【摘要】 目的 :观察摆形矫治器对牙弓长度、牙弓宽度及覆牙合覆盖的影响。方法 :选择 3 7例安氏Ⅱ类错牙合 ,Ⅰ～Ⅱ度拥挤的患者 ,应用摆形矫治器远移上颌第一磨牙 ,每一病例术前术后进行模型测量分析比较。结果 :3 7例患者在 18.2± 4.5周内双侧第一磨牙之间的牙弓弧形长度增加 (17.3 6± 4.3 8)mm ,伴牙弓前段宽 (-3 .0 4± 1.5 9)mm ,后段宽 (-1.2 9± 2 .0 1)mm的缩小 ,统计分析显示这些差异具有高度显著性。结论 :摆形矫治器是一种简便有效、对患者依赖少的上磨牙远移装置 ,但在临床应用中应注意牙弓的横向变化、上磨牙的旋转及支抗丢失更多还原

【Abstract】 objective: To evaluate the effects of the pendulum appliance on arch length, arch width, overbite and overjet. Methods: Pendulum appliances were applied for distalization of maxillary molars in 37 patients whith class Ⅱ malocclusion and 1-Ⅱ degree crowded dentition in upper dental arch. Pretreatment and posttreatment model analysis was conducted. Results: 37 patients treated for 18.2±4.5 weeks with pendulum appliance were accomplished . The increase of arch arc length between the maxillary first molars was (17.36±4.38) mm, the decrease of anterior arch width (-3.04±1.59) mm, and the decrease of posterior arch width (-1.29±2.01) mm . Differences between the pretreatment and posttreatment were significant, including arch arc length between the maxillary first molars ( P <0.001) and anterior arch width and posterior arch width ( P <0.01) . Conclusion: Pendulum appliance is a simple and effective molar distalization equipment.更多还原