We sought to evaluate immediate and delayed micro-tensile bond strength of Panavia F2.0 and Multilink Sprint resin cement to superficial, deep and cervical dentin. Thirty-six freshly extracted non-carious human molars...We sought to evaluate immediate and delayed micro-tensile bond strength of Panavia F2.0 and Multilink Sprint resin cement to superficial, deep and cervical dentin. Thirty-six freshly extracted non-carious human molars were sectioned in the mesiodistal direction to expose three different dentin regions including superficial dentin （1 mm below the dentine-enamel junction）, deep dentin （1 mm above the highest pulp horn） and cervical dentin （0.5 mm above the cemento-enamel junction and 0.5 mm below the dentine-enamel junction）. Resin cements were applied on dentin surfaces and composite blocks were luted under constant seating pressure. Each group was divided into three subgroups according to time intervals. Specimens were sectioned to obtain sticks of 1 mm2 in diameter and subjected to microtensile bond strength testing at a cross head speed of 1 mrn/min. Both resin cements showed higher micro-tensile bond strength to superficial dentin than that to deep or cervical dentin （P 〈 0.001）. Micro-ten- sile bond strengths of Panavia F2.0 were higher than those of Multilink Sprint at different dentin regions （P 〈 0.001）. Immediate ＂micro-tensile bond strengths were higher than those of delayed micro-tensile bond strengths for both resin cements （P 〈 0.001）. It was concluded that resin cements with different chemical formulations and applications yield significantly different micro-tensile bond strengths to different dentin regions.展开更多
目的:研究一步法和两步法通用型粘接剂与不同双固化树脂水门汀匹配使用时,光固化模式对牙本质粘接强度的影响。方法:选用一步法通用型粘接剂Single Bond Universal(SBU)和两步法通用型粘接剂Opti Bond Versa(VSA)作为研究对象,以一步法...目的:研究一步法和两步法通用型粘接剂与不同双固化树脂水门汀匹配使用时,光固化模式对牙本质粘接强度的影响。方法:选用一步法通用型粘接剂Single Bond Universal(SBU)和两步法通用型粘接剂Opti Bond Versa(VSA)作为研究对象,以一步法自酸蚀粘接剂Opti Bond All in One(AIO)和两步法自酸蚀粘接剂Clearfil SE Bond(SEB)作为对照,同时选择Rely X Ultimate(RLX)和Nexus 3 Universal(NX3)作为不同的双固化树脂水门汀。收集新鲜无龋磨牙80颗,切除冠部釉质,暴露牙本质平面。根据粘接剂种类、粘接剂是否进行光固化和水门汀种类的不同组合分为16组,每组随机5颗。按照说明使用各组粘接剂,光固化(10 s)或者不进行光固化后,在粘接剂上方放置树脂水门汀厚度为1 mm,光照20 s(650 m W/cm^2),然后在水门汀上方分层填压复合树脂并固化(厚度5 mm)。水中储存24 h后,使用慢速切片机制备横截面积1 mm×1 mm的条形树脂-水门汀-牙本质样本,测定微拉伸粘接强度。结果:SBU光固化后与RLX和NX3联合使用,粘接强度[(35.45±7.04)MPa和(26.84±10.39)MPa]显著高于未光固化组[(17.93±8.93)MPa和(10.07±5.89)MPa,P<0.001]。SBU在相同光固化模式下,与RLX匹配使用的粘接强度显著高于与NX3匹配使用的粘接强度(P<0.05)。与对照AIO相比,SBU光固化后与RLX匹配使用时的粘接强度高于AIO组[(35.45±7.04)MPa vs.(24.86±8.42)MPa,P<0.05],而未光固化下SBU的粘接强度低于AIO组[(17.93±8.93)MPa vs.(22.28±7.57)MPa,P<0.05]。两步法通用型粘接剂VSA与对照粘接剂SEB在不同的光照模式及联合使用不同的水门汀各组之间的粘接强度(25.98~32.24 MPa)差异没有统计学意义(P>0.05)。结论:一步法通用型粘接剂的固化模式以及双固化水门汀的种类对于水门汀与牙本质的粘接强度均有一定的程度的影响。对于两步法通用型粘接系统,固化模式以及水门汀的种类对于水门汀与牙本质的粘接强度无显著影响。展开更多
目的:比较不同光照起始时间对自粘接树脂水门汀ClearfilTM SA Cement与牙本质的粘接强度及粘接界面微观形态的影响。方法:选取30颗新鲜拔除无龋损人磨牙,每个牙齿标本切取颊、舌侧牙本质试件片各1片,用树脂水门汀粘接处理后1,分别静置0...目的:比较不同光照起始时间对自粘接树脂水门汀ClearfilTM SA Cement与牙本质的粘接强度及粘接界面微观形态的影响。方法:选取30颗新鲜拔除无龋损人磨牙,每个牙齿标本切取颊、舌侧牙本质试件片各1片,用树脂水门汀粘接处理后1,分别静置0、15、30、45、60 s后光照固化;在SEM下观察其粘接界面;进行剪切强度测试。结果:自粘接树脂水门汀Clearf-ilTM SA Cement与牙本质的粘接强度随光固化起始时间的延长而增加:静置0 s为(10.09±3.20)MPa、15 s为(10.65±3.83)MPa、30 s为(11.12±4.09)MPa、45 s为(11.57±3.10)MPa、60 s为(11.67±4.08)MPa,但相差均不显著(P>0.05)。结论:0～60 s之间不同光固化起始时间对自粘接树脂水门汀ClearfilTM SA Cement与牙本质的粘接性能无显著影响。展开更多
目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组...目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组样本表面用磷酸酸蚀(A_(EH)组和B_(DH)组),另外一小组不酸蚀(A_E组和B_D组),用Rely X U200将各小组牙块与Vita MarkⅡ陶瓷进行粘接,测量其剪切强度,体视显微镜观察其断裂界面。结果:A_(EH)组和A_E组的剪切强度(MPa)分别为22.20±2.85和12.37±2.98(P<0.05),界面破坏分别为1例和5例,混合破坏分别为9例和5例;B_(DH)组和B_D组的剪切强度分别为7.30±2.43和10.71±2.02,界面破坏分别是8例和7例,混合破坏分别为2例和3例。结论:表面酸蚀可增强自粘接树脂水门汀与釉质的粘接强度,降低牙本质的粘接强度。牙釉质界面破坏主要为混合破坏,牙本质界面主要为粘接界面破坏。展开更多
文摘We sought to evaluate immediate and delayed micro-tensile bond strength of Panavia F2.0 and Multilink Sprint resin cement to superficial, deep and cervical dentin. Thirty-six freshly extracted non-carious human molars were sectioned in the mesiodistal direction to expose three different dentin regions including superficial dentin （1 mm below the dentine-enamel junction）, deep dentin （1 mm above the highest pulp horn） and cervical dentin （0.5 mm above the cemento-enamel junction and 0.5 mm below the dentine-enamel junction）. Resin cements were applied on dentin surfaces and composite blocks were luted under constant seating pressure. Each group was divided into three subgroups according to time intervals. Specimens were sectioned to obtain sticks of 1 mm2 in diameter and subjected to microtensile bond strength testing at a cross head speed of 1 mrn/min. Both resin cements showed higher micro-tensile bond strength to superficial dentin than that to deep or cervical dentin （P 〈 0.001）. Micro-ten- sile bond strengths of Panavia F2.0 were higher than those of Multilink Sprint at different dentin regions （P 〈 0.001）. Immediate ＂micro-tensile bond strengths were higher than those of delayed micro-tensile bond strengths for both resin cements （P 〈 0.001）. It was concluded that resin cements with different chemical formulations and applications yield significantly different micro-tensile bond strengths to different dentin regions.
文摘目的:研究一步法和两步法通用型粘接剂与不同双固化树脂水门汀匹配使用时,光固化模式对牙本质粘接强度的影响。方法:选用一步法通用型粘接剂Single Bond Universal(SBU)和两步法通用型粘接剂Opti Bond Versa(VSA)作为研究对象,以一步法自酸蚀粘接剂Opti Bond All in One(AIO)和两步法自酸蚀粘接剂Clearfil SE Bond(SEB)作为对照,同时选择Rely X Ultimate(RLX)和Nexus 3 Universal(NX3)作为不同的双固化树脂水门汀。收集新鲜无龋磨牙80颗,切除冠部釉质,暴露牙本质平面。根据粘接剂种类、粘接剂是否进行光固化和水门汀种类的不同组合分为16组,每组随机5颗。按照说明使用各组粘接剂,光固化(10 s)或者不进行光固化后,在粘接剂上方放置树脂水门汀厚度为1 mm,光照20 s(650 m W/cm^2),然后在水门汀上方分层填压复合树脂并固化(厚度5 mm)。水中储存24 h后,使用慢速切片机制备横截面积1 mm×1 mm的条形树脂-水门汀-牙本质样本,测定微拉伸粘接强度。结果:SBU光固化后与RLX和NX3联合使用,粘接强度[(35.45±7.04)MPa和(26.84±10.39)MPa]显著高于未光固化组[(17.93±8.93)MPa和(10.07±5.89)MPa,P<0.001]。SBU在相同光固化模式下,与RLX匹配使用的粘接强度显著高于与NX3匹配使用的粘接强度(P<0.05)。与对照AIO相比,SBU光固化后与RLX匹配使用时的粘接强度高于AIO组[(35.45±7.04)MPa vs.(24.86±8.42)MPa,P<0.05],而未光固化下SBU的粘接强度低于AIO组[(17.93±8.93)MPa vs.(22.28±7.57)MPa,P<0.05]。两步法通用型粘接剂VSA与对照粘接剂SEB在不同的光照模式及联合使用不同的水门汀各组之间的粘接强度(25.98~32.24 MPa)差异没有统计学意义(P>0.05)。结论:一步法通用型粘接剂的固化模式以及双固化水门汀的种类对于水门汀与牙本质的粘接强度均有一定的程度的影响。对于两步法通用型粘接系统,固化模式以及水门汀的种类对于水门汀与牙本质的粘接强度无显著影响。
文摘目的:比较不同光照起始时间对自粘接树脂水门汀ClearfilTM SA Cement与牙本质的粘接强度及粘接界面微观形态的影响。方法:选取30颗新鲜拔除无龋损人磨牙,每个牙齿标本切取颊、舌侧牙本质试件片各1片,用树脂水门汀粘接处理后1,分别静置0、15、30、45、60 s后光照固化;在SEM下观察其粘接界面;进行剪切强度测试。结果:自粘接树脂水门汀Clearf-ilTM SA Cement与牙本质的粘接强度随光固化起始时间的延长而增加:静置0 s为(10.09±3.20)MPa、15 s为(10.65±3.83)MPa、30 s为(11.12±4.09)MPa、45 s为(11.57±3.10)MPa、60 s为(11.67±4.08)MPa,但相差均不显著(P>0.05)。结论:0～60 s之间不同光固化起始时间对自粘接树脂水门汀ClearfilTM SA Cement与牙本质的粘接性能无显著影响。
文摘目的:研究对比磷酸酸蚀牙釉质与牙本质前后,Rely X U200自粘接树脂水门汀对Vita MarkⅡ陶瓷与牙的粘接强度。方法:分别制备20个牙釉质块(A组)和20个牙本质块(B组),各组随机分成2组;制备40个瓷块,随机分成4小组;从各组中随机抽取一小组样本表面用磷酸酸蚀(A_(EH)组和B_(DH)组),另外一小组不酸蚀(A_E组和B_D组),用Rely X U200将各小组牙块与Vita MarkⅡ陶瓷进行粘接,测量其剪切强度,体视显微镜观察其断裂界面。结果:A_(EH)组和A_E组的剪切强度(MPa)分别为22.20±2.85和12.37±2.98(P<0.05),界面破坏分别为1例和5例,混合破坏分别为9例和5例;B_(DH)组和B_D组的剪切强度分别为7.30±2.43和10.71±2.02,界面破坏分别是8例和7例,混合破坏分别为2例和3例。结论:表面酸蚀可增强自粘接树脂水门汀与釉质的粘接强度,降低牙本质的粘接强度。牙釉质界面破坏主要为混合破坏,牙本质界面主要为粘接界面破坏。
