The purpose of this study was to evaluate the influence of acid etching on the bond strength of a universal adhesive system (Single Bond Universal, 3M) to caries-affected dentin. Forty permanent third molars were sele...The purpose of this study was to evaluate the influence of acid etching on the bond strength of a universal adhesive system (Single Bond Universal, 3M) to caries-affected dentin. Forty permanent third molars were selected and carious lesions were induced by the microbiological method with?S. mutans?ATCC25175. Teeth were allocated randomly across four experimental designs (n?=?10): PA-I: phosphoric acid etching and application of the adhesive system, followed by immediate microtensile bond strength testing;PA-CC: phosphoric acid etching and application of the adhesive system, followed by microtensile bond strength testing after a 14-day cariogenic challenge;NPA-I: application of the adhesive system without acid etching, followed by immediate bond strength testing and NPA-CC: application of the adhesive system without acid etching followed by bond strength testing after 14-day cariogenic challenge. For microtensile bond strength testing,?a restoration with Charisma composite resin was made and each specimen was sectioned with a cross-sectional area of 1 mm2. Only adhesive and mixed fractures were considered for bond strength calculation. Results were evaluated by the Kruskal-Wallis and Friedman tests. The highest bond strengths were observed in the phosphoric acid etching groups (p??0.05). Cariogenic challenge did not affect bond strength (p?>?0.05). The predominant fracture type was adhesive. We conclude that phosphoric acid increased the bond strength of the Single Bond Universal system to caries-affected dentin, and that cariogenic challenge did not interfere with this bond strength.展开更多
Objective To investigate whether multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin. Methods Twelve caries-free human primary molars were randomly divided into 2 gro...Objective To investigate whether multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin. Methods Twelve caries-free human primary molars were randomly divided into 2 groups. In group 1, each tooth was hemisected into 2 halves. One half was assigned to the control subgroup 1, which was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instruc- tions; the other half was assigned to experimental subgroup 1, in which the adhesive was applied three times before light curing. In group 2, one split half tooth was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instructions; for the other half, three layers of adhesive were applied with each successive layer of light curing. Specimens were stored in 0.9% NaC1 containing 0.02% sodium azide at 37℃ for 18 months and then were subjected to microtensile bond strength test and the fracture mode analysis. Results When the adhesive was applied three times before light curing, the bond strength of the ex- perimental subgroup 1 was significantly higher than that of the control subgroup 1 （47.46__＋13.91 vs. 38.12＋11.21 MPa, P〈O.05）. When using the technique of applying multiple layers of adhesive with each successive layer of light curing, no difference was observed in bond strength between the control subgroup and the experimental subgroup （39.40＋8.87 vs. 40.87-＋9.33 MPa, P〉O.05）. Conclusion Multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin when using the technique of light-curing after applying 3 layers of adhesive.展开更多
目的:评价一种新型通用型牙本质粘结剂(All Bond Universal,ABU)对牙本质的粘结强度,为临床选择合适的粘结剂提供参考依据。方法:选取人体12颗无龋坏磨牙,磨除牙釉质暴露牙本质面,分别用酸蚀-冲洗法和一步自酸蚀法使用All Bond Universa...目的:评价一种新型通用型牙本质粘结剂(All Bond Universal,ABU)对牙本质的粘结强度,为临床选择合适的粘结剂提供参考依据。方法:选取人体12颗无龋坏磨牙,磨除牙釉质暴露牙本质面,分别用酸蚀-冲洗法和一步自酸蚀法使用All Bond Universal粘结剂,在其上堆砌树脂,并与酸蚀-冲洗粘结剂Prime&Bond NT(PBN)和一步法自酸蚀粘结剂G Bond(GB)进行对照。试样于37℃去离子水储存24 h后,每颗牙齿垂直于粘结面制备出0.81 mm2的树脂/牙本质试件,进行牙本质粘结微拉伸强度(μTBS)测试。结果:通用型牙本质粘结剂All Bond Universal在两种粘结方法下,其粘结力均高于对照组;就All Bond Universal本身而言,酸蚀-冲洗技术可以提高其粘结强度。结论:这种新型牙本质粘结剂具有较高的粘结强度,并且酸蚀-冲洗技术能提高其粘结力。展开更多
目的:比较4种不同的粘接系统对正常牙本质和龋损影响牙本质的粘接强度。方法:24颗近中面中龋的人离体磨牙,在龋损检知液监控下用慢速球钻去龋,在远中面健康牙本质上制备相同深度的窝洞。随机分为4组,分别用4种粘接系统(Prime&Bo...目的:比较4种不同的粘接系统对正常牙本质和龋损影响牙本质的粘接强度。方法:24颗近中面中龋的人离体磨牙,在龋损检知液监控下用慢速球钻去龋,在远中面健康牙本质上制备相同深度的窝洞。随机分为4组,分别用4种粘接系统(Prime&Bond NT,Adper Single Bond 2,Adper Prompt和XenoⅢ)按照使用说明进行粘接,用树脂(FiltekP60)修复后保存于37℃的水中。沿牙长轴方向将树脂和牙齿从颊舌方向片切,厚度约为1.0mm,并修整成粘接面(正常牙本质或龋损影响牙本质)面积约1mm2的试件,进行微拉伸实验,并用扫描电镜观察粘接面形态。结果:4种粘接系统在正常牙本质上获得的粘接强度均强于在龋损影响牙本质上获得的强度(P<0.05);2种全酸蚀粘接系统在2种牙本质上获得的粘接强度均强于2种自酸蚀粘接系统获得的强度(P<0.05)。扫描电镜观察,混合层在龋损影响牙本质上表现得厚但更疏松;与正常牙本质相比,龋损影响牙本质上形成的树脂突少。结论:2种全酸蚀粘接系统无论在正常牙本质还是龋损影响牙本质上均能获得比2种自酸蚀粘接系统更强的粘接力。展开更多
目的:比较金刚砂车针和600目砂纸产生的牙本质玷污层对两步法自酸蚀牙本质粘接系统微拉伸粘接强度的影响。方法:暴露28颗前磨牙的咬合面的牙本质,随机分为2组,分别用高速金刚砂车针(车针组)和600目砂纸(砂纸组)打磨牙本质表面。每组选择...目的:比较金刚砂车针和600目砂纸产生的牙本质玷污层对两步法自酸蚀牙本质粘接系统微拉伸粘接强度的影响。方法:暴露28颗前磨牙的咬合面的牙本质,随机分为2组,分别用高速金刚砂车针(车针组)和600目砂纸(砂纸组)打磨牙本质表面。每组选择2颗牙齿直接用扫描电镜观察牙本质玷污层,剩余的12颗牙齿的打磨面用两步法自酸蚀牙本质粘接系统Opti Bond XTR粘接复合树脂。垂直于粘接面将粘接好的样本切成1 mm厚的薄片,每组随机选取6片在扫描电镜下观察粘接界面的形态;剩余薄片被切割成横截面积为1.0 mm^2的样本,每组随机选择15个样本进行微拉伸力的检测。结果:砂纸组的玷污层薄而均匀;车针组的玷污层较厚,且在牙本质小管内形成管塞。砂纸组和车针组的微拉伸粘接强度分别为(38.77±4.54)MPa 和(38.30±5.11)MPa,2组间差异无统计学意义(P>0.05)。两步法自酸蚀牙本质粘接系统Opti Bond XTR对2种打磨方法产生的粘接面均有良好的渗透,产生的树脂突与底部连接紧密,根部有明显楔状袖口样(funnel-shapped)结构。结论:车针和砂纸打磨形成不同的玷污层,但对两步法自酸蚀牙本质粘接系统Opti Bond XTR的微拉伸粘接强度无明显影响。展开更多
目的评价硅氧烷基树脂Filtek P90配套粘接剂silorane system adhesive(SA)的牙本质粘接强度及耐久性,以期为临床应用提供参考。方法选择24颗人离体磨牙,随机分为三组:SE组:两步法自酸蚀粘接剂Clearfil SE Bond(SE)+P60树脂;EO组:一步法...目的评价硅氧烷基树脂Filtek P90配套粘接剂silorane system adhesive(SA)的牙本质粘接强度及耐久性,以期为临床应用提供参考。方法选择24颗人离体磨牙,随机分为三组:SE组:两步法自酸蚀粘接剂Clearfil SE Bond(SE)+P60树脂;EO组:一步法自酸蚀粘接剂Adper Easy One(EO)+P60树脂;SA组:SA+硅氧烷基P90树脂。每组8颗牙齿,按照相应的使用说明在制备的牙本质平面上粘接树脂块,用硬组织切片机制备截面积约为1mm^2的条状试样,切割得到的试样一半在即刻测试微拉伸粘接强度,另一半蒸馏水浸泡6个月后测试微拉伸粘接强度。结果粘接后24h切割得到的试样进行即刻微拉伸强度测试,SA组SA的粘接强度为[(24.96±2.29)MPa]与SE组粘接剂SE的粘接强度[(35.90±3.68)MPa]差异有统计学意义(P<0.05),而与EO组粘接剂EO[(24.23±2.89)MPa]差异无统计学意义(P>0.05)。蒸馏水保存6个月后,SA的微拉伸粘接强度与即刻相比差异没有统计学意义(P>0.05)。SE、EO的微拉伸粘接强度均低于切割后即刻,差异有统计学意义(P<0.05)。蒸馏水浸泡6个月后,SA的粘接强度[(23.23±2.38)MPa]仍与SE组的粘接强度[(32.21±2.85)MPa]差异有统计学意义(P<0.05),但高于EO组EO的粘接强度[(20.52±3.40)MPa](P<0.05)。结论 SA的粘接界面拥有良好的耐久性。蒸馏水保存6个月后SA的粘接强度较EO一步法自酸蚀粘接剂粘接强度高,但仍低于两步法自酸蚀粘接剂SE的粘接强度。展开更多
文摘The purpose of this study was to evaluate the influence of acid etching on the bond strength of a universal adhesive system (Single Bond Universal, 3M) to caries-affected dentin. Forty permanent third molars were selected and carious lesions were induced by the microbiological method with?S. mutans?ATCC25175. Teeth were allocated randomly across four experimental designs (n?=?10): PA-I: phosphoric acid etching and application of the adhesive system, followed by immediate microtensile bond strength testing;PA-CC: phosphoric acid etching and application of the adhesive system, followed by microtensile bond strength testing after a 14-day cariogenic challenge;NPA-I: application of the adhesive system without acid etching, followed by immediate bond strength testing and NPA-CC: application of the adhesive system without acid etching followed by bond strength testing after 14-day cariogenic challenge. For microtensile bond strength testing,?a restoration with Charisma composite resin was made and each specimen was sectioned with a cross-sectional area of 1 mm2. Only adhesive and mixed fractures were considered for bond strength calculation. Results were evaluated by the Kruskal-Wallis and Friedman tests. The highest bond strengths were observed in the phosphoric acid etching groups (p??0.05). Cariogenic challenge did not affect bond strength (p?>?0.05). The predominant fracture type was adhesive. We conclude that phosphoric acid increased the bond strength of the Single Bond Universal system to caries-affected dentin, and that cariogenic challenge did not interfere with this bond strength.
文摘Objective To investigate whether multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin. Methods Twelve caries-free human primary molars were randomly divided into 2 groups. In group 1, each tooth was hemisected into 2 halves. One half was assigned to the control subgroup 1, which was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instruc- tions; the other half was assigned to experimental subgroup 1, in which the adhesive was applied three times before light curing. In group 2, one split half tooth was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instructions; for the other half, three layers of adhesive were applied with each successive layer of light curing. Specimens were stored in 0.9% NaC1 containing 0.02% sodium azide at 37℃ for 18 months and then were subjected to microtensile bond strength test and the fracture mode analysis. Results When the adhesive was applied three times before light curing, the bond strength of the ex- perimental subgroup 1 was significantly higher than that of the control subgroup 1 （47.46__＋13.91 vs. 38.12＋11.21 MPa, P〈O.05）. When using the technique of applying multiple layers of adhesive with each successive layer of light curing, no difference was observed in bond strength between the control subgroup and the experimental subgroup （39.40＋8.87 vs. 40.87-＋9.33 MPa, P〉O.05）. Conclusion Multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin when using the technique of light-curing after applying 3 layers of adhesive.
文摘目的:评价一种新型通用型牙本质粘结剂(All Bond Universal,ABU)对牙本质的粘结强度,为临床选择合适的粘结剂提供参考依据。方法:选取人体12颗无龋坏磨牙,磨除牙釉质暴露牙本质面,分别用酸蚀-冲洗法和一步自酸蚀法使用All Bond Universal粘结剂,在其上堆砌树脂,并与酸蚀-冲洗粘结剂Prime&Bond NT(PBN)和一步法自酸蚀粘结剂G Bond(GB)进行对照。试样于37℃去离子水储存24 h后,每颗牙齿垂直于粘结面制备出0.81 mm2的树脂/牙本质试件,进行牙本质粘结微拉伸强度(μTBS)测试。结果:通用型牙本质粘结剂All Bond Universal在两种粘结方法下,其粘结力均高于对照组;就All Bond Universal本身而言,酸蚀-冲洗技术可以提高其粘结强度。结论:这种新型牙本质粘结剂具有较高的粘结强度,并且酸蚀-冲洗技术能提高其粘结力。
文摘目的:比较4种不同的粘接系统对正常牙本质和龋损影响牙本质的粘接强度。方法:24颗近中面中龋的人离体磨牙,在龋损检知液监控下用慢速球钻去龋,在远中面健康牙本质上制备相同深度的窝洞。随机分为4组,分别用4种粘接系统(Prime&Bond NT,Adper Single Bond 2,Adper Prompt和XenoⅢ)按照使用说明进行粘接,用树脂(FiltekP60)修复后保存于37℃的水中。沿牙长轴方向将树脂和牙齿从颊舌方向片切,厚度约为1.0mm,并修整成粘接面(正常牙本质或龋损影响牙本质)面积约1mm2的试件,进行微拉伸实验,并用扫描电镜观察粘接面形态。结果:4种粘接系统在正常牙本质上获得的粘接强度均强于在龋损影响牙本质上获得的强度(P<0.05);2种全酸蚀粘接系统在2种牙本质上获得的粘接强度均强于2种自酸蚀粘接系统获得的强度(P<0.05)。扫描电镜观察,混合层在龋损影响牙本质上表现得厚但更疏松;与正常牙本质相比,龋损影响牙本质上形成的树脂突少。结论:2种全酸蚀粘接系统无论在正常牙本质还是龋损影响牙本质上均能获得比2种自酸蚀粘接系统更强的粘接力。
文摘目的:比较金刚砂车针和600目砂纸产生的牙本质玷污层对两步法自酸蚀牙本质粘接系统微拉伸粘接强度的影响。方法:暴露28颗前磨牙的咬合面的牙本质,随机分为2组,分别用高速金刚砂车针(车针组)和600目砂纸(砂纸组)打磨牙本质表面。每组选择2颗牙齿直接用扫描电镜观察牙本质玷污层,剩余的12颗牙齿的打磨面用两步法自酸蚀牙本质粘接系统Opti Bond XTR粘接复合树脂。垂直于粘接面将粘接好的样本切成1 mm厚的薄片,每组随机选取6片在扫描电镜下观察粘接界面的形态;剩余薄片被切割成横截面积为1.0 mm^2的样本,每组随机选择15个样本进行微拉伸力的检测。结果:砂纸组的玷污层薄而均匀;车针组的玷污层较厚,且在牙本质小管内形成管塞。砂纸组和车针组的微拉伸粘接强度分别为(38.77±4.54)MPa 和(38.30±5.11)MPa,2组间差异无统计学意义(P>0.05)。两步法自酸蚀牙本质粘接系统Opti Bond XTR对2种打磨方法产生的粘接面均有良好的渗透,产生的树脂突与底部连接紧密,根部有明显楔状袖口样(funnel-shapped)结构。结论:车针和砂纸打磨形成不同的玷污层,但对两步法自酸蚀牙本质粘接系统Opti Bond XTR的微拉伸粘接强度无明显影响。
文摘目的评价硅氧烷基树脂Filtek P90配套粘接剂silorane system adhesive(SA)的牙本质粘接强度及耐久性,以期为临床应用提供参考。方法选择24颗人离体磨牙,随机分为三组:SE组:两步法自酸蚀粘接剂Clearfil SE Bond(SE)+P60树脂;EO组:一步法自酸蚀粘接剂Adper Easy One(EO)+P60树脂;SA组:SA+硅氧烷基P90树脂。每组8颗牙齿,按照相应的使用说明在制备的牙本质平面上粘接树脂块,用硬组织切片机制备截面积约为1mm^2的条状试样,切割得到的试样一半在即刻测试微拉伸粘接强度,另一半蒸馏水浸泡6个月后测试微拉伸粘接强度。结果粘接后24h切割得到的试样进行即刻微拉伸强度测试,SA组SA的粘接强度为[(24.96±2.29)MPa]与SE组粘接剂SE的粘接强度[(35.90±3.68)MPa]差异有统计学意义(P<0.05),而与EO组粘接剂EO[(24.23±2.89)MPa]差异无统计学意义(P>0.05)。蒸馏水保存6个月后,SA的微拉伸粘接强度与即刻相比差异没有统计学意义(P>0.05)。SE、EO的微拉伸粘接强度均低于切割后即刻,差异有统计学意义(P<0.05)。蒸馏水浸泡6个月后,SA的粘接强度[(23.23±2.38)MPa]仍与SE组的粘接强度[(32.21±2.85)MPa]差异有统计学意义(P<0.05),但高于EO组EO的粘接强度[(20.52±3.40)MPa](P<0.05)。结论 SA的粘接界面拥有良好的耐久性。蒸馏水保存6个月后SA的粘接强度较EO一步法自酸蚀粘接剂粘接强度高,但仍低于两步法自酸蚀粘接剂SE的粘接强度。
