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1、上海交通大學碩士學位論文擴弓對犬牙槽突裂植骨區(qū)改建影響的CT研究姓名：姜寧申請學位級別：碩士專業(yè)：口腔臨床醫(yī)學指導教師：錢玉芬20080501上海交通大學碩士學位論文摘要第二部分擴弓對植骨區(qū)骨改建影響的CT研究目的：探索擴弓對牙槽突裂植骨區(qū)骨改建的影響。方法：選用24周齡Beagle犬4只，建立單側牙槽突裂植骨模型后隨機分為兩組，實驗組于植骨術后8周安裝擴弓器，擴弓4周、保持4周，對照組不做處理。所有動物于植骨術后8周、16周進行螺旋CT掃描，評價植入骨骨量的變化。結果：實驗組兩犬擴弓后骨量分別增加9.4
2、3%和7.29%，植骨區(qū)中段增加的量多于兩端；對照組骨量分別減少0.88%和4.30%。結論：擴弓有利于減少牙槽突裂植骨區(qū)的吸收。關鍵詞：牙槽突裂，植骨，擴弓，CTII上海交通大學碩士學位論文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上海交通大學碩士學位論文ABSTRACTPARTTWOACOMPUTEDTOMOGRAPHI
7、CEVALUATIONONTHEAUTOGRAFTEDALVEOLUSINDOGSAFTERMAXILLARYEXPANSIONObjectives:Toinvestigateboneremodelingoftheautograftedalveolusaftermaxillaryexpansion.Methods:4Beagledogs(24weeksold)weresurgicallycreatedanunilateralalveolardefectwithautografttakenimmediate
8、lyandthenwererandomlydividedintotwogroups.Theexpansiongroupconsistofactive(4weeks)，retention(4weeks)phases.Thecontrolgroupreceivednoexpansion.SpriralCTexaminationwasconductedat8，16weeksafterautografttoevaluatethevol
