双钥匙曲近中移动第一磨牙的临床应用
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摘要
目的:探讨运用双钥匙曲近中移动下颌第一磨牙纠正Ⅱ类错畸形的临床效果。方法:选择安氏Ⅱ类错畸形,需拔除下颌第二前磨牙、近中移动下颌第一磨牙以改善颌位关系的患者16例,年龄14~25岁。拔牙间隙处牙槽嵴高度和宽度均正常,运用双钥匙曲近中移动第一磨牙。结果:16例病例均实现下颌第一磨牙整体移动,无近中倾斜,无升高,第一磨牙与第一前磨牙接触关系良好,间隙完全关闭。结论:运用双钥匙曲矫治技术近中移动第一磨牙的临床效果稳定并能够实现整体移动。
Objective: To evaluate the treatment outcome of double keyhole loops in moving mandibular first molar forward,which to correct the Angle Class Ⅱ disorder. Methods: Sixteen Class Ⅱ patients aged from 14-25 years were chosen,that all the lower second premolars of these cases were extracted with average fine height and width of bone in the extraction spot. Double keyhole loops were used to move the mandibular molars forward in order to correct distal molar relationship.Lateral cephalometric radiographs were taken and cephalometric analysis were done before and after treatment. Data were analyzed by using pairedt-test. Results: All the lower molars moved forward bodily with no inclination or elevation,and extraction spaces were closed with satisfied contact area between lower first premolars and first molars. Conclusion: It is efficient to use double keyhole loops in moving the distal first molar forward bodily.
Objective: To evaluate the treatment outcome of double keyhole loops in moving mandibular first molar forward,which to correct the Angle Class Ⅱ disorder. Methods: Sixteen Class Ⅱ patients aged from 14-25 years were chosen,that all the lower second premolars of these cases were extracted with average fine height and width of bone in the extraction spot. Double keyhole loops were used to move the mandibular molars forward in order to correct distal molar relationship.Lateral cephalometric radiographs were taken and cephalometric analysis were done before and after treatment. Data were analyzed by using pairedt-test. Results: All the lower molars moved forward bodily with no inclination or elevation,and extraction spaces were closed with satisfied contact area between lower first premolars and first molars. Conclusion: It is efficient to use double keyhole loops in moving the distal first molar forward bodily.
引文
[1]傅民魁,林久祥.口腔正畸学[M].第2版.北京:北京大学医学出版社.2014.229-231.
[2]傅民魁.口腔正畸学[M].第5版.北京:人民卫生出版社.2007.73-82.
[3]Roth RH.Comment on Roth appliance[J].Am J Orthod Dentofacial othop,1993,104(4):24-25.
[4]Frank C,Nicolai RJ.A comparative study of frictional resistances between orthodontic bracket and arch wire[J].An J Orthod,1980,78(6):593-609.
[5]Nanda R.Biomechanics in clinical orthodontics[M].Philadelphia:WB Saunders Company,1997.188-217.
[6]Drescher D,Bourauel C,Schumacher H.Frictional forces between bracket and arch wire[J].Am J Orthod Dentofacial Orthop,1989,96(5):397.
[7]陈奇,麦志辉,陈正,等.双钥匙曲应用于上颌骨性前突病例初探[J].中华口腔医学研究杂志(电子版),2014,8(2):149-154.
[8]Kim HK,Park YG.A cephalometric study on tooth movement pattern of maxillary 6 anteriors with double keyhole loops[J].Korean J Orthodontics,2002,32(1):9-18.
[9]William R Proffit,Henry W Fields,David M Sarver.傅民魁,译.当代口腔正畸学[M].第5版.北京:人民军医出版社.2014.321.
[10]张京剧,曹阳,陈扬熙,等.正畸关闭第一恒磨牙缺失间隙的支抗控制[J].实用口腔医学杂志,2003,19(4):393-393.
[11]刘月华,傅民魁,曾祥龙.直丝弓矫治技术系列讲座(四)(第二阶段:覆盖与磨牙关系矫正)[J].中华口腔正畸学杂志,1996,3(4):180-183.
[2]傅民魁.口腔正畸学[M].第5版.北京:人民卫生出版社.2007.73-82.
[3]Roth RH.Comment on Roth appliance[J].Am J Orthod Dentofacial othop,1993,104(4):24-25.
[4]Frank C,Nicolai RJ.A comparative study of frictional resistances between orthodontic bracket and arch wire[J].An J Orthod,1980,78(6):593-609.
[5]Nanda R.Biomechanics in clinical orthodontics[M].Philadelphia:WB Saunders Company,1997.188-217.
[6]Drescher D,Bourauel C,Schumacher H.Frictional forces between bracket and arch wire[J].Am J Orthod Dentofacial Orthop,1989,96(5):397.
[7]陈奇,麦志辉,陈正,等.双钥匙曲应用于上颌骨性前突病例初探[J].中华口腔医学研究杂志(电子版),2014,8(2):149-154.
[8]Kim HK,Park YG.A cephalometric study on tooth movement pattern of maxillary 6 anteriors with double keyhole loops[J].Korean J Orthodontics,2002,32(1):9-18.
[9]William R Proffit,Henry W Fields,David M Sarver.傅民魁,译.当代口腔正畸学[M].第5版.北京:人民军医出版社.2014.321.
[10]张京剧,曹阳,陈扬熙,等.正畸关闭第一恒磨牙缺失间隙的支抗控制[J].实用口腔医学杂志,2003,19(4):393-393.
[11]刘月华,傅民魁,曾祥龙.直丝弓矫治技术系列讲座(四)(第二阶段:覆盖与磨牙关系矫正)[J].中华口腔正畸学杂志,1996,3(4):180-183.