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1、大連醫(yī)科大學(xué)碩士學(xué)位論文口牙根均未見明顯吸收。x線頭顱側(cè)位片測量結(jié)果顯示:SNA、SNB未見明顯變化:FMA減小3.3。,MP—SN減小4。,說明下頜平面逆時(shí)針方向旋轉(zhuǎn);N-ANS增加了4mm,ANS~Me/N—Me增加了1.6%,達(dá)到正常范圍內(nèi)。Co-Po增加了3mm,后面高增加了8mm,前面高增加2mm,面高比增加10%,達(dá)正常范圍內(nèi);u卜sN。增加7.4。、U1-NA。增加5.3。、U1一NA距減小0.7mm,L1-NB。減少6.3。、L1一NB距減小2.2mm,說明上前牙唇傾度增加,下前牙唇傾度減??;z角由63。
2、增大到65.6。,H角由18。減小到14.6。,說明下面部側(cè)貌得到改善;ULEP減小4mm、LLEP減小2mm,上下唇均得到有效回收。AsUL—FH增加10。,PosBs—FH增大10.4。,頦唇關(guān)系趨于協(xié)調(diào)。Wits值由一2mm增加到Omm,上下頜關(guān)系更加協(xié)調(diào)。結(jié)論:在青少年高角骨性II類患者的矯治中,拔除四顆第+前磨牙,采用Nance弓+TPA加強(qiáng)上頜支抗,頭帽J鉤關(guān)閉間隙并進(jìn)行垂直向控制,最終能達(dá)到較好的咬合關(guān)系,得到良好的側(cè)貌。關(guān)鍵詞:骨性Ⅱ類高角支抗拔除第一前磨牙2查堡墨型奎堂堡±堂竺笙苧一———-——————
3、—————————-———————,——————————_————_—————————一——TheTreatmentofalladolescentPatientwithaHighangleSkeletalClassIIMalocclusionMasterdegreecandidate:FengYuqiSupervisor:ProfessorQuHongMajor:MasterofStomatologyAbstractObjective:Toinvestigatethetreatmentresultoffourfirstp
4、remolareX仃actlo瑪snDnga∞homgedevicesaSNance,TPAandJhookheadgearinSkelemlClassIImalocclusionadolescentpatientswithhighangle.Method:0neadolescentpatienttreatedatDafianDoctor’sDentalClinicinthevearof2010wasrecruitedintothestudy.Fermi,10yearsand3monthsold,SkeletalClas
5、slI.highangle.Convexprofile,retrudedmandible,extramentalismu8cbs廿amandsnlalln磚nt01a_bialsulcus.Shehadnormalmaxilla,mandibledeficiency4mmove—etaladlmmoverbite.Abnormalpositionofleftlateralincisor,eruptingleftmcisorsal】dleftsecondrmndiblepremolar,ClassImolarrelatio
6、nsh譯andClasslIcaninerelationship,lmmSpeedepthand2mmshiftedmaxillarymidlinetotheright·FollrfirstDremolarswereextractedandfixedappliancewasbondedinthiscase.Nal:)ceandTPAwereusedtOmaintainthelengthofupperarchandsprmgalsousedtogamspace.JheokwaSappfiedtoffloveincisors
7、backwardandClassIIelasticappliedforamoreproperintermaxillaryrelationship.Cephalometriccomp盯180nwasanaly8edbetweenthebeginningandtheendofexperiment.ResIdts:Tbetreatmentdurationwas34months.Dentitionwasproperlyalignedandleveled.Agoodanteroposteriorrelationshipwasach
8、ievedwitha3mmoverjeta耐2mmoverb“e.Therewasnocrowdingandthemolarandcaninerelationshipwelx3bothclassI.Comparisonbetweenthepretreatmentandtheposttreatmentpanoranuc