摘要
目的用体外研究的方法探索激光龋齿检测仪评价乳牙去腐净的可行性。方法选取患邻面中龋的乳磨牙8颗为研究对象,测量去腐前后激光龋齿检测仪读数,利用龋蚀检测液、硬组织硬度仪和偏光显微镜对腐质是否去净进行评判,分析激光龋齿检测仪读数与其相关性,探索激光龋齿检测仪在评价去腐洁净度中的应用。结果去腐后色素沉着处牙本质硬度为(46.99±12.44)HV;健康位点备洞后洞缘的牙本质硬度为(67.39±16.59)HV,二者间差异有统计学意义(P<0.05)。去腐前DIAGNOdent读数与去腐后色素沉着处DIAGNOdent读数差异无统计学意义(P>0.05);而与去腐后无色素沉着处DIAGNOdent读数差异有统计学意义(P<0.05)。偏光显微镜观察可见:去腐后无论是色素沉着处还是无色素沉着处,均未见细菌侵入。结论激光龋齿检测仪不能区分脱矿染色的牙本质与细菌侵入的牙本质,不适用于评价腐质去除程度。
Objective To explore the feasibility of using laser fluorescence device for assessing caries removal in primary teeth in vitro.Methods 8 primary molars with approximal caries were collected,and caries were removed in vitro.The laser fluorescence readings of dentin before and after caries removal were recorded.To judge the degree of caries removal by caries detector,polarizing microscope and dental microhardness tester.The correlation of DIAGNO-dent reading with Viker＇s Hardness was analyzed.The feasibility of using laser fluorescence for assessing caries remo-val was explored.Results The average Viker＇s Hardness of dentin after caries removal with staining was（46.99± 12.44） HV,and the average Viker＇s Hardness of normal control was（67.39±16.59） HV.There was significant difference between the two groups（P0.05）.There was no significant difference between laser fluorescence readings before and after caries removal with staining（P0.05）.And there was significant difference between the laser fluorescence readings before and after the caries removal without staining（P0.05）.It was observed by polarizing microscope that there was no caries residue in sample,no matter stain or not.Conclusion The laser fluorescence could not distinguish stained dentin from caries,and is not suitable for assessing caries removal.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2011年第5期457-460,共4页
West China Journal of Stomatology
关键词
激光龋齿检测仪
韦氏硬度
偏光显微镜
laser fluorescence device
Viker＇s Hardness
polarizing microscope
