矯治力作用下牙周組織應力分布的研究及矯治曲對牙齒移動的控制.pdf

1、東南大學碩士學位論文矯治力作用下牙周組織應力分布的研究及矯治曲對牙齒移動的控制姓名：許文翠申請學位級別：碩士專業(yè)：材料加工工程指導教師：林萍華2002.3.1AbstractDuringthe0rthodonticstreatment，whentileforceproducedbyorlhodonticappliancesiSappliedtotilemalposedtooth，theperiodontaltissueiSremolda

2、ndalveolarmovefinallytOOthmovetoanewplaceTherefore，knowingaboutthepatternofstressdistributionofperiodontaltissuebyfiniteelementmethodcombinedwiththemechanicalb8haviorofappliancecarlhelpdentiststoinaketreatschemeaccuratel

3、y1nthispaper，afterthethreedimensionalfiniteelementofaJluppercentrallncisoranditSperiodontaltissuewasconstructedtoothwasappliedwithvariousloadsBythefiniteelementanalysis，thelawsofstressdistributionofthetoothanditsperiodon

4、taltissuewereshownThestresspatterninthetoothandalveolarwerecomplex，butthreekindofprincipalstressinperiodontalligamentareconsistentWhenthetoothmakethetippingmovementandcontrollingrootmovement，therewillbeahighstressconcent

5、rationatthecervicalleveloftheperiodontalligamentTiletranslationoftoothiSmoresuitableforthephysiologyneedbecausetoothandpet‘iodontalligamentshowtheloweranduniformstressIntiffsPaDcrtheeffectofalveolarbonelOSSonstresspatter

6、nandpositioncomparedwiththetooththathavehealthyalveolarbonearealsobestudiedItiSshownthestressoftoothanditsperiodontalligamentincreasewithincreasedbonebossforaconstantappliedforoe，whenthebonelOSSiSserious，theirstressincre

7、asedevidentlyItisalsoshownthatwhenboneiS10stitscenterofresistanceandcenterofrotationshiftedtowardtheapicaloftheroot，buttheirrelativepositiononthealveolarboneiSunchangedTheformerresultCanbeusedinpeculiaradultorthodonticsT

8、hispaperalsoputforwardsomeidealappliancestotreatacertainmalposedtoothonthebasisoftheknowingthecharacteristicoforthodontic：alloops，theusesoftheanchoragearealsostudiedKeywordsorthodonticsfiniteelementmethodalveolarboneloss