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1、安徽醫(yī)科人學(xué)碩Ij學(xué)位論文Applicationofdifferentdistractionosteogenesisinobjective：mandibuladefectrestorationAbstractOralandMaxillofacialsurgicaldistractionosteogenesis(DO)isnowmainlyapplyinginmicro-mandibulaabnormalitycausedbycongenitalgrowthofmandibula，andthedistractionosteogenesisincludesmonofocaldistractio
2、nbifocaldistraction，trifocaldistraction．Ithasonlyalittleexperimentalresearchandclinicalapplicationintherestitutionofasegmentaldefectofmandibula．Almostofthetoolsfordistractionosteogenesisbelongtoouter-mouthstyleones，whichhavefairlylargedifferenceontheaspectsofthequality，designstructure，andmodeoffix
3、ingofthetoolsfordistractionosteogenesisrequiredbymandibuladefectorthodontics．Thistest，accordingtointernationalstandard，designsoutbuilt-inbifocaldistractionandtrifocaldistraction．Throughestablishingdifferentbifocaldistractionandtrifocaldistractiontoconductstretchingtothegoatmandibuladefect，andobser
4、vesandresearchestheosteogeneticprocesstocomparewiththenewboneformationthroughtwodifferentmethods．Methods：8adultgoatsof10-12monthsoldwererandomlydividedintobifocalDistractiongroup(n=4)andtrifocaldistractiongroup(n=4)whichwasself-designedaccordingtoInternationalDistractionGroupstandard．Killthetwogro
5、upgoats8weeksaftercompletionofdistraction．NewlygrownbonetissuesampleatjawdistractionareahasbeenanalyzedbyX—Rayandbonedensitometry，andpartofwhichwasmadeintodelimingparaffinsectionandHEcolorations．Stifftissuemicrosectionscanning5=fc=徽醫(yī)科人學(xué)碩．1j學(xué)位論義electronmicroscopyandStifftissuemicrosectiontetracycli
6、nefluorescencepairedlabeledtechniqueanalysisisaswelldonetothesample．BonedensitometryanalysisdataiscalculatedbystatisticalsoftwareSPSS11．0．a(chǎn)ndwhenP<0．05thediscrepancyisofsignificancemeaning．Resuits：Allthe8testgoatscanalivetotheplannedtimewithoutinfectioninthewoundofthestretchingarea．Allofwhichcanta
7、kefoodinagoodmannerafteroperation，andtheirwoundscouldhealinStageIandstitchescouldbetakenoutin7days．Afterexecution，itcanbeobservedthatallthestretchingtoolsarewellfixedwithoutanylooseness；newboneisformedinthestretc
