扩弓对犬牙槽突裂植骨区改建影响的CT研究

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1、上海交通大学硕士学位论文扩弓对犬牙槽突裂植骨区改建影响的CT研究姓名：姜宁申请学位级别：硕士专业：口腔临床医学指导教师：钱玉芬20080501上海交通大学硕士学位论文摘要第二部分扩弓对植骨区骨改建影响的CT研究目的：探索扩弓对牙槽突裂植骨区骨改建的影响。方法：选用24周龄Beagle犬4只，建立单侧牙槽突裂植骨模型后随机分为两组，实验组于植骨术后8周安装扩弓器，扩弓4周、保持4周，对照组不做处理。所有动物于植骨术后8周、16周进行螺旋CT扫描，评价植入骨骨量的变化。结果：实验组两犬扩弓后骨量分别增加9.4

2、3%和7.29%，植骨区中段增加的量多于两端；对照组骨量分别减少0.88%和4.30%。结论：扩弓有利于减少牙槽突裂植骨区的吸收。关键词：牙槽突裂，植骨，扩弓，CTII上海交通大学硕士学位论文ABSTRACTTHEEFFECTOFMAXILLARYEXPANSIONONTHEAUTOGRAFTEDALVEOLUSINDOGS——ACOMPUTEDTOMOGRAPHICSTUDYABSTRACTAutograftisgenerallyacceptedtoreconstructalveolarbonedefe

3、ct.However，thetreatmentresultwasnotstableduetoresorptionofgraftedbonelackoffunctionalstimulationssuchasexpansionaftergraftingsurgery.Basedofthis，itisneededtofindoutthecharacteristicsofboneremodelingundermechanicalloadingforce.PARTONEANINVESTIGATIONOFDOGSA

4、FTERALVEOLARBONEGRAFTINGObjectives：Toinvestigateremodelingregulationsandresorptionfeaturesofautograftedalveolus.Methods：Afterextractionofthemaxillarysecondandthirdincisors，unilateralalveolarbonedefectsweresurgicallycreatedin2Beagledogs(24weeksold)within10

5、mminwidth，andautograftwastakenimmediatelyafterthedefectcreation.SpriralCTexaminationwasconductedat4，8，16weeksafterautografttoobservetheprogressoftheboneremodelingandevaluatethepositionofthebonybridgeandthevolumechangesofthebone.Results：Bonybridgewasmainly

6、locatedinthemiddlepartialtotheposteriorandsuperioroftheautograftarea，nearthebaseofnasalcavity.Conclutions：Theautograftedalveolusresorptedobviouslyintheearlytime,withtimegoingtheresorptionofbonetendedstable.III上海交通大学硕士学位论文ABSTRACTPARTTWOACOMPUTEDTOMOGRAPHI

7、CEVALUATIONONTHEAUTOGRAFTEDALVEOLUSINDOGSAFTERMAXILLARYEXPANSIONObjectives:Toinvestigateboneremodelingoftheautograftedalveolusaftermaxillaryexpansion.Methods:4Beagledogs(24weeksold)weresurgicallycreatedanunilateralalveolardefectwithautografttakenimmediate

8、lyandthenwererandomlydividedintotwogroups.Theexpansiongroupconsistofactive(4weeks)，retention(4weeks)phases.Thecontrolgroupreceivednoexpansion.SpriralCTexaminationwasconductedat8，16weeksafterautografttoevaluatethevol