SUS2矫治器在恒牙牙合早期安氏Ⅱ类错牙合畸形正畸治疗中的应用分析
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[摘要]目的：分析SUS2矫治器在恒牙牙合早期安氏Ⅱ类错牙合治疗中的疗效及应用特点。方法：选择20例12～15岁以下颌后缩为主的骨性安氏Ⅱ类错牙合患者，应用SUS2与多托槽类固定矫治器联合治疗，对其治疗前后的头颅侧位片进行测量、统计分析。结果：20例患者矫治后侧貌改善明显，覆牙合、覆盖正常，磨牙关系为Ⅰ类。头影测量统计显示ANB、U1/SN、U1-NA、U6-PP、L1-MP、UL-E、OB、OJ在治疗后减小，差异有显著性，SNB、L1/MP、L1-NB、Co-Go、Co-Gn、Go-Po、U1-PP、L6-MP、LL-B'-Pos、在治疗后增大，有显著性差异。MP-SN、Y-axis在矫治前后无显著性变化。结论：SUS2矫治器与托槽类固定矫治器在恒牙牙合早期骨性安氏Ⅱ类错牙合治疗中联合应用能减小覆牙合、覆盖，矫正磨牙关系，并能较好地改善患者的面型。
[关键词]安氏Ⅱ类；SUS2矫治器；正畸治疗
[中图分类号]R783.5 [文献标识码]A [文章编号]1008-6455(2011)06-0974-04
Use of SUS2 appliance in orthodontic treatment of Angle II malocclusion at early stage of permanent dentition
WU Jian-hua,WANG Bin,ZHANG Yan-gen,HAN Xiao
(Department of Orthodontics,Hefei Stomatology Hospital,Hefei 230001,Anhui,China)
Abstract:Objective To analyze the curative effect and characteristics of SUS2 appliance in the orthodontic treatment of Angle II malocclusion at early stage of permanent dentition. Methods 20 cases of skeletal Angle II with mandibular deficiency,aged 12 to 15 years old, were selected. All the patients were treated with the combination of SUS2 appliance and bracket fixed appliance. Lateral cephalogram measurement was carried out before and after treatment,and the results were statistically analyzed.Results 20 patients achieved remarkable improvement in the profiles,normal overbite and overjet in teeth and Class I in molar relationship after treatment. The cephalometric analysis showed that ANB,U1/SN,U1-NA,U6-PP,L1-MP,UL-E,OB,OJ were decreased,while SNB,L1/MP,L1-NB,Co-Go,Co-Gn,Go-Po,U1-PP,L6-MP,LL-B'-Pos were increased after treatment,both with significant statistical difference. There was no significant change in MP-SN and Y-axis before and after treatment.Conclusion The combination use of SUS2 appliance and fixed appliance can be used efficiently in the orthodontic treatment of Angle II malocclusion at an early stage of permanent dentition because it can reduce overbite and overjet,correct molar relationship and improve the patients' facial outline.
Key words:Angle II;SUS2 appliance;orthodontic treatment
安氏Ⅱ类错牙合在我国恒牙期青少年中患病率为23%，其中约50%表现为下颌后缩[1]，磨牙为远中关系，伴有深覆盖、深覆牙合，对患者的美观与功能造成危害。对其治疗重点为下颌骨矢状向的改型，即功能性矫治下颌后缩。临床多选用双期治疗，即早期生长改良促进下颌发育、后期多托槽固定矫治器综合矫治。功能矫治多选用活动式功能矫治器如Twin-block或固定式功能矫治器如Herbst等。而SUS2与Forsus均属于推杆类功能矫治器 ......
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