn at a higher rate. The mouth guard won't generate itself.
Hate to say it, but if I thought my teeth would stick around longer, I'd probably be more likely to seek cosmetic fixes. I'm apparently really hard on them or something.
Hmm.
Usually the safety profiles of those companies are very very very bad, but probably reference very good research.
TL;DR: EDTA is the magic ingredient that will annihilate the disease-causing biofilm on your teeth & gums, especially when you fund your own studies and spend the rest of your money made from your overpriced toothpaste gel on marketing.
Just brush and floss 2x a day, and chew gum if you like to.
If you ever get into any serious money, forget cars or houses: have your teeth ripped out and replaced with artificial ones.
These doctors pioneered silicone breast implants.
Eventually side effects happened, and they tried to prevent those patients from coming forward.
Later, it all came out... and all the patients just came back to them and paid for breast upgrades to the next generation saline implants.
I wouldn't be surprised if this can, over time, also cause damage to your jaw, and put extra stress on your jaw muscles.
I have four implants, two in my lower jaw, two in my upper jaw. My lower jaw is basically stone, an extremely hard bone even by usual lower jaw standards; the dentists (plural, as one was unable to finish the job) drilling into it destroyed a few drilling bits doing so. I have never had any problems with the lower jaw implants. That bone can take almost anything in stride.
My upper jaw, on the other hand ... very delicate, just enough bone left for the implants to work, and I learnt to be careful about biting into anything harder with them.
Not to say doing the science and studying to find new approaches is not beneficial. I just think we need to reconsider how we communicate new research. Its like how CEOs hype up AI products at this point. "This will change everything ..... potentially maybe in twenty years (omitted)"
https://youtu.be/L1JR-9Z5ORE?si=6f4r6hu-_WoVBlsL
Having an option other than crowning to treat cracks would be a game-changer, especially since the AAE not long ago put out a policy paper recommending that all teeth with cracks (even asymptomatic) receive crown coverage, which is both costly and presents a risk of inducing irreversible pulpitis and subsequent necrosis in the tooth (due to the heat and mechanical trauma of the crown prep.).
https://news.ycombinator.com/item?id=44922571
He’s a pretty modern dentist I think. He has no idea about it.