摘要
目的:通过X线头影测量分析,比较反式Twin-Block和Frankel-Ⅲ功能矫治器治疗生长发育期安氏Ⅲ类错的作用机制。方法:选择替牙期、恒牙早期安氏Ⅲ类错患者20例(男9例,女11例),平均年龄11岁2个月,随机分为T、F2组,每组各10例患者,T组采用反式Twin-Block矫治器矫治,F组采用Frankel-Ⅲ矫治器矫治。全天戴用矫治器治疗4～11个月。分别对治疗前后头颅侧位定位片进行分析比较。结果:2组下颌骨位置均后移,稳定在治疗前的下颌后退位处(P>0.05);2组上颌骨长度及突度均增加,F组效果优于T组(P<0.05);F组有明显的牙齿代偿性移动(P<0.01);T组的平均疗程6.5个月,F组为9个月。结论:2种功能矫治器均能有效的使下颌后退矫治生长发育期安氏Ⅲ类错。Frankel-Ⅲ对上颌的作用大于反式Twin-Block,反式Twin-Block的治疗时间明显短于Frankel-Ⅲ。
Objective： To assess the effect and mechanism of Class HI malocclusions treatment with Frankel- llI appliance and reverse Twin- block appliance. Methods ：Twenty subjects of Class Ⅲ maloeclusion were included in this study（9 males, 11 females）. Among them, 10 subjects were randomly selected for treatment with reverse Twin-block appliance （T group） and 10 subjects for Frankel-Ⅲ appliance （ F group）. All patients were treated all the day for total of 4 - 11 months. The cephalometric records of these subjects were examined before and after treatment. The acquired data were processed with SPSS 10.0. Results： The resu]ts showed a mandible re- ceded backward in both grnups. Both group could accelerate the development of the maxillary bone. But the Frankel- Ⅲ was more effective. F group had significant effects of uprighting upper frontal teeth and flaring lower teeth, the average treatment time was 6.5 months in reverse twin-block appliance therapy group and 9 months in Frankel-m appliance group. Conclusion： Both reverse Twinblock appliance and Frankel- Ⅲ appliance can treat angle class m malocclusions effectively. The effects of maxillary changes of Frankel- Ⅲ appliance is better than reverse Twin-Block. Treatment period is shorter in T group than in F group.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2010年第2期236-239,共4页
Journal of Practical Stomatology
