Holanda Daniel Brandão Vilela, França Fabiana Mantovani Gomes, do Amaral Flávia Lucisano Botelho, Flório Flávia Martão, Basting Roberta Tarkany
Department of Restorative Dentistry, Dental School and Institute and Research Center São Leopoldo Mandic, Campinas, Sao Paulo, Brazil.
Department of Preventive and Social Dentistry, Dental School and Institute and Research Center São Leopoldo Mandic, Campinas, Sao Paulo, Brazil.
J Conserv Dent. 2013 Nov;16(6):536-9. doi: 10.4103/0972-0707.120965.
to evaluate the influence of preheating the bonding agent (Scotchbond Multipurpose Adhesive/3M ESPE) and the light-activated resin cement (RelyX Venner/3M ESPE) on dentin microtensile bond strength.
The exposed flat dentin surface of 40 human third molars were randomly distributed into four groups for cementation (SR Adoro/Ivoclar Vivadent) (n = 10): G1-bond and resin cement, both at room temperature (22°C), G2-bond preheated to 58°C and cement at room temperature (22°C), G3-bond at room temperature (22°C) and the cement preheated to 58°C, G4-bond preheated to 58°C and cement preheated to 58°C. Sticks of dentin/block set measuring approximately 1 mm(2) were obtained and used for the microtensile bond strength test. All sticks had their failure mode classified.
Factorial analysis of variance was applied, 2 × 2 (bond × cement) (P < 0.05).
Preheating the bonding agent (P = 0.8411) or the cement (P = 0.7155), yielded no significant difference. The interaction bond × cement was not significant (P = 0.9389).
Preheating the bond and/or the light-activated resin cement did not influence dentin bond strength or fracture failure mode.
评估预热粘结剂（Scotchbond多功能粘结剂/3M ESPE）和光固化树脂水门汀（RelyX Venner/3M ESPE）对牙本质微拉伸粘结强度的影响。
将40颗人第三磨牙暴露的平坦牙本质表面随机分为四组进行粘结（SR Adoro/Ivoclar Vivadent）（n = 10）：G1组——粘结剂和树脂水门汀均处于室温（22°C）；G2组——粘结剂预热至58°C，树脂水门汀处于室温（22°C）；G3组——粘结剂处于室温（22°C），树脂水门汀预热至58°C；G4组——粘结剂预热至58°C，树脂水门汀预热至58°C。制备出尺寸约为1平方毫米的牙本质棒/块用于微拉伸粘结强度测试。对所有牙本质棒的断裂模式进行分类。
采用2×2（粘结剂×树脂水门汀）析因方差分析（P < 0.05）。
预热粘结剂（P = 0.8411）或树脂水门汀（P = 0.7155）均未产生显著差异。粘结剂×树脂水门汀的交互作用不显著（P = 0.9389）。
预热粘结剂和/或光固化树脂水门汀不会影响牙本质粘结强度或断裂破坏模式。
