Twin-block矫治器治疗安氏Ⅱ类错后牙和骨骼变化的研究  

Treatment Effects of Patients with Class Ⅱ Malocclusions Treated with Twin-Block Appliances

作　　者：徐学军[1] 黄吉娜[1] 张君超[1] 

机构地区：[1]浙江大学医学院附属口腔医院正畸科,杭州310006

出　　处：《口腔医学》2002年第4期187-189,共3页Stomatology

摘　　要：目的　通过X线头影测量分析 ,比较生长发育期安氏Ⅱ类Ⅰ分类错牙合患者用Twin block矫治器治疗后 ,牙和骨骼的变化。方法　选择 14例以下颌后缩为主的安氏Ⅱ类Ⅰ分类错牙合患者 ,年龄 10～ 12岁 ,后牙均为远中关系。全天戴用Twin block矫治器 9～ 12个月 ,测量治疗前后X线头颅定位侧位片 ,进行统计学分析。结果　ANB角减小 1 6 8°(P <0 0 1) ,Pg OLP增加 3 2 3mm(P <0 0 1) ,上切牙唇倾度 (ls NSL)减小 5 6 1°(P <0 0 1) ,下切牙唇倾度增加 2 96°(P <0 0 1) ,覆盖及磨牙位置关系均有显著差异 (P <0 0 1) ,腭平面角、牙合平面角、下颌平面角均未发生显著性改变。结论　Twin block矫治器用于早期以下颌功能性后缩为主的安氏Ⅱ类Ⅰ分类错牙合的功能性矫治 ,可取得明显的牙牙合骨骼的改变。Objective To evaluate the effects of Twin block appliances on the dentognathic systems of treating patients with Class Ⅱ Division Ⅰ malocclusions.Methods 14 patients aged 10～12 years old were treated with Twin block appliances for 9 12 months. Cephalograms were taken before and after treatment. An analysis of variance was performed on the (ephalogrphs).Results ANB angle was reduced by 1 68°( P <0 01),and Pg OLP was increased by 3 22mm( P <0 01). The inclination of upper incisor was reduced by 5 61°( P <0 01), and Ii ML was increased by 2 96°( P <0 01). The overjet and the relationship of the molars changed significantly. Platal plane, occlussal plane, and mandibular plane remained unchanged after treatment.Conclusion The Class Ⅱ correction with the Twin block appliance is achieved through normal growth besides mandibular skeletal and dentoalveolar changes.

关 键 词：安氏Ⅱ类错He TWIN-BLOCK矫治器 X线头影测量 

分 类 号：R781.5[医药卫生—口腔医学]