DaveC426913 said:
I do not believe this is true. Wisdom teeth are removed routinely because our jaw is too small to hold all those teeth, and wisdom teeth frequently get impacted. Removing them as soon as they begin causing trouble is routine. I do not believe the removal of wisdom teeth has anything to do with cavities.
That is what my dentist told me, an erupted wisdom teeth can cause decay, cavities is probably a too specific term. According to the following website:
http://www.nobledentist.com.au/education/wisdom_teeth.php
Why Remove Wisdom Teeth?
Wisdom teeth generally cause problems when they erupt partially through the gum.
Below are the most common reasons for removing wisdom teeth.
1. Tooth decay
Saliva, bacteria and food particles can collect around an impacted wisdom tooth, causing it, or the next tooth to decay. It is very difficult to remove such decay. Pain and infection will usually follow.
2. Gum infection
When a wisdom tooth is partially erupted, food and bacteria collect under the gum causing a local infection. This may result in bad breath, pain, swelling and the inability to open your mouth fully. The infection can spread to involve the cheek and neck. Once the initial episode occurs, each subsequent attack becomes more frequent and more severe.
3. Pressure pain
Pain may also come from the pressure of the erupting wisdom tooth against other teeth. In some cases this pressure may cause the erosion of these teeth.
4. Orthodontic reasons
Many younger patients have had prolonged orthodontic treatment to straighten teeth. Wisdom teeth may cause movement of teeth particularly the front teeth when they try to erupt. This will compromise the orthodontic result.
5. Prosthetic reasons
Patients who are to have dentures constructed should have any wisdom tooth removed. If a wisdom tooth erupts beneath a denture it will cause severe irritation and if removed, the patient will need to have a new denture constructed as the shape of the gum will have changed.
6. Cyst formation
A cyst (fluid filled sac) can develop from the soft tissue around an impacted wisdom tooth. Cysts cause bone destruction, jaw expansion and displacement or damage to nearby teeth. The removal of the tooth and cyst is necessary to prevent further bone loss. Tumors may develop within these cysts or the jaw may fracture spontaneously if the cyst grows very large.