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1、骨性II类下颌后缩儿童经Herbst矫治器治疗后软组织变化研究骨性TT类下颌后缩儿童经Herbst矫治器治疗后软组织变化研究[摘要]目的:探讨Herbst矫治器治疗对生长发育期儿童软组织侧貌的影响。方法:本研究选取17例生长发育期骨性II类下颌后缩儿童作为研究对象,采用国产Herbst矫治器进行矫治,并以10例未经治疗的生长发育期骨性TT类下颌后缩儿童作为对照。结果:经Herbst矫治器治疗后,软组织侧貌发生明显改变,面突度减小,代表下颌突度的下唇基角(S-Nz-Si),T唇角(LiSi-SN),软组织亥页突角(S-N‘-Pg,)显著增大,H角减小,差异有显著性(P
2、<0.05),代表上下唇矢状关系的上下唇基角(Sn-N^-Si)显著减小,同时亥页唇沟深度(Si-LiPgz)显著减小;但代表上颌突度的上唇基角(S-Nz-Sn)及上唇角(LsSn-SN)在治疗前后无明显变化。结论:Herbst矫治器的治疗促进了下面部软组织的生长,利于面型的改善,但亥页唇沟厚度(Si-B)的显著减少,提示硬软组织改建的不一致性。[关键词]Herbst矫治器;下颌后缩;头影测量;侧貌[中图分类号1R783.5[文献标识码]A[文章编号]1008-6455(2010)06-0885-03Facialprofilechangesofherbstappli
3、ancetherapyongrowingchi1drenwithclassTTdivision1malocclusionandmandibularretrusionLTUJian-linl,ZHOUHui-xia2,YUTao2,WANFChao2,DATJuan2(1.DepartmentofOrthodontics,theSecondShenzhenTCMHospitai,Shenzhen530034,Guangdong,China;2.DepartmentofOrthodontics,StomatologicalCol1ege,FourthMilitaryMe
4、dicalUniversity)Abstract:0bjectiveToinvestigatetheinfluenceofHerbsttherapyonfacialprofile.MethodsThematerialconsistedof27skeletalClassIIcases,ofwhich17weretreatedwiththedomesticHerbstapplianceandtheother10casesservedascontrol.ResultsAfter6~8months(average7months)ofHerbstappliancetherap
5、y,ClassIImalocclusalrelationshipswerecorrectedtoClassIocclusalrelationships.Herbstappliancetherapybroughtaboutareductionofthefacialsofttissueprofileconvexity.Upperlipbaseangular(S-N'-Sn),upperlipangular(LsSn-SN)remainedunchangedbeforeandaftertreatment.Lowerlipbaseangular(S-N'-Si),lower
6、lipangular(LiSi-SN),softtissuementalangular(S-N?-Pg')increasedandHangular,upperlowerlipbaseangular(Sn-N'-Si)andmentalabialsulcusdepthdecreased.ConclusionltshowedthatHerbstappliancetreatmentstimulatedgrowthoflowerfacialsofttissueandwasbeneficialtoreducefacialconvexity.However,decreaseof
7、mentalabialsulcusthicknesssuggestedthemodificationofsofttissuefellbehindskeletalgrowth.Keywords:herbstappliance;mandibu1arretrusion;cephalometry;facialprofileHerbst矫治器是一种经典的固定功能矫治器,患者可以24h持续戴用,能获得较为满意的临床效果。本实验拟通过头影测量了解治疗前后软组织的改建情况,以进一•步探讨Herbst矫治器改善患儿侧貌的作用机制。1材料和方法1.1临床资料:本研究选取27例(男1