why do teeth grow back?
154660
Human teeth don't grow back. As most mammals, we are diphyodont, that is, we have 2 generations of teeth (milk teeth, and definitive teeth). We change our incisors, canines and premolars once during childhood, and our molars (which have no replacement) grow later and slower (some people never get their 3rd molar). \nSo if you lose your milk teeth, you get a second set; but if you lose your definitive teeth, it means dentures.\n\nOther vertebrates are polyphyodont (or oligophyodont), that is, they have multiple generations of teeth and constantly replace them.
245226
Researchers in Adelaide have found stem cells exist inside the teeth, in a discovery that could one day lead to teeth being regrown or repaired.\n\nResearchers say they have found a colony of stem cells existing in the core of a human tooth.\n\nStem cell biologist Stan Gronthos yesterday told a symposium on stem cell research that the goal is to store harvested dental stem cells in liquid nitrogen, ready for use to repair damaged or diseased teeth.\n\nBut he says there is a lot of work still to be done.\n\n"It's a complex organ and it's got many tissues associated with it so it's going to take a lot of study to actually try and form a living tooth in an animal," he said.\n\n"At the moment technology is at the stage where we can probably repair portions of the tooth."
1013211
because people have 32 teeth and once a teeth is gone .. they are gone ... we never have our teeth grow like many other parts like nail, hair...
842965
Bottom teeth wiggly eh?  That's cause of periodontal disease.  The ligaments that hold your teeth in their sockets are dying and they never come back...I estimate you will be wearing full dentures within ten years....and that is soooooo sexy in a 27 year old.
1038188
Not all cavities grow! By drilling into a small cavity you will have to make it larger and therefore create a bigger filling, so tiny cavities are left to see if the grow. The best way to stop it happening is to limit your sugar intake. Sugar rots teeth and the teeth take 3 hours to repair themselves after a sugar attack, so in short limit the amount of sugar to a minimum of 4 hour intervals. This includes tea & coffee (if you have sugar), all drinks except milk and water and most foods i'm afraid. At meals you can have as much sugar as you want, sweets, fruit, fruit juice etc as you meal will contain sugar. As I am a dental nurse, this is the advice we provide to our patients and have really noticed the difference in the patients that follow the advice. And the most important time to brush your teeth is before bed with an electric toothbrush.\nHope this helps
1040304
The tooth is basically encased in bone. They usually cut away the "roof" of bone and a little bit around the tooth to get it out. The hole that is left over usually fills back in with bone and shouldn't cause any problems.
773640
normal...no, but like i explained in aother answer, extra teeth are created by epithelial pearls. the epithelial pearls come from the degeneration of the dental lamina in your mouth when your were a foetus. usually the destruction is complete, but in your case, i guess the destruction wasnt done well. (cause by traumatism?)
391983
Occasionally, there can be a sudden increase in the forces applied to the teeth, as is the case when a person develops a tooth grinding habit or seizure disorder. Assuming that this is not the case, the problem is some kind of structural weakening in the teeth themselves.\nTeeth may be weakened by active decay, or by the placement of large fillings to restore decay. Often the weakening produced by the resulting loss of tooth structure does not manifest immediately. However, over time, chewing forces slowly act on these weak points, creating microfractures that propagate through the tooth until it finally breaks.\nThere are broad guidelines that dentists apply when deciding the proper way to restore a broken or decayed tooth. These guidelines occasionally point the way to an inappropriate treatment, or perhaps the dentist or patient compromise an "ideal" treatment plan for reasons of time or financing. In either case, a choice is made where a filling is placed where, in retrospect, a crown or onlay may be proven to have been a better choice of restoration.\nIt is probable that you are now reaping the result of just such past compromises. Perhaps large fillings were placed where a crown would have served you better. No matter; most fractured teeth can be restored by placement of a crown. This will reinforce the remaining tooth structure and protect it against future breakage.\nWe'd advise you to consult with your dentist. In addition to the broken tooth, he may be able to detect other teeth that have a high probability of breaking in the near future. If you dislike surprises, you may want to consider pre-emptively crowning these weakened teeth before they break.
249013
Because you have nerves that go into your teeth.  When you have your teeth done, the nerves can become irritated.  It usually goes away pretty quick.
821072
IN DENTISTRY THERE IS A PHENOMENON CALLED MESIAL DRIFT. WHAT THIS MEANS IS THAT TEETH DENT TO SLOWLY DRIFT TO THE CENTER OF THE MOUTH WHEN THERE IS A SPACE BETWEEN THE TEETH. TEETH DO NOT EVER MOVE TO THE REAR OF THE MOUTH.\nYOU  DIDN'T SAY WHY THIS TOOTH NEEDED TO REMOVED IN THE FIRST PLACE.
831478
it restores the shape and size of a tooth. it contributes to efficient chewing because it is made to meet the opposing teeth correctly. when the crown or its outer part is tooth coloured it restores the appearance of the tooth. in the case of a heavily filled or weakend tooth, particularly a back tooth, it holds everything together and so prevents any weakend pieces chipping off or cracking.\na crown acts as a strong band around a tooth keeping everythinkg together. a crown may be used for a front tooth  when it has been badly broken or heavily filled or if it has had root canal and has changed color. a crown may be used in the back again if the tooth has been heavily filled or a piece of the fulling or the remaining tooth has broken off.\n\nUm disadvantages, hmm cant really think of any except the cost. which is usually about $1100.00 australian dollars....
469655
I also had this problem. The bad news is that you cant get your gum to grow back. But you can prevent from goingdown, and you can have surgery to fix it. The surgery isnt too expensive, but is kinda painful. What they do is take a patch of skin from the roof of the inside of your mouth, and put that where your gums have been receding. Then they cover it with a wax-like coat to protect it until it heals. Ask your dentist about this. Also, try Creast Mouth Wash to prevent further gum receding. \n\ngood luck!
320737
No. Just your liver and brain cells. Nothing so notably important as your teeth, thank god.
450982
You need your molars, wisdom teeth are questionable.  Many dentists will in fact restore wisdom teeth, I for one had wisdom teeth filled when I was in hygiene school as I did not have time to have them pulled.  The problem with wisdom teeth is that they are so far back in the mouth that it is hard to restore them.  Also when they are this far back it is very hard to keep them clean, hence you have cavities in them.  Many dentists would just rather go ahead and extract them as long as you have all of your other teeth because it is easier then trying to fill them being so far back.  Also they really don't know how deep the decay is until they get into drilling the tooth to see the inside.  If the decay is deep, close to the pulp (nerve) then they would prob. just extract it anyway.  Why go through all of this work, when they could just extract in the first place?  Again as long as you have all of your other adult teeth intact, then your doc has a good reason why he wants to extract.  I  would have had my two wisdom teeth with decay in them extracted in the first place, but I could not miss the time from school.  So I just had them filled as a temporary measure until I could get them out.  Well five years after hygiene school, I finally had them out.  No problems at all.  I don't miss them at all.  It is too hard trying to get floss that far back. You do have the right to have your opinion heard though, if for some reason you want to keep your wisdom teeth, then let your dentist know.  He then will tell you why or why not you should keep or extract them.  Make sure you know all of the pros and cons.  Be an informed consumer.
1049368
yes, stem cells have been used to regrow teeth in rats.  it's still 20 years off at least for humans.  the theory is that you'll be able to drop some stem cells into a hole in someone's jaw and 5-6 years later you'll have a magic new tooth.  the research is mainly based overseas since we have such strict regulation on stem cells in the US.
346127
That's a great question. I had braces for 2 years (age 12 -14) to correct slight crowding at the back and side of my mouth...you couldn't even see them. I wish I would have left them alone, and not worried about it. Braces do mess with your enamel, and sometimes the coloration of your teeth will differ after their removal. This is on an individual basis, and some people aren't affected. I have since had veneers put on my teeth to correct the thinned enamel, and color differences that were there.
51816
My guess is growing new teeth with stem cells.