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目的:研究成人正畸治疗前后上前牙冠根比的变化情况。方法:选取我院治疗的41例接受正畸治疗的成年患者,并在治疗前后分算出中切牙、侧切牙、尖牙的牙根与牙槽嵴吸收量、冠根比。结果:中切牙、侧切牙、尖牙的牙根吸收量之间无明显差异;中切牙、侧切牙、尖牙的牙槽嵴吸收量之间无明显差异;治疗后中切牙、侧切牙、尖牙的冠根比与治疗前比较均明显上升。结论:成人在接受正畸治疗后可对上前牙有明显影响,可引起牙根与牙槽嵴吸收、增加冠根比,不过都在正常可接受范围内,说明临床治疗效果良好。
Objective: To study the changes of root-to-root ratio before and after orthodontic treatment in adults. Methods: A total of 41 adult patients undergoing orthodontic treatment were enrolled in this study. The root and alveolar ridge absorbance and root-crown ratio of central incisor, lateral incisor and canine were calculated before and after treatment. Results: There was no significant difference in the root resorption between the incisors, lateral incisors and canines. There was no significant difference in the root resorption between the incisors, lateral incisors and canines. The median incisors, lateral incisors , Canine crown-root ratio and before treatment were significantly increased. Conclusion: Adult can significantly influence the anterior teeth after orthodontic treatment, which can cause the root and alveolar ridge to absorb and increase the ratio of coronal and root, but they are all within the normal acceptable range, indicating that the clinical treatment effect is good.