安氏ⅱ2类错（牙合）软硬组织与生长发育特征的分析

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1、硕士学位论文英文摘要softtissuesofAngleClassIIDivision2malocclusionanditsgrowthpattem．Reslut：1．ThecomparativeresultsofhardtissueofAngleClassIIDivision2malocclusion：Themaxillaisorthognathic，thecomparativeresultsofANB、AB-NPg、NA-APgandA-NPgshowedaClassIIskeletalpatteminthesagittaldirection，themandibleoftheear

2、lypermanentdentitionsubgroupshowedrelativlynormalpositionandsize，whilethepermanentdentitionsubgroupshowedanretrognathicandshortmandible；Theverticalskeletalparametersofbothagesubgroupsshowedaflatmandibularplane，anacutegonialangle，thedecreasedanteriorfacialandlowerfacialheight，anincreasedratioofan

3、teroposteriorfacialheightcomparingwiththecontrolgroups；Therewasnodifferenceinthebasicranialparameterscomparingwiththecontrolgroups．Thedentoalveolarparametersshowedapronouncedretroclinationoftheuppercentralincisors，anobtuseinterincisalangle，deepoverbite，nooveruptionbothoftheupperandlowerincisors，

4、thelowerincisorswerelingualintheearlypermanentdentitionsubgroup，whilethepermanentdentitionsubgroupshowedanormalIMPA．2．ThecomparativeresultsofsoRtissueofAngleClassIIDivision2malocclusion：BothagesubgroupsshowedafacialconvexityanglebetweentheClassIandClassIIDivision1malocclusions，noobviousdifferenc

5、einsofttissuefacialanglecomparingwiththeClassIV硕士学位论文英文摘要malocclusion，amoreposteriordistancebetweenthelipsandtheEline，anobtusernasolabialanglecomparingwiththeClassIIdivision1malocclusion，anincreaseddistancebetweenmentolabialsulcusandtheHline，amorecoveredupperincisalcrownbythelowerlip，nolengthdis

6、crepancybetweentheupperlipandthelowerlipcomparingwiththecontrolgroups．3．ThecomparativeresultsofagesubgroupsinAngleClassIIDivision2malocclusion：Thepermanentdentitionsubgroupshowedanincreasedconvexity(distanceandangle)andANB，asmallerSNBandSNPg，anincreaseddistancebetweenthelowercentralincisorsandth

7、efacialalsoNBplane，therewasnoobviousdifferenceinverticalskeletal，basicranial，dentoalveolarheightandsofttissueparametersbetweenthetwoagesubgroups．Conclusion：1．ThecharacteristicsofhardtissueofAngleClassIIDivision2malocclusion：