中华口腔医学研究杂志(电子版) ›› 2014, Vol. 8 ›› Issue (02) : 149 -154. doi: 10.3877/cma.j.issn.1674-1366.2014.02.013 × 扫一扫
经验交流
收稿日期:
出版日期:
通信作者:
Qi Chen1, Zhihui Mai1, Zheng Chen1, Lin Chen1, Hong Ai1,†()
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Corresponding author:
陈奇, 麦志辉, 陈正, 陈琳, 艾虹. 双钥匙曲应用于上颌骨性前突病例初探[J/OL]. 中华口腔医学研究杂志(电子版), 2014, 8(02): 149-154.
Qi Chen, Zhihui Mai, Zheng Chen, Lin Chen, Hong Ai. A pilot study of double keyhole loops in skeletal maxillary protrusion cases[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2014, 8(02): 149-154.
目的
探讨上颌骨性前突病例应用双钥匙曲内收上前牙的临床疗效。
方法
对采用双钥匙曲关闭上颌拔牙间隙的18 例上颌骨性前突完成病例,分别进行治疗前后的软组织侧貌分析和侧位片X 线头影测量分析,其结果进行配对t 检验。
结果
所有病例拔牙间隙关闭效果均良好,关闭速度平均为每个月1.2 mm,治疗后SNA 角、A 点凸度及上唇突度较治疗前明显减小(t=2.547,P<0.05),治疗后上切牙角均达到或保持正常。
结论
使用双钥匙曲内收上前牙时,在使上前牙远中移动的同时,能很好的控制上前牙的转矩及垂直向位置,可以获得上前牙整体内收的效果,对于前牙唇倾不明显、直立或舌倾的上颌骨性前突拔牙病例具有临床推广价值。
Objectives
To evaluate the treatment outcome of double keyhole loops in skeletal maxillary protrusion cases.
Methods
Eighteen finished cases with skeletal maxillary protrusion were chosen. Lateral cephalometric radiographs were taken and cephalometric analysis were done for them all before and after treatment. Data were analyzed by using paired t-test.
Results
The extraction space was closed effectively in all cases. The space was closed by 1.2 mm/month in average. After treatment, the SNA angle, A point protrusion and upper lip protrusion were significantly reduced than before (t=2.547,P<0.05). The normal inclination of upper incisors was achieved.
Conclusions
By using double keyhole loops, the close extraction space could be closed effectively with the good control of the troque and the vertical position of anterior teeth. In another word, bodily movement of the upper incisors can be achieved with double keyhole loops.