A new story from Live From Here with Chris Thile

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You like to know you got a molar mystery to crack are you by cuss but curious yes we want your cavity questions or grill us about the guns you make the call but only if you make the call our number is eight four four seven two four eight two five five eight four four cite talk you can also tweet us at sai fry the meat go I've now try to keep all the dental plans out as much as I think we need to do is make guests talk to mark wolf dean of the school of dental medicine the university of Pennsylvania in Philadelphia welcome back mark hire great to be back you're welcome Dr Reena to Susanna is professor van to St at the university of Utah in Salt Lake and former president of the international association of dental research welcome back this is thank you are I'm a big fan and and the very loyal NPR devoting lots K. well I'm happy to be here nice to be there were not an impure but we are public radio public radio sorry okay let me ask you let me ask you well let me ask you then first arena having cavities form in the first place what do you need to have a cavity forms yeah I think you know if you look to the of the mammals that that B. C. visibly coding the crown of the tooth it is ninety seven percent mineral so obviously when you have something that is so hard and and the cells that produce it on no longer in the miles then it's very susceptible two of us bio films and deposits that lead on the tooth so when you have a bio foam that builds up over time with bacteria bugs having a being attracted to the film and you provide these bugs with a lot of food and typically that all that is substrates from carbohydrates a principally and then that interaction creates acids because the bacteria actually dissolves these food substances and produces acid that been dissolved that very hard surface of the novel that is made out of appetite and that is the beginning of a cavity factor will finally see cavities mostly where the teeth touch each other hi so there's two reasons for that one is that's where the sugars can get into and stay there and second saliva contains a number of things that actually can neutralize the acid that contains bicarbonate it also can rinse away those foods and it just can't reach in between the teeth easily so the bacteria sit and eat and they poop assets okay now I've got a bit of met like that you're they don't hate us all the do we please let reproduce yes we let them build up in a location they have a nice family that eats lots of sugars that are readily available because of a diet and they pull plots of acids and we get cavities all right we got so many questions let's go right to that let's go to rich in Charlotte North Carolina I rich one minute go ahead asking dental bright a dental visit to might not reach us student discount a cavity on the outside not so we'll be able to register on the topic you we propose the option of of drilling and filling and I'm just wondering is it possible for early stage capital for the business which are on the X. ray is a possible quote to be reversed and possibly re mineralised a repaired in any fashion without having to write question mark question yes yeah that would be a local okay so are the answer is not all not all cavities can be seen on dental X. rays but if it's an early lesion just starting they can be reversed by keeping the sugar is out of the mouth reducing the amount of plaque that's in the area but you have to do really well with that but more importantly than that we can have agents like fluorides which can help re mineralised those surfaces and actually packed the mineral back in and make the two self E. it's possible to take early two fifty K. and totally reverse it can keep you in a healthy state prevented because you brought it up when I was gonna ask this later but I'll ask it now how important is it for you to have a dental X. ray because I've known cancers who say you know a good dentist can find a cavity or are not subject you to X. rays that you know might be invasive in your brain or something like so that's exactly what was written in nineteen thirteen by visor great grandfather of of dentistry G. V. black that give me a bright light America and then explore and I can find all tooth decay as it turns out dental radiographs help us fine tooth decay at earlier stages where it is totally reversible that being said we should take as few radiographs as few xrays as is indicated by.

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