Abstract:

Objective To evaluate the short-term and middle-term effects of post and core crown repairing anterior teeth with different buccal dislocation. Methods We selected adult individual anterior teeth with buccal dislocation as experimental group and anterior teeth without buccal dislocation as control group. The teeth of experimental group were divided into two groups, which were group Ⅰ（20°-30°） and group Ⅱ（30°-40°）. All the teeth of experimental group and control group were repaired by cast post and core crown. Results The ratio of success cases for control group were nearly 90% after 2 and 5 years. Meanwhile, the ratio of success cases for group Ⅰ were 89.74％ after 2 years and 77.78％ after 5 years, but for group Ⅱ were just 75％ after 2 years and 55.88％ after 5 years. Conclusion It could achieved a good result for post and core crown when the angles of anterior teeth with buccal dislocation were less than 20° or when the anterior teeth without buccal dislocation. It is acceptable for a short-term repairing when the angle between 20° and 30°. But the effect of prosthesis were decreased dramatically when the angles greater than 30°. It is concluded that part of the buccal dislocation of anterior teeth should be improved.

Key words: buccal dislocation, post and core crown, angle of post and core