正畸保持期复发情况的临床调查分析

Clinical investigatory analysis of relapses in the phase of orthodontic retention

目的:评估错(牙合)畸形在正畸保持期的复发情况,为临床保持设计提供依据,以期减少或避免复发。方法:选取476例正畸保持期患者,对不同保持类型的复发率、复发常见临床表现及复发原因进行统计分析。结果:采用活动保持的复发率高于固定保持,保持期复发多表现为个别牙齿的错位,而常见的复发原因为患者未认真配戴保持器、保持时间过短等。结论:对不同患者,强调个性化保持设计。

Objective: To evaluate the relapses in the phase of orthodontic retention, providing some reference for the clinical practice and expecting to diminish or avoid relapses. Methods:The sample consisted of 476 patients in retention phase. Statistical analysis was performed to relapse rate of different retention types, clinical manifestations and causes of relapses. Results: The relapse rate of removable retainer is apparently higher than fixed retainer. The main clinical manifestation of relapses during retention phase is the disalignment of individual tooth ; main cause is that patients did not wear the retaier according to doctor's orders and retention time is insufficient. Conclusions: For different patient, individual design of orthodontic retention should be performed.