da Silva Luciana Mendonça, Andrade Andréa Mello de, Machuca Melissa Fernanda Garcia, da Silva Paulo Maurício Batista, da Silva Ricardo Virgolino C, Veronezi Maria Cecília
Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil.
J Appl Oral Sci. 2008 May-Jun;16(3):232-5. doi: 10.1590/s1678-77572008000300013.
This in vitro study evaluated the tensile bond strength of glass fiber posts (Reforpost - Angelus-Brazil) cemented to root dentin with a resin cement (RelyX ARC - 3M/ESPE) associated with two different adhesive systems (Adper Single Bond - 3M/ESPE and Adper Scotchbond Multi Purpose (MP) Plus - 3M/ESPE), using the pull-out test. Twenty single-rooted human teeth with standardized root canals were randomly assigned to 2 groups (n=10): G1- etching with 37% phosphoric acid gel (3M/ESPE) + Adper Single Bond + #1 post (Reforpost - Angelus) + four #1 accessory posts (Reforpin - Angelus) + resin cement; G2- etching with 37% phosphoric acid gel + Adper Scotchbond MP Plus + #1 post + four #1 accessory posts + resin cement. The specimens were stored in distilled water at 37 degrees C for 7 days and submitted to the pull-out test in a universal testing machine (EMIC) at a crosshead speed of 0.5 mm/min. The mean values of bond strength (kgf) and standard deviation were: G1- 29.163 +/- 7.123; G2- 37.752 +/-13.054. Statistical analysis (Student's t-test; a=0.05 showed no statistically significant difference (p<0.05) between the groups. Adhesive bonding failures between resin cement and root canal dentin surface were observed in both groups, with non-polymerized resin cement in the apical portion of the post space when Single Bond was used (G1). The type of adhesive system employed on the fiber post cementation did not influence the pull-out bond strength.
本体外研究使用拔出试验评估了用树脂水门汀（RelyX ARC - 3M/ESPE）粘结到根管牙本质上的玻璃纤维桩（Reforpost - Angelus - 巴西）与两种不同粘结系统（Adper单组分粘结剂 - 3M/ESPE和Adper Scotchbond多功能（MP）加强型 - 3M/ESPE）的拉伸粘结强度。将20颗具有标准化根管的单根人牙随机分为2组（n = 10）：G1组用37%磷酸凝胶（3M/ESPE）酸蚀 + Adper单组分粘结剂 + #1桩（Reforpost - Angelus） + 4根#1辅助桩（Reforpin - Angelus） + 树脂水门汀；G2组用37%磷酸凝胶酸蚀 + Adper Scotchbond MP加强型 + #1桩 + 4根#1辅助桩 + 树脂水门汀。标本在37℃蒸馏水中储存7天，然后在万能试验机（EMIC）上以0.5 mm/min的十字头速度进行拔出试验。粘结强度（kgf）的平均值和标准差为：G1组 - 29.163±7.123；G2组 - 37.752±13.054。统计分析（Student t检验；α = 0.05）显示两组之间无统计学显著差异（p < 0.05）。两组均观察到树脂水门汀与根管牙本质表面之间的粘结失败，使用单组分粘结剂时（G1组）桩道根尖部分存在未聚合的树脂水门汀。纤维桩粘结时使用的粘结系统类型对拔出粘结强度无影响。
