自攻型微钛钉支抗在矫治成人上颌前突中的临床应用

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1、自攻型微钛钉支抗在矫治成人上颌前突中的临床应用自攻型微钛钉支抗在矫治成人上颌前突中的临床应用［摘要］目的:探讨自攻型微钛钉矫治成人上颌前突的临床疗效。方法:应用自攻型微钛钉作为支抗矫治19例安氏II类1分类上颌前突成年患者，拔除双尖牙并排齐牙列后，微钛钉植入上颌第一恒磨牙和第二前磨牙颊侧,2周后以每侧1.0〜1.5N滑动内收前牙。通过前后X线头影测量分析，比较前牙内收情况和磨牙支抗的变化。结果：19例上颌前突均得到明显改善，切牙切缘平均内收7.49mm,切牙牙轴与SN交角平均减少17.94。，与NA交角平均减少12.46°，前牙

2、覆盖平均减少了7.4mm,上颌切牙治疗前后差异有统计学意义(P〈0・05)。上颌第一磨牙平均前移0.38mm,上颌第一磨牙治疗前后垂直向移动差异无统计学意义,94.7%种植体保持了稳定。结论：自攻型微钛钉能够有效治疗上颌前突成年患者，改善侧貌,起到强支抗的作用。［关键词］正畸支抗;上颌前突;安氏II类1分类；自攻型微钛钉［中图分类号JR783.5［文献标识码］A［文章编号］1008-6455(2010)03-0378-03Theclinicalapplicationofself-drilledtitanium-alloymini

3、screwasanchorageintreatingadultpatientswithmaxillaryprotrusionZHANGYing,ZHANGZe-biao,ZENGJin-biao,YANGChun-ling(DepartmentofStomatology,QuanzhouFirstHospital,FujianMedicalUniversity,Quanzhou362000,Fujian,China)Abstract:0bjectiveThepurposeofthisstudywastoevaluatethetr

4、eatmentresultsofadultpatientswithMaxillaryProtrusionbyusingself-drilledtitsniuni-aJloyminiscrewasanchorage・MethodsThestudycomprised19adultpatientsofAngeTsClassIIDivision1malocclusionandmaxillaryprotrusion.Afterpremolarsextraction,levelingandalignmentoftheremainingtee

5、th,self-drilledminiscrewswereimpantedinthebilateralbuccalalveolarbonebetweentheupperfirstmolarsandsecondpremolars・Theanteriorteethwereretractedtogetherbyusingmicroscrewsasanchoragewith1.0to1.5Nforceeachsideafter2weeks.AccordingtotheanalysisofcephalometricX-raysbefore

6、andafterorthodontictreatment,thealternationofanteriorteethretractionandmolars，anchoragewerecompared・ResultsThemaxillaryprotrusionof19caseswereimprovedsignificantly.Theedgesofincisorswereretractedby7.49mmataverage.TheanglebetweentheaxisofincisorandSNdecreased17.94°ata

7、verage・TheanglebetweentheaxisofincisorandNAdecreased12.46°ataverage.Theoverjetdecreased7.4mmataverage・Thedifferencesofincisorsbeforeandaftertreatmentwerestatisticallysignificant(P<0.05).Upperfirstmolarsmovedmesiallyby0.38mmataverage・Therewerenosignificantdifferencesi

8、nanteroposteriorandverticaldirectionsforupperfirstmolars・94.7%implantsremainedsteadythroughouttheorthodontictreatment・ConclusionThe