摘要
目的:探讨从减数磨牙着手矫治牙颌面不对称畸形的特点及适应症。方法:通过减数磨牙矫治各类牙颌面不对称错患者共12例,男5例,女7例,平均年龄18.6岁。其中AngleⅢ类错7例,AngleⅡ类错3例,AngleⅠ类错2例;牙源性不对称3例,功能性不对称3例,混合性不对称6例。全部病例均采用直丝弓矫治器矫治,利用减数磨牙的间隙在长、宽、高三维方向上调整咬合关系,必要时辅以骨钉压低后牙。结果:全部病例矫治结束后均达到前牙正常覆覆盖,后牙中性或尖窝交错关系。牙颌面完全恢复对称者7例,偏斜明显改善者5例。疗程最短11个月,最长26个月,平均20个月。结论:在不对称畸形矫治中,减数磨牙在水平向缩窄下牙弓,垂直向去除问题磨牙和为压低磨牙提供间隙,矢状向为咬合调整提供大量有效间隙,并防止前牙内收过多而致舌倾并明确保留28个整齐健康的牙齿方面具有独到的优势。
Objective： Discussion characteristics and indications of treatment dentofacial asymmetry with molar extraction. Method：12 asymmetry cases were selected, 5 men and 7 women, age 13-25 years old, average 18.6 years old.They all treated with molar extraction. 7 cases of Angle Class Ⅲ, 3 cases of Angle Class Ⅱ, 2 cases of Angle Class Ⅰ. In etiolo- gy classification, 3 cases of odontogenic asymmetry, 3 cases of functional asymmetry, 6 cases of mixed asymmetry. All cases were using straight wire appliance treatment, using molar dimensions to adjust occlusal in three-dimensional.If necessary, bone screw would be used to pull down posterior teeth. Result： All patients attained normal occulusion and Angle Class I correlation. 7 cases fully recovered from Dentofacial symmetric and 5 cases obtained marked improvement. The shortest treatment time of 11 months, the longest continuous period of 26 months, an average of 20 months. Conclusion： Molar ex- traction have advantages of correction asymmetry in narrowing lower arch, providing spaces to correct problems in Perpen- dicular and sagittal and obtained 28 healthy teeth.
出处
《临床口腔医学杂志》
2009年第3期189-191,共3页
Journal of Clinical Stomatology
