不同骨面型患者颏部形态的x线头影测量分析

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1、浙江大学硕士学位论文AbstraetMethods：Lateralcephalometricradiographsof174individuals(81malesand93females)withallagerangeof12——30yearswereselectedanddistributedaccordingtotendenceofskeletalfacialpattern(63ClassI，61ClassII，and50ClassIII)．Eachradiographwasanalyzedandmeasuredtode

2、terminetheprofileandmorphometricofthechin．Threeangularandfivelinearmeasurementswereconstructedforthemorphometricchinanalysis．One—wayanalysisofvarianceWasperformedtostudytherelationshipamonggender，ageandskeletaltypeandamultiplecomparisontestwasusedtofurtherdistingui

3、shwhichskeletalpatterntendencesuggestedsignificantdifferenceinintrocessionofthementalregion．RegressionanalysisWasalsousedtotesttheinterrelationshipofthevariablesofgender，age，andskeletaltype；withthelinearmeasurementsofthechin(significanceWascalculatedatthe0．05level)

4、．Results：Theresultsindicatethattheprofileofchinpresentedwithprominentprofileinthemajorityofindex(70％)，regardlessofgender，age，orskeletaltype．Thesignificantdifferencesexistedbetweenheightofchinandgenders，theaverageheightofchinformaleswas32．443+3．063mm，whilefemale30．5

5、42+2．230mm．WhenageWasevaluated，significantdifferencesinheightofchinwasfoundbetweentheolder(17yearsormore)andtheyounger(12—15years)agegroups(P

6、anthatintheyoungeragegroup．Whenskeletaltypewascomparedwithmentalregion，asignificantdifferencewasfoundintheintrocessionofchinbetweentheClassIIandClassIIIsubjects(尸<0．05)．IntrocessionofhardtissueandsofttissueinClassIIgroupwere2．8964-0．672mmand4．517+1．229mm，while2．432

7、+0．865mmand4．1144-1．246mminClassIIIgroup．Ifgender，age，andskeletaltypewereallcomparedwithregressionanalyses，theresultrevealedthatageWassignificantlyrelatedtoachangeofintrocessionofhardandsoRtissue(P

8、inmorphology，differenceemergedinfactorofgender，age，andskeletalfacialpattern，whichdeservestobetakenintoconsiderationinorthodontictreatmentplanning