摘要
目的评价改良反式TwinBlock联合前牵矫治安氏Ⅲ类骨性错牙合的临床效果及稳定性。方法应用改良反式TwinBlock联合前牵矫治替牙期安氏Ⅲ类骨性错牙合15例,对矫治前后、矫治后一年患者头颅侧位片硬组织测量结果进行分析,评价矫治的效果和矫治结束后一年的稳定性。结果矫治刚结束覆盖平均增加5.41mm,SNA角平均增加2.23°,ANB角平均增加3.18°,SNB角平均减小2.28°,SL平均减小6.57mm,SE平均增加4.92mm。矫治结束后一年与矫治前比较覆盖平均增加4.21mm,SNA角平均增加3.24°,ANB角平均增加3.69°,SL平均减小3.87mm,OPSN角平均增加3.02°,GoGnSN平均增加2.47°。结论改良反式TwinBlock联合前牵对替牙期安氏Ⅲ类错牙合的矫治有明显的效果,可促进上颌骨发育,使下颌后退,反覆盖反覆牙合能在6～7个月内纠正。但矫治结束后不能完全控制下颌骨的遗传性过度生长,导致矫治后一年覆盖有少量减少,下颌骨颏前点仍向前下方向生长。从而提示安氏Ⅲ类错牙合的长期随访与控制是非常必要的。
Objective To evaluate the treatment effect and stability of Twin-Block appliance （TBA） combined with maxillary protraction appliance （MPA）, that was applied for class Ⅲ malocclusion. Methods TBA combined MPA was used in 15 class Ⅲ malocclusion cases of mixed dentition. The changes of hard tissue were compared with before treatment, after treatment and after one-year post treatment period. Results After treatment the average overjet increased 5.41 mm, the average SNA increased 2. 23°, the average ANB increased 3. 18°, the average SNB decreased 2. 28°, the average SL decreased 6.57 mm, and the average SE increased 4. 92 mm. After one year post treatment the average overjet, SNA, ANB, OP-SN, GoSn-SN increased, and the average SL decreased 3.87 ram. Conclusion By applying TBA combined MPA on class Ⅲ malocclusion patients in mixed dentition could accelerate the development of the maxillary bone structure, and mandible receded backward. But the mandible＇s forward growth was beyond control after one-year post treatment.
出处
《福建医药杂志》
CAS
2005年第6期1-3,共3页
Fujian Medical Journal
