上颌阻生尖牙的正畸治疗

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1、大连医科大学硕士学位论文关系。(3)矫治后23排入正常牙列，牙冠移动到牙槽骨中正常位置，与对侧正常萌出尖牙无差异，牙髓、牙龈、牙周健康，牙根没有明显吸收。(4)矫治过程中牵引23入列后，由于患者口腔卫生不佳，23唇侧牙龈轻度红肿，经牙周治疗后好转，牙龈炎症得到控制，牙龈形态正常。(5)患者整个矫治疗程20个月，自锁矫治技术相对缩短了埋伏牙治疗的疗程。结论：该病例通过改良型Nance弓作为支抗，成功牵引23入列，防止了左侧后牙前移占据拔牙间隙，减少了支抗丧失：通过拔除四颗第一前磨牙掩饰性治疗较好地改善了侧面貌，调整了磨牙关系及前牙唇倾度，解

2、除了拥挤；自锁矫治技术成功缩短了患者排齐牙列所需时间，节省了患者的时间成本，使患者矫治过程中更为舒适，是一种有效的正畸治疗埋伏阻生牙的方法。关键词：阻生尖牙正畸治疗改良型Nance弓白锁矫治2大连医科大学硕士学位论文OrthodonticTreatmentofMaxillaryImpactedCanineMasterdegreecandidate：Tang—HuiSupervisor：ProfessorZhang—GuirongVice--supervisor：AssociateprofessorJiang--XiaohongMajor：

3、StomatologyAbstractobjeetive：ToexploreinclinicalOrthodonticguidederuptiontreatmentofimpactedmaxillarycanines，tostudythecharacteristicsandeffectivedofthemaxillarycanineimpactiontreatment．Methods：A20yearoldHartfemalewithClassIIIandtheleftmaxillarycanineimpactionwassubdivisi

4、onmalocclusionpatientselectedasthesubject．Mandibularhyperplasiaandmaxillarynormal，theleftmaxillarycaninelowliptothedislocation，leftandrightsideofthemaxillarylateralincisorteethandtheleftmaxillaryfirstpremolarscrossbiteandpalatetothedislocation，theri出sidemolarClassIIIrelat

5、ionship，leftmolarneutralrelationship．ThecrowdingofMaxillaryarchis12．4nlrn，thecrowdingofmandibularis4．7ITllTI．ThepatienthadashallowoveIjetandoverbite，andhermaxillarydentalmidlinedevimed2mlntotheleftrelativetothefacialmidline．Inaccordancewiththecaninerootdevelopment，ambushs

6、ituations，clinicalexaminationandmedicalimaging，analysisofthepositionofthemaxillarycanines，impactedteethandhealthstatusofthehardandsofttissuesaroundandthemethodofsuitableforuse．UsefixedapplianceremovaloffourfirstpremolarstorelievecrowdingandmodifiedNancearchtotraction23imp

7、actedteethtonormaldentition．ItiStousetheplasticbaseofthemaxillaryanteriorpalate，alveolarridge，andthehardpalatemucosaasanchorage，useelasticrubberchainspeedoflightpermonthabout11Timtractionforce，theforceisabout609．Atthesametime，usetheGermanBioQuick3．0metalself-ligationbrack

8、ets，low-frictionself-ligationcorrectiontechnologyaligneddentition，levelingarch．Cephalometricfilm