不同形态特征微种植体的生物力学-研究

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1、天津医科大学硕士学位论文AbstractobjectiveThefiniteelementmodelofmicro—implantanchorageandthemandiblewithhorizontaldirectionloadonthemicro—implantisestablishedtoanalyzetheimpactoftheloadonmicro—implantbonesegmentdiameter,pitchandthreaddepthandjawsurfacestressdistribution．Theresult

2、sareregardedasthereferencesandclinicalapplicationsforthedevelopmentofmicro-implant．ContentsandmethodsBasedonthemicro—implantanchoragegeometricformofAarhus68．75．87，themicro—implantthreadedissetas61TLrn，thenecksmoothheightas0．9mm，andthebonediameterofoutsegmentas2mrn．The

3、Pro／Esoftwareisusedtogeneratemicro—implantsandjawsimplifiedmodel，withthemicro—implants’diameterof10mmanditsheightof12mm．Theupperpartofthebasementissetasaportionofcorticalbonewith3intilthick，andtherestissetascancellousbone．Thenailroadisestablishedandthemodelmeshesarece

4、llaredviaimportingtheMicro--implant．．mandiblemodelinHypermesh．Afterwards，themicro—implant—mandiblemodelisimportedintoANSYS，applyingahorizontalforceof2009beforethecalculations．Results1．Withtheincreaseofthediameterinthemicro—implantbonesegment，thepeakvaluesofmicro-impla

5、nt—boneinterfacestressinclines，andtheprincipalstressesareconcentratedinthemicro·implantneckand6p，thestressismainlyconcentratedinthecorticalbone．Itcanbesawfrommicro—implantZaxisstressthatthepeakstressofmicro—implantisconcentratedinthepressureside．Therelationshipbetween

6、stressanddiameterisnotlinear．Theminimumandmostuniformstressdistributionappearsatthecaseof1．5ramdiameter．Itcanbesawfromthestressdistributionfigureonthemandiblesurfacethatthestressdistributionareaincreaseswithtlleincreaseinthediameterofthemicro-implant，butinthebonesegme

7、ntdiameterof1．5ramcase，thetrendarenotcoincidewithothercasesasthereiSnoobviousstressconcentrationZOne．2．Themicro—implantdistributionstresstrendhasnothingtodowithitspitch，TIT天津医科大学硕士学位论文一————————————————————————————————————————————————————一andmicro．implant．boneinterface

8、stressdistributionismoreconsistent．Thevaluesofs住essa】：ndisplacementofthecaseof0．5rampitcharebothrelativelysmall，withlittlefl