The effects of surface conditioning methods on the microtensile bond strength of Y-TZP ceramic were studied based on airborne particle abrasion and resin cements.Eight square-shaped（φ12 mm×5 mm high） Y-TZP cer...The effects of surface conditioning methods on the microtensile bond strength of Y-TZP ceramic were studied based on airborne particle abrasion and resin cements.Eight square-shaped（φ12 mm×5 mm high） Y-TZP ceramic were studied blocks（LAVATM,3M ESPE,USA） and flat occlusal dentin blocks were fabricated,pre-treated（airborne abrasion with 125μm Al2O3 particles,tribochemical silica coating with 110 μm Al2O3 particles modified by silica oxide）,and bonded to each other using resin cements（Panavia F 2.0,RelyX Unicem）.Thereafter the trilayer specimens were cut into microbar specimens with a bonding area of approximately 1.0±0.1 mm2 and then microtensile bond strength tests were performed.The Y-TZP ceramic following airborne particle abrasion with 125μm Al2O3 and silicoating,the surface roughness of Y-TZP and its surface silica content were confirmed to increase.Overall,the Y-TZP ceramic surface treatment with a tribochemical silica coating showed the highest microtensile bond strength of the phosphate monomer-based resin cement to Y-TZP ceramic（mean MPa=18.11±0.27（Panavia F 2.0）,17.45±0.39（Rely X Unicem）.In cases in which a silica coating was applied,there was no significant difference in the bonding strength depending on resin cements（P0.05）.展开更多
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
目的:探讨通用型粘结剂(Single Bond Universal,SBU)对牙本质的粘结强度。方法:选取A组(SBU)、B组(S3bond)和C组(hybrid coat,Hy C)三组不同类型处理剂,分别比较A组与B、C两组的牙本质微拉伸粘结强度。各组样本数量相同(n=30),结果通过...目的:探讨通用型粘结剂(Single Bond Universal,SBU)对牙本质的粘结强度。方法:选取A组(SBU)、B组(S3bond)和C组(hybrid coat,Hy C)三组不同类型处理剂,分别比较A组与B、C两组的牙本质微拉伸粘结强度。各组样本数量相同(n=30),结果通过两独立样本t检验进行统计学分析(α=0.05),通过扫描电镜观察断裂模式。结果:A组拉伸强度约23.371MP,与B组间无统计学差异,显示了与B组同等的粘结强度;与C组(17.314MP)比较,A组显示了较高的粘结强度,两组间有显著的统计学差异。断裂模式显示,三组断裂都主要以界面断裂为主,A、B两组样本断面可见牙本质小管结构,C组可见极少量牙本质小管结构。结论:通用型粘结剂Single Bond Universal具备与传统自酸一步法粘结剂同等的粘结强度,可以满足临床粘结要求;Single Bond Universal作为牙本质保护膜用于即刻牙本质封闭时,对牙本质小管有一定的封闭作用,并且可以获得较hybrid coat牙本质保护膜更高的粘结力,但其对牙本质小管的封闭效果还有待进一步实验研究。展开更多
Background The wet-bonding technique is recommended for the one-bottle dentin adhesive systems, but the moisture concept varies widely among the instructions of manufacturers as well as among investigators. The aim of...Background The wet-bonding technique is recommended for the one-bottle dentin adhesive systems, but the moisture concept varies widely among the instructions of manufacturers as well as among investigators. The aim of this study was to evaluate the effects of different dentin surface moisture on the microtensile bond strength （s） of an ethanol/water-based adhesive system and an acetone-based system to dentin. Methods Forty intact human premolars extracted for orthodontic reasons were used. Superficial occlusal flat dentin surfaces of these premolars were exposed, finished with wet 600-grit silicon carbide paper. Under four wet and dry conditions （overwet, blot dry, one-second dry and desiccated）, resin composite was bonded to dentin by using Single Bond （SB） or Prime ＆ Bond NT （PB） according to the manufacturers＇ instructions. The teeth were longitudinally sectioned in the “x” and “y” directions to obtain bonded beams with a cross-sectional area of 0. 81 mm^2 with a slow-speed diamond saw. The bonded specimens were tested in tension at a crosshead speed of 1 mm/min until failure of the bonds. Failure modes were observed with a scanning electron microscope. The mean bond strengths were analyzed by one-way ANOVA and Turkey＇s test. Results The bond strength of the overwet/SB, blot dry/SB, one-second dry/SB and desiccated/SB groups was 10.87 MPa, 22.47 MPa, 24.91 MPa and 12. 99 MPa, respectively. The bond strength of the overwet/PB, blot dry/PB, one-second dry/PB and desiccated/PB groups was 10.02 MPa, 20. 67 MPa, 21.82 MPa and 10. 09 MPa, respectively. For both SB and PB, the blot dry group and one-second dry group revealed significantly higher bond strengths than the overwet and desiccated groups （P 〈0.05）. Conclusions In order to achieve the highest bond strength to dentin, keeping appropriately moist condition is critical for the one-bottle dentin adhesive systems with solvent. the dentin surface in an ethanol/water or acetone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
文摘The effects of surface conditioning methods on the microtensile bond strength of Y-TZP ceramic were studied based on airborne particle abrasion and resin cements.Eight square-shaped（φ12 mm×5 mm high） Y-TZP ceramic were studied blocks（LAVATM,3M ESPE,USA） and flat occlusal dentin blocks were fabricated,pre-treated（airborne abrasion with 125μm Al2O3 particles,tribochemical silica coating with 110 μm Al2O3 particles modified by silica oxide）,and bonded to each other using resin cements（Panavia F 2.0,RelyX Unicem）.Thereafter the trilayer specimens were cut into microbar specimens with a bonding area of approximately 1.0±0.1 mm2 and then microtensile bond strength tests were performed.The Y-TZP ceramic following airborne particle abrasion with 125μm Al2O3 and silicoating,the surface roughness of Y-TZP and its surface silica content were confirmed to increase.Overall,the Y-TZP ceramic surface treatment with a tribochemical silica coating showed the highest microtensile bond strength of the phosphate monomer-based resin cement to Y-TZP ceramic（mean MPa=18.11±0.27（Panavia F 2.0）,17.45±0.39（Rely X Unicem）.In cases in which a silica coating was applied,there was no significant difference in the bonding strength depending on resin cements（P0.05）.
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.
文摘目的:探讨通用型粘结剂(Single Bond Universal,SBU)对牙本质的粘结强度。方法:选取A组(SBU)、B组(S3bond)和C组(hybrid coat,Hy C)三组不同类型处理剂,分别比较A组与B、C两组的牙本质微拉伸粘结强度。各组样本数量相同(n=30),结果通过两独立样本t检验进行统计学分析(α=0.05),通过扫描电镜观察断裂模式。结果:A组拉伸强度约23.371MP,与B组间无统计学差异,显示了与B组同等的粘结强度;与C组(17.314MP)比较,A组显示了较高的粘结强度,两组间有显著的统计学差异。断裂模式显示,三组断裂都主要以界面断裂为主,A、B两组样本断面可见牙本质小管结构,C组可见极少量牙本质小管结构。结论:通用型粘结剂Single Bond Universal具备与传统自酸一步法粘结剂同等的粘结强度,可以满足临床粘结要求;Single Bond Universal作为牙本质保护膜用于即刻牙本质封闭时,对牙本质小管有一定的封闭作用,并且可以获得较hybrid coat牙本质保护膜更高的粘结力,但其对牙本质小管的封闭效果还有待进一步实验研究。
文摘Background The wet-bonding technique is recommended for the one-bottle dentin adhesive systems, but the moisture concept varies widely among the instructions of manufacturers as well as among investigators. The aim of this study was to evaluate the effects of different dentin surface moisture on the microtensile bond strength （s） of an ethanol/water-based adhesive system and an acetone-based system to dentin. Methods Forty intact human premolars extracted for orthodontic reasons were used. Superficial occlusal flat dentin surfaces of these premolars were exposed, finished with wet 600-grit silicon carbide paper. Under four wet and dry conditions （overwet, blot dry, one-second dry and desiccated）, resin composite was bonded to dentin by using Single Bond （SB） or Prime ＆ Bond NT （PB） according to the manufacturers＇ instructions. The teeth were longitudinally sectioned in the “x” and “y” directions to obtain bonded beams with a cross-sectional area of 0. 81 mm^2 with a slow-speed diamond saw. The bonded specimens were tested in tension at a crosshead speed of 1 mm/min until failure of the bonds. Failure modes were observed with a scanning electron microscope. The mean bond strengths were analyzed by one-way ANOVA and Turkey＇s test. Results The bond strength of the overwet/SB, blot dry/SB, one-second dry/SB and desiccated/SB groups was 10.87 MPa, 22.47 MPa, 24.91 MPa and 12. 99 MPa, respectively. The bond strength of the overwet/PB, blot dry/PB, one-second dry/PB and desiccated/PB groups was 10.02 MPa, 20. 67 MPa, 21.82 MPa and 10. 09 MPa, respectively. For both SB and PB, the blot dry group and one-second dry group revealed significantly higher bond strengths than the overwet and desiccated groups （P 〈0.05）. Conclusions In order to achieve the highest bond strength to dentin, keeping appropriately moist condition is critical for the one-bottle dentin adhesive systems with solvent. the dentin surface in an ethanol/water or acetone
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。
