上颌前方牵引前反复扩缩效果及对上前牙稳定性的比较

摘要/Abstract

摘要： 目的：对比上颌骨前方牵引前使用反复扩缩与直接前方牵引两种方式对于上颌骨位置改变的疗效以及对于上前牙稳定性的比较，探讨更适合的治疗方法。方法：选取山西医科大学口腔医院正畸科就诊的20例安氏Ⅲ类错颌畸形的患者，并随机分为扩缩组与未扩缩组，扩缩组先反复扩缩8周，8周后与未扩缩组同时开始前方牵引，3个月后分析比较治疗前后的头影测量指标。结果：扩缩组治疗后SNA、ANB、U1-SN、MP-SN、UL-EP值均增大，差异均有统计学意义（P＜0.05）；未扩缩组治疗后SNA、ANB、U1-SN、MP-SN、UL-EP值均增大，差异均有有统计学意义（P＜0.05）；两组患者治疗前后SNA、ANB、U1-SN、MP-SN、UL-EP的变化大小不同，差异有统计学意义（P＜0.05），扩缩组的变化程度高于未扩缩组；扩缩组上前牙唇舌向的动度仅与治疗前后ANB变化程度的等级相关系数有统计学意义，二者呈正相关关系。结论：替牙期骨性Ⅲ类错颌畸形前方牵引前先进行反复扩缩较直接进行前方牵引有较好的临床疗效，但会引起上前牙一定程度的松动。

关键词: 前方牵引, 反复扩缩, 前牙动度

Abstract: OBJECTIVE: The thesis compare the effects of alternate rapid maxillary expansion and constriction before maxillary traction and direct anterior traction in the early permanent dentition skeletal class Ⅲ. Simultaneously compare the stability of upper anterior teeth.Accordingly explore a more suitable treatment method. METHODS: Twenty patients with Class III malocclusion were selected from the Department of Orthodontics, Stomatology Hospital of Shanxi Medical University. They were randomly divided into an expandsion and contraction group and unexpanded group. The sample in expansion and contraction group was repeatedly expanded for 8 weeks. 8 weeks later,the anterior traction was started at the same time as the unexpanded group, the cephalometric measurement indicators before and after treatment were analyzed and compared after 3 months. RESULTS: The values of SNA, ANB, U1-SN, MP-SN and UL-EP increased after treatment in the expansion group (P<0.05). SNA, ANB, U1 after treatment in the non-expanded group The values of -SN, MP-SN and UL-EP were all increased, and the differences were statistically significant (P<0.05). The changes of SNA, ANB, U1-SN, MP-SN and UL-EP before and after treatment in the two groups. The difference was statistically significant (P<0.05). The degree of change in the expansion and contraction group was higher than that in the non-expanded group. The correlation between the anterior teeth and the lingual direction of the expansion and contraction group was only related to the degree of ANB change before and after treatment. Statistically significant, the two are positively correlated. Conclusion: Repeated expansion and contraction of the skeletal class III malocclusion before volition in the dentition period has a better clinical effect than direct anterior traction, but it will cause a certain degree of loosening of the upper anterior teeth.

Key words: anterior traction, exparison and contraction before maxillary traction, the stability of upper anterior teeth

中图分类号:

R783.5

马艳宁武秀萍. 上颌前方牵引前反复扩缩效果及对上前牙稳定性的比较[J]. , 2019, 39(6): 519-522.

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