Comparison of static teeth exposure in different postures and its influencing factors of orthognathic surgery patients.

Tianwen Zhang, Huijun Yang, Feng Wang, Bo Lin, Hongyu Yang
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Abstract

Objectives: This study aimed to explore the differences and influencing factors of static teeth exposure in different postures of orthognathic surgery patients.

Methods: A total of 148 patients were collected before or after orthognathic surgery. Photographs were taken in the upright and supine positions, and the static teeth exposure values were measured to compare whether the difference among different positions was statistically significant. The patients were classified in accordance with gender, presence or absence of orthodontic brackets, measurement time (preoperative or postoperative), and maxillary movement direction (forward or backward), and the difference of static teeth exposure was compared. The correlation between the difference of static teeth exposure and age was analyzed.

Results: The diffe-rence of static teeth exposure between the two positions was 0.99 mm±0.95 mm, which was statistically significant (P=0.000). A statistical difference in the difference of static exposure was observed between female and male (P<0.05). No statistical difference in the difference of static exposure was observed among orthodontic brackets, preoperative or postoperative time points, and maxillary movement direction. In addition, no significant correlation was found between the difference of static teeth exposure and age (r=-0.087, P=0.291).

Conclusions: Compared with the upright position, the static exposure of teeth increased by approximately 0.99 mm in the supine position. The difference of static exposure under different postures was greater in males than in females. Furthermore, orthodontic bracket, maxillary surgery, maxillary movement direction, and age had no effect on the difference of static teeth exposure in different postures.

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比较正颌外科手术患者不同姿势下的静态牙齿暴露及其影响因素。
研究目的本研究旨在探讨正颌手术患者在不同姿势下牙齿静态暴露的差异和影响因素:方法:共收集了 148 名正颌手术前后的患者。方法:共收集了 148 名正颌手术前后的患者,分别在直立位和仰卧位拍摄照片,测量静态牙齿暴露值,比较不同体位下的差异是否具有统计学意义。根据性别、有无正畸托槽、测量时间(术前或术后)和上颌运动方向(向前或向后)对患者进行分类,并比较静态牙齿暴露的差异。结果:两种体位的静态牙齿暴露差异为 0.99 mm±0.95 mm,差异有统计学意义(P=0.000)。女性和男性的静态暴露差异有统计学意义(P0.05)。正畸托槽、术前或术后时间点以及上颌运动方向之间的静态暴露差异无统计学差异。此外,牙齿静态暴露的差异与年龄之间没有发现明显的相关性(r=-0.087,P=0.291):结论:与直立位相比,仰卧位的牙齿静态暴露增加了约 0.99 毫米。男性在不同姿势下的静态暴露差异大于女性。此外,正畸托槽、上颌手术、上颌运动方向和年龄对不同姿势下牙齿静态暴露的差异没有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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