安氏ⅱ类亚类错（牙合）成人患者牙颌对称性的cbct分析

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1、英文摘要AssessmentofmandibularanddentalasymmetriesofClassⅡsubdivisionmalocclusionswithcone·-beamcomputedtomographyABSTRACTobjeetives：AccordingtoAngle’Sclassificationsystem，theClassIIsubdivisionmalocclusionhasoneClassImolarrelationshipsideandClassIIontheother．Relationaltreatmentplanninghasbee

2、nessentialandchallenging．Thus，dysisofthedocclusi,facilitateclinicalcnallengmgbusaccurateanalysisofthemalocclusioncanfacilitateclinical，treatmentplanning．ThisstudyaimtoanalyzemandibularanddentalasymmetryofadultswithClassIIsubdivisionmalocclusions，bycomparingwithnormal-occlusionsubjectsusi

3、ngcone—beamcomputedtomography．Methods：Thesubjectsweredividedintotwogroups．ThirtyadultpatientswithAngleClassIIsubdivisionmalocclusions(18male，12female，averageage，24．6years)wereselectedfromthosewhosoughtorthodontictreatmentattheOrthodonticDepartmentinHospitalofStomatology,HebeiMedicalUnive

4、rsity,fromOctober201toOctober2013，asClassIIsub—divisiongroup．Thirtyvolunteerswithnormalocclusions(9male，21female，averageage，21．5years)werechosenfromthestudentsofHebeiMedicalUniversityasnormalocclusiongroup．Alltheindividualswereinformedofthestudyandagreedtoparticipate．Pre·treatmentCBCTsca

5、nswereobtainedintheintercuspalposition(IcP)．Therawdatawassavedasdigitalimagingandcommunicationsinmedicine(DICOM)filesandimportedintoInvivosoftware．Skeletalanddentallandmarksweresetonthe3Dreconstructedmodelstoconductlinearandanglemeasurementsinmaxillaryandmandibulardentitionandmandible．Th

6、elandmarksare：maxillarydentalmidpoint，incisiveforamenpoint，maxillarymolarpoint，mandibulardentalmidpoint，mandibularmolarpoint，condylarvertex，gonionpoint，mentonpoint，andcondylarmidpoint．Basedonthesepoints，severallinearandanglemeasurementswereconductedtoset4英文摘要variablesusedtoassesstheasymm

7、etry．StatisficalanalysiswasmadewithSPSS13．0software．SignificancelevelwassetatO．05．Results：1InClassIIsubdivisiongroup，caseswith@onlymandibulardentalmidlinedeviated，②onlymaxillarydentalmidlinedeviated，and③bothmidlinesdeviated，accountfor60％(18cases)，23％(7cases)and17％(5cases)