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The Relation Ship Between the Changes of Facial Form and the Changes of Lip Pressure of Pre-and Post-Orthodontic Treatment.

正畸治疗前后面形变化与唇压变化的关系。

基本信息

批准号：
63570973
负责人：
IWASAWA Tadamasa
金额：
$ 1.41万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

The purpose of this study is to evaluate the relationship among the changes of tooth position, the changes of facial form and lip pressure of pre-and post-orthodontic treatment. The reliability and measurement accuracy of moire topography in three dimensional assessment of the human face were discussed and this method appeared to be suitable to analyze the face. The devices employed in this study were pressure transducers using resistance-strain gauges.The following results were obtained.1. The pre-treatment lip form related to the position of lower incisors in anterior cross bite patients. But in post-treatment the lip form related to the position of the upper incisors. The upper lip pressure of post-treatment showed a tendency of higher labial pressure than the pre-treatment, but lower lip pressure of the post-treatment showed a tendency of lower labial pressure than the pre-treatment.2. The changes of the soft tissues were highly correlated with the changes of hard tissues in surgical orthodontic treatment. In post-treatment Upper lip pressure increased and lower lip pressure decreased than the pressure of pre-treatment.This study demonstrated that the lip pressure was one of the factors of making the dental arch form, and the tooth position or the arch form after orthodontic treatment functinally suitable to the new oral conditions.

本研究旨在探讨正畸治疗前后牙齿位置的变化、面部形态的变化与唇压的关系。讨论了云纹形貌法在人脸三维评估中的可靠性和测量精度，表明该方法适用于人脸分析。本研究所采用的仪器为电阻应变式压力传感器，其结果如下：1.前牙反患者矫治前唇形与下切牙位置有关。但在矫治后，唇形与上切牙的位置有关。结论：1.治疗后上唇压力较治疗前有升高的趋势，而下唇压力较治疗前有降低的趋势。正畸治疗过程中软组织的变化与硬组织的变化密切相关。治疗后上唇压力较治疗前增加，下唇压力较治疗前降低，提示唇压是影响牙弓形态的因素之一，正畸治疗后牙位或牙弓形态在功能上与新的口腔条件相适应。