micro-ct评价即刻负载对ss和ti微种植体周围组织的影响

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1、2内蒙古医科大学硕士研究生学位论文（2015）Effectofimmediateloadingontheperi-implanttissueofstainlesssteelandtitaniumalloymini-implants:AmicrocomputedtomographicanalysisAbstractObjective:Themainaimofthispaperisthroughtheapplicationofmicro-CT,scansformini-implants,3Dreconstructioninmini-pigsjawimplantandsur

2、roundingbonemineraldensitymeasurement,compareimmediateloadstainlesssteelmini-implantsandtitaniumalloymini-implantssuccessrateanditsimpactonthesurroundingtissue.Inordertotheclinicalapplicationofstainlesssteelmini-implantsexperimentalbasis.Methods:Twentyfourstainlesssteelmini-implantsandt

3、wentyfourtitaniumalloymini-implantswereplantedinthebuccalsidesofthejawofmini-pigsbyself-drilling.Twogroupsofmini-implantsleftandrightsidesissymmetricaldistribution,andthenumberofthefracturedmini-implantswasrecorded.Approximately200gconstantandcontinuousforcebystretchingclosednickel-tita

4、niumspringswereimmediateloadedforeverytwoadjoinedmini-implantsfortenweeks.Andnickeltitaniumtensionspringlengthmeasurement.Checkthestabilityofthemini-implants,anddentaltweezerstomeasuremini-implantsloosedegree.Aftertenweeks,themini-pigswerekilled,againtodetectmini-implantsloosedegree.The

5、numberofremainingmini-implantsinthetwogroupswasrecorded.ApplicationofSPSSsoftwareanalyzethesuccessrateofstainlesssteelandtitaniumalloymini-implants,withstatisticalsignificance(p<0.05).AccordingtoXrayfourstainlesssteelandfourtitaniumalloymini-implantsrespectivelywerechosentomakeMicro-CTs

6、canning.UsingiCAT3Dsoftwareforanalyzingthree-dimensionalimages,TC-Analyserdedicatedskeletalanalysissoftware,mini-implantsbonedensitymeasurementsaround,gettrabeculardifferentindicatorsdata,Comparewithimmediateloadingofstainlesssteelandtitaniumalloymini-implantssurroundingbonemineraldensi

7、ty.Results:①Stainlesssteelmini-implantsandtitaniumalloymini-implantshadgoodinitialstability;②Stainlesssteelmini-implantsbrokentwo,brokenratewas7.69%,titaniumalloymini-implantsbrokenfive,brokenratewas17.24%.Itcanbeseenthatthestainlesssteelmini-implantsbrokenratewaslowerthantheti