micro-ct评价即刻负载对ss与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-pigsjawimplant

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

3、implantsandtwentyfourtitaniumalloymini-implantswereplantedinthebuccalsidesofthejawofmini-pigsbyself-drilling.Twogroupsofmini-implantsleftandrightsidesissymmetricaldistribution,andthenumberofthefracturedmini-implantswasrecorded.Approximately200gconstantandcontinuousforcebystretchin

4、gclosednickel-titaniumspringswereimmediateloadedforeverytwoadjoinedmini-implantsfortenweeks.Andnickeltitaniumtensionspringlengthmeasurement.Checkthestabilityofthemini-implants,anddentaltweezerstomeasuremini-implantsloosedegree.Aftertenweeks,themini-pigswerekilled,againtodetectmini

5、-implantsloosedegree.Thenumberofremainingmini-implantsinthetwogroupswasrecorded.ApplicationofSPSSsoftwareanalyzethesuccessrateofstainlesssteelandtitaniumalloymini-implants,withstatisticalsignificance(p<0.05).AccordingtoXrayfourstainlesssteelandfourtitaniumalloymini-implantsrespect

6、ivelywerechosentomakeMicro-CTscanning.UsingiCAT3Dsoftwareforanalyzingthree-dimensionalimages,TC-Analyserdedicatedskeletalanalysissoftware,mini-implantsbonedensitymeasurementsaround,gettrabeculardifferentindicatorsdata,Comparewithimmediateloadingofstainlesssteelandtitaniumalloymini

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

8、plantsbrokenratewaslowerthantheti