摘要
为了解牙颈部缺损的组织变化,进而探讨其发病机理,作者采用扫描电镜观察12对双尖牙在模拟横刷牙、酸蚀和力分别或联合作用后,颈部形成的缺损表面结构和剖面硬组织的改变。缺损表面的改变反映了三种因素协同致损的结果;缺损剖面观察到牙釉质和牙本质的微裂和损伤,说明模拟力在实验过程中,使牙颈部硬组织发生了应力疲劳裂纹和损伤,提示了力在楔状缺损形成中的重要作用,并为解释临床牙齿咬合病的发生提供了实验依据。
Experimentalcervicaldefectson12pairsofpremolarcausedbycros-brushing,ero-sionandocclusalforceseparatelyortogetherwereobservedunderSEMChangesonthesurfaceofcervicaldefectssuggestedthatthedefectswereinducedbytheabovethrefactorscombined.Itwasinterestingthatvariouskindsofmicrocrackswerenoticedonsectionsofenamelanddentinatthecer-vicaldefectareasmadebymimickingocclusalforcecombinedwithotherfactors.Theresultsseemedtoindicatethattheocclusalforcewouldplayanimportantroleonformationofthecervicalwedge-shapeddefectandthatacumulationofthestresscausedthehardtissueinjuredandmicrocracked.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
1996年第1期31-33,共3页
Chinese Journal of Stomatology
关键词
楔状缺损
扫描电镜
牙颈部缺损
Teeth,cervicalwedge-shapeddefectsofSEMStressfatigue