Re: Can Wisdom Tooth Cause This?
One of the reasons (besides just crowding and shifting) it is not good to leave wisdom teeth in when there is not enough room in the mouth for them to fully erupt is that they can grow up against the mandible (lower jaw bone) and possibly impinge on the nerve that is housed in that area. Removing a wisdom tooth after this has occurred may cause permanent damage to the nerve, resulting in permanent loss of feeling and function in areas that the nerve supplies.
The other risk is for removal of upper wisdom teeth. If they are allowed to start erupting where there is not enough room for them, it is possible that the root of the teeth may be lying snug against the floor of the sinus. If they are removed by a good oral surgeon, complications are unlikely -- the oral surgeon can tell you for sure if it is imperative that you have them removed or if it would be ok to leave them in. However, the most common complication in this situation is this: since the tooth is sitting against the bone, as the tooth is being extracted, it could possibly break a hole in the bone in the floor of the sinus where it was making contact. The sinus walls are very thin bone, making them fragile and susceptible to breaking with this type of force. Remember, though, that this complication is rare, and your oral surgeon should be able to determine if you are at risk for this happening by looking at the radiographs. The correct decision should be made by weighing the risks of leaving the teeth in with the risks of taking them out.
As you can see, this is why the best thing for everyone to do is to have wisdom teeth removed BEFORE they are fully developed and erupted. The root is the last structure of the tooth to form, so you want them removed before the root becomes involved with the jaw bones to minimize complications later. Sometimes the wisdom teeth are lying against the bone anyway, and there's nothing you can do about it...it's just the way you were made.
So, why would you want to remove your wisdom teeth if they fit into you dental arches with no problem? Here is why: it is difficult to reach the most posterior surface of molar teeth with your toothbrush and floss to remove plaque. If you can't remove the plaque, you are at greater risk for caries/decay in those areas, as well as periodontal disease. Lots of people miss these areas on their second molars...imagine the difficulty reaching all the way back behind a third set of molars! Why make your home care more difficult and time consuming, and deal with caries risk if you don't have to? You don't need a third set of molars - two sets of molars are plenty functional! As long as you have your first and second molars, there is no reason to have another set of molars - because the risk of disease while having them present is higher than the actual need for the teeth.
The only reason a third molar would ever be needed to provide full function is if you have lost one or both molars for whatever reason. In this case, a wisdom tooth may be retained to replace the first or second molar that has been lost. Then, there would be an obvious need for that extra tooth. Usually if this is the method used for replacing a lost molar, it will take some working with your dentist to align the teeth so that the tooth/teeth behind the space where the tooth is missing do not drift into and lay down to fill in that space. If your tooth is laying down, horizontally, it has no function that way, either, so it is important that the teeth are guided into that spot so they stay upright and in good function.
If you question anything I've suggested here, you can ask your dentist or oral surgeon. Hopefully, though, this gives you a better knowledge base and an understanding to go from when you are discussing your oral health issues with your professional health care provider of choice...I know a lot of times the professionals that treat you don't take the time to thoroughly explain procedures and the rationale behind them. It usually doesn't mean they don't know what they're doing or that they're doing something wrong - they just think they have more important things to do than going in-depth on educating their patients about their own oral health care! Sad, but true. Most people don't know the true benefit of having their wisdom teeth removed.