下颌颏孔前区骨内解剖结构在椎束ct的表现

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1、CharacteristicsofBonyCanalsandforamensinMandibularInterforaminalRegionObservedonConeBeamComputedTomographyImagesStomatologydepartment，MedicalcollegeofZhejiangUniversityPostgraduate：MisiSiSupervisor：ZhiyuanGuAbstractObjectiveMandibularinterforaminalregionwasnolongersafefordentalimplantandassociat

2、edsurgerybecauseofthefrequentreportsonunexpectedseverebloodingandpainduringandafterthesurgery．ThesecomplicationsWasdescribedasapossibleresultsofbonycanalandforameninjuD，inthisregion．ThepurposeofthisstudyWastOsizeandlocatethemandibularincisivecanal，mentalforamenandanteriorlooponconebeamcomputedto

3、mography(CBCT)images，andalsocomparetheseimageswithanotherusualmethod--panoramicradiograph(OPG)．Accordingtothestatisticdataandimagedescription,thepresentstudywouldalsorecommandanewsafetymarginformandibularinterforaminalsurgery．MateriaIsandMethodsThecharacteristicsoftheanatomicallandmarksinthemand

4、ibularanteriorregionwereinvestigatedusingCBCTandOPGimagesobtainedfrom30dentulouspatients(malel3，femalel7；averageage31．3，agefroml2to68)and3edentulous．Allpatients’imageswereobtainedfromStomatologyHospitalaffiliatedtoZhejiangUniversity(Hangzahou．，Zhejiang，China)，fromNovember,2009toJanuary,2010．Afte

5、rimageprocessingandreconstruction，tWOprofessionaldentistsconductedV浙江大学硕士学位论文英文摘要themeasurementandobservationasfollows：①Evaluatetheimageclarityofincisivecanal，mentalforamenandanteriorloopinmandibularinterforaminalregionOnCBCTandOPGimages，byratingthemtothreegrades⋯invisible(0points)，visiblebutnot

6、clear(1point)，clear(2points)．Andthencomparedtheidentificationandresolutionbetweenbothoralradiographies．②Measurethemandibularincisivecanal，mentalforamenandanteriorloopbydiametersofthreedimensions，distancefromupper／lower／lingual／labialmandibularcortex，canallengthandotherparameterstOdescribethesize

7、，shape，locationanddirectionsoftheseimportantanatomies．AlldataWasanalyzedbystatisticalpackageofSPSS16．0software．Results①TheidentificationofincisivecanalandanteriorloopbyCBCTwasobviouslyhigherthanOPG,aswellastheimageresolution