Under normal circumstances, dental and close contacts between the teeth, will not happen Seya. So Seya is how it happened in its teeth and tooth is due to contacts between the relationship has changed.
Adjacent teeth changed, common causes are:
1 o-carious, and destroyed the contact area and the marginal ridge.
2 filling defect.
3 severe wear, edge ridge defect.
Four teeth missing a long time, no time for dentures, the two cases Queya District teeth shift, dental gap widened.
5 periodontitis teeth loose, displacement.
6 traumatic dental defects.
7 teeth with disorder.
8 no teeth to bite caused elongation, the common upper third molar elongation. Food impaction can be divided into vertical impaction and level of impaction. From the teeth bite for the next upward or food squeeze into the teeth gap, known as vertical impaction. If food from the teeth of a case, such as buccal or lingual squeeze into the teeth gap known as the level of impaction.
Long-term food impaction can have two aspects of the hazards:
1 cause dental carious.
2 cause inflammation of gum tissue necrosis and alveolar ridge defect.
Food impaction of the treatment is symptomatic treatment:
1 o-carious teeth filling defect can repair defects, to address the Seya.
2 severe wear on the verge of a defect shell crown, or dentures, tooth-wide production of surface-o-inlay.
3 severe periodontitis have reached the root of the alveolar bone absorption 1 / 2, should deactivation to pulp mill and short teeth, making periodontal splint.
4 no teeth to bite elongation, should be removed. The level of food impaction treatment more difficult.