【作者】 王晓燕； 刘颖熠； 田福聪； 王春莲；

【Author】 WANG Xiao-yan,LIU Ying-yi,TIAN Fu-cong,WANG Chun-lian(Department of Cariology and Endodontology,Peking University School and Hospital of Stomatology

【机构】 北京大学口腔医学院牙体牙髓科；

【摘要】 目的:通过观察直接粘接修复体边缘适应性及边缘着色,评价牙科放大镜在直接粘接修复体修形抛光中的作用。方法:选择20颗完整前磨牙,在颊/舌面制备Ⅴ类洞,使用粘接剂Adper Prompt和树脂Tetric N Ceram进行直接粘接修复。将牙齿随机分为两组。A组:颊侧修复体进行传统修形抛光(C抛光),依次使用F104R,SF104R,OneGloss和CompoMaster。舌侧修复体采用牙科放大镜辅助修形抛光(L抛光),即在C抛光技术基础上使用头戴式放大镜(2.5倍)。B组:颊侧和舌侧修复体分别采用L抛光和C抛光技术。一周后由两位医师在有放大系统(W评价)或无放大系统(W/O评价)辅助下对修复体边缘进行分区评价,探及边缘记1分。将牙齿进行染色后,记录修复体边缘着色。结果:使用C抛光技术的修复体边缘分值(3.8±1.8[W/O评价]和3.6±1.7[W评价])显著高于使用L抛光技术的修复体(2.7±1.6[W/O评价]和2.5±1.4[W评价])(P<0.05)。两种评价方法之间无统计学差异(P>0.05)。修复体边缘着色分别为4.6±1.7[C抛光]和3.4±2.0[L抛光],差异具有统计学意义(P<0.05)。修复体边缘适应性与边缘着色显著相关(Pearson相关系数为0.64[WO评价]和0.75[W评价])。结论:在直接粘接修复体修形抛光过程中使用牙科放大镜能够有效提高修复体边缘质量,减少边缘着色。更多还原

【Abstract】 Objective:This study was to evaluate effects of magnifying loupes on finishing & polishing of direct adhesive restoratives through analysis of marginal adaptation and marginal stain.Methodology:Class V cavities were prepared on buccal and lingual surfaces of twenty sound premolars.All cavities were restored with adhesive Adper Prompt and composite resin Tetric N Ceram.After placement of the restorations,they were finished/polished with one of the following two methods:C technique, restorations were finished/polished in a sequence of F104R,SF104R,OneGloss and CompoMaster;L technique,with the aid of magnifying loupes(magnification×2.5),restorations were finished/polished in the same sequence as C technique.All teeth were randomly divided into two groups:Group A,restorations on buccal and palatal/lingual surfaces were finished using C technique and L technique respectively;Group B,restorations on buccal and palatal/lingual surfaces were finished using L technique and C technique respectively.After 1 week of water storage,the marginal adaptation of restoratives was measured by two evaluators with (W evaluation) or without(W/O evaluation) the aid of loupes.The margin of restorations was divided into 8 zones and each zone was indicated as score 1 when it was detectable.The restored teeth were then subjected into black tea for 3 days and marginal stain was recorded.Results:The marginal adaptation scores of restorations finished/polished with C technique(3.8±1.8 and 3.6±1.7 for W/O and W evaluation respectively) were higher than those finished/polished with L technique(2.7±1.6 and 2.5±1.4 for W/O and W evaluation respectively)(P<0.05).There is no significant difference in marginal adaptation between restorations evaluated using W and W/O methods(P>0.05).The marginal stains of restorations finished/polished with C technique were 4.6±1.7 which was higher than those finished/polished with L technique(3.4±2.0)(P<0.05)。The marginal stain was correlated well with marginal adaptation and Pearson coefficients were 0.64 and 0.75 for WO and W evaluation respectively.Conclusion:Loupe-aided finishing and polishing technique leads to higher marginal quality and less marginal stain of direct adhesive restorations.更多还原