Pereira Jefferson Ricardo, da Rosa Ricardo Abreu, do Valle Accácio Lins, Ghizoni Janaina Salomon, Só Marcus Vinicius Reis, Shiratori Fábio Kenji
Associate Clinical Professor and Research Coordinator, Department of Prosthodontics, Dental School, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil.
Doctoral student, Department of Conservative Dentistry, Rio Grande do Sul Federal University, Porto Alegre, Brazil.
J Prosthet Dent. 2014 Jul;112(1):59-63. doi: 10.1016/j.prosdent.2013.10.009. Epub 2014 Jan 11.
Glass fiber posts are commonly used to provide adequate support and retention for the restoration of endodontically treated teeth, but their resistance to dislodgement depends on their adhesion to root dentin.
The purpose of this study was to assess the effect of cement type on the pull-out bond strength of fiber posts.
Seventy maxillary canines were endodontically treated and then divided into 7 groups according to the cement used for fiber post cementation as follows (n = 10): RelyX Unicem, BisCem, RelyX Luting 2, RelyX ARC, Panavia F, Enforce, and Allcem. The specimens were subjected to a pull-out bond strength test in a universal testing machine at a crosshead speed of 0.5 mm/min. The results, in newtons, were analyzed with 1-way ANOVA and the Tukey post hoc test (α = .05).
RelyX Unicem (472.3 ± 8.9 N), BisCem (506.6 ± 9.2 N), RelyX ARC (498.0 ± 8.2 N), Panavia F (502.3 ± 7.0 N), and Allcem (470.0 ± 11.3 N) presented significantly higher bond strength than RelyX Luting 2 (241.8 ± 9.70 N) and Enforce (309.5 ± 6.3 N) cements (mean ± SD; P < .05).
Except for Enforce, all resin cements produced pull-out bond strength values twice that of resin modified glass ionomer cement. However, all cements promoted adequate retention to fiber posts to withstand functional loads.
玻璃纤维桩常用于为根管治疗后的牙齿修复提供足够的支撑和固位，但它们的抗脱位能力取决于其与牙根牙本质的黏附力。
本研究的目的是评估黏固剂类型对纤维桩拔出粘结强度的影响。
选取70颗上颌尖牙进行根管治疗，然后根据用于纤维桩粘结的黏固剂分为7组，如下所示（n = 10）：RelyX Unicem、BisCem、RelyX Luting 2、RelyX ARC、Panavia F、Enforce和Allcem。在万能试验机上以0.5 mm/min的十字头速度对样本进行拔出粘结强度测试。以牛顿为单位的结果采用单因素方差分析和Tukey事后检验进行分析（α = 0.05）。
RelyX Unicem（472.3 ± 8.9 N）、BisCem（506.6 ± 9.2 N）、RelyX ARC（498.0 ± 8.2 N）、Panavia F（502.3 ± 7.0 N）和Allcem（470.0 ± 11.3 N）的粘结强度显著高于RelyX Luting 2（241.8 ± 9.70 N）和Enforce（309.5 ± 6.3 N）黏固剂（平均值±标准差；P < 0.05）。
除Enforce外，所有树脂黏固剂产生的拔出粘结强度值是树脂改性玻璃离子黏固剂的两倍。然而，所有黏固剂都能为纤维桩提供足够的固位力以承受功能负荷。
