玻璃离子牙合垫矫治安氏II类2分类错牙合的临床研究(1)
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[摘要]目的：探讨后牙玻璃离子牙合垫配合固定矫治器矫治安氏II类2分类错牙合打开咬合的机制及临床使用要点。方法：选择安氏II类2分类错牙合患者30例，实验组15例采用后牙玻璃离子牙合垫加固定矫治器，对照组15名采用上颌前牙平面导板加固定矫治器。X线头影测量分析比较患者矫治前后的变化。结果：X线头影测量结果分析显示实验组和对照组ANS-Me(mm)、N-Me(mm)、S-Go(mm)、U6-PP(mm)、L6-MP(mm)、U1/SN(°)、L1/MP(°)增大，而U1-PP(mm)、U1/L1(°)、Overbite (mm)减小，差异均有统计学意义，说明前后面高增加，上下后牙伸长，上前牙压低，上下前牙唇倾。两组相比，除U1/SN、L1/MP、U1/L1外其余指标均无明显差异。结论：后牙玻璃离子牙合垫配合固定矫治器是治疗氏II类2分类错牙合简单有效的方法。
[关键词]后牙玻璃离子牙合垫；安氏II类2分类错牙合；头影测量
[中图分类号]R783.5 [文献标识码]A [文章编号]1008-6455(2011)03-0454-04
Clinical research of class ionomer cement occlusal pad intreatmentofClass II division 2 malocclusions
YAN Wen-feng1,LIU Zhi-jie2,ZHANG Miao-miao1
(1.Department of Orthodontics,Stomatology College,Harbin Medical University,Harbin 150001,Helongjiang,China;2.X-ray Department,Stomatology College,Harbin Medical University)
Abstract:ObjectiveTo study the mechanism and applicability of class ionomer cement occlusal pad of posterior teeth combined with fixed appliance in treatment of class II division 2 malocclusions.Methods30 cases of Angle class II division 2 malocclusionwere selected.15 patientswere treated with class ionomer cement occlusal pad combined with fixed appliance and 15 cases were as controls.Their cephalometry radiographs were measured and analyzed before and after treatment.ResultsIn both of groups，Anterior andposterior facialheight(S-Go,N-Me,ANS-Me) were increased. Labial incline in upper and lower incisors(U1-SN,L1-MP) and interincisa angle(U1-L1) were decreased.The posterior teeth(U6-PP,L6-MP) were extruded andtheupperincisors(U1-PP)were intruded.Theoverbite was decreased.Compared the two groups,in addition to U1/SN,L1/MP and U1/L1，the other indexes were all no statisticalvariances.Conclusion Class ionomer cement occlusal pad of posterior teeth with fixed appliance can be used effectively for class II division 2 malocclusion.
Key words:class ionomer cement occlusal pad of posterior teeth;Class II Division 2;malocclusion cephalometrics
安氏II类2分类错牙合是临床上常见的错牙合畸形，其发病率占错牙合畸形的8%[1-2]。其特点为磨牙远中关系，上切牙内倾呈闭锁性深覆牙合，影响患者的美观、口腔卫生与功能。矫治该类错牙合成功与否，在很大程度上取决于咬合打开的效果，过去常采用平面导板，但活动平面导板存在需要患者配合 ......
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