减数矫治中个体直丝托槽定位值的测量研究  

Study of Bracket Placement with the Preadjusted Appliance for Extraction Cases

作　　者：刘东旭[1] 王春玲[1] 岳建荣 张晓艳[1] 

机构地区：[1]山东医科大学附属口腔医院,山东250012 [2]山东德州水电部十三局医院口腔科,山东253000

出　　处：《上海口腔医学》2000年第3期141-142,共2页Shanghai Journal of Stomatology

摘　　要：目的　建立拔牙病例个体直丝托槽定位值。方法　选择拔除上下双尖牙、矫治后符合Andrews正常牙合的6 0例患者 ,男女各 30例 ,平均年龄 13.5岁。直丝托槽在上下切牙部均位于临床牙冠中点 ,且矫正保持弓丝不含任何第二序列弯曲。于患者口腔内用Dougherty托槽定位器测量每一牙齿切缘或牙合缘至托槽中心的距离 ,并将以上数据按最近 0 5mm舍入作数值修正 ,得出托槽定位的均值 ,将其上下移动 0 .5mm和 1.0mm (第二磨牙除外 ) ,建立适合拔牙病例的个体直丝托槽定位值。结果　直丝托槽位置在第二双尖牙、第一磨牙处 ,拔牙病例与非拔牙病例托槽的垂直就位高度存在一定差异。结论　本研究建立的拔牙病例个体直丝托槽定位值 ,有利于邻牙良好咬合关系的建立 。Objective To determine the bracket placement with the preadjusted appliance for extraction cases. Methods Sixty finishing occlusions were chosen as Andrews stated at debonding .The placement of the incisor teeth bracket was in the middle of the clinical crown, and retention arch wire was straight wire without step bends. The measurement from the incisal or occlusal edges to the bracket center was the height of the placement of the bracket. In order to produce bracket placement chart, the values of measurements +0.5mm and +1.0mm were added for larger teeth, and -0.5mm and -1.0 mm for smaller teeth. Results The placement in the second bicuspid and first molar was different between extraction cases and nonextraction cases. Conclusion The bracket placement chart improves the accuracy of bracket placement with the preadjusted appliance for extraction cases.

关 键 词：直丝弓矫治器 托槽位置 减数矫治 方法学 

分 类 号：R783.6[医药卫生—口腔医学]