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目的探讨微种植体矫治第二恒磨牙正锁的疗效。方法选择第二磨牙正锁病例9例,男7例,女2例,年龄18~32岁,平均22.5岁。在锁牙的颊侧及上颌腭侧植入微种植体,链状皮圈牵引竖直、压低倾斜的第二磨牙。对正锁磨牙治疗前后的CBCT进行测量、分析。结果微种植体牵引矫治正锁平均疗程4个月。三维测量结果:U7j-矢状面减小、L7j-矢状面增加,P<0.05,有显著差异,表明患侧正锁上下磨牙的牙弓宽度恢复;U7-SN增加,L7-SN减小,P<0.05,有明显差异,说明正锁磨牙的牙轴恢复正常。结论微种植体用于纠正磨牙正锁,针对锁发生的机制进行矫治,矫治锁牙颊舌向异常的同时纠正了高度异常,疗程短、疗效好。
Objective To investigate the curative effect of micro-implants for correction of the second permanent molars. Methods The second molars were locked in 9 cases, 7 males and 2 females, aged 18 to 32 years old, average 22.5 years old. Micro-implants are implanted on the buccal and maxillary palatal sides of the locking fangs. The chain-like apron pulls the vertical, lower, inclined second molar. The CBCT before and after locking molars treatment was measured and analyzed. Results micro-implant traction correction is the average duration of lock 4 4 months. Three-dimensional measurement results: U7j-sagittal plane reduced, L7j-sagittal plane increased, P <0.05, there was a significant difference, indicating that the ipsilateral sagittal upper and lower dental arch width recovery; U7-SN increased, L7- Small, P <0.05, there are significant differences, indicating that the mandibular molar teeth are back to normal. Conclusion The micro-implants are used to correct molars, and to correct the mechanism of occlusion, to correct the anomalies of buccal and lingual tremors, and to correct the abnormalities, short courses and good curative effect.