Belwalkar Vaibhavi Ramkrishna, Gade Jaykumar, Mankar Nikhil Purushottam
Department of Prosthodontics and Implantology, Pacific Academy of Health Education and Research Center, Udaipur, India.
Department of Prosthodontics and Implantology, Swargiya Dadasaheb Kalmegh Smriti Dental College, Nagpur, Maharashtra, India.
Contemp Clin Dent. 2016 Apr-Jun;7(2):193-7. doi: 10.4103/0976-237X.183056.
Loss of retention has been cited to be the most common cause of the failure of postretained restoration with irreversible consequences when materials with different compositions are in intimate contact at the post/adhesive interface. With this background, a study was conducted to improve the adhesion at the resin phase of fiber posts using silane and other chemical pretreatments.
Hundred glass fiber-reinforced posts were tested with 4 different protocols (n = 25) using silane as a control (Group A) and other three experimental groups, namely, Group B-20% potassium permanganate, Group C-4% hydrofluoric acid, and Group D-10% hydrogen peroxide were pretreated on the postsurface followed by silanization. These specimens were bonded with dual-polymerizing resin-based luting agent, which were then loaded at the crosshead speed of 1 mm/min to record the shear bond strength at the post/adhesive interface. The data were analyzed using one-way ANOVA test for multiple group comparisons and the post hoc Bonferroni test for pairwise comparisons (P < 0.05).
Group B showed more influence on the shear bond strength when compared to other protocols, respectively (P < 0.001).
Alone silanization as a surface treatment did not improve the bond strength. Combination of chemical presurface treatments followed by silanization significantly enhanced the bond strength at the post/adhesive interface.
当不同成分的材料在桩/粘结剂界面紧密接触时，固位丧失被认为是桩核修复失败的最常见原因，会产生不可逆的后果。在此背景下，开展了一项研究，以通过硅烷和其他化学预处理来提高纤维桩树脂相的粘结力。
采用4种不同方案对100根玻璃纤维增强桩进行测试（每组n = 25），以硅烷处理作为对照（A组），其他三个实验组分别为：B组 - 20%高锰酸钾、C组 - 4%氢氟酸、D组 - 10%过氧化氢，先对桩表面进行预处理，然后进行硅烷化处理。这些样本用双固化树脂粘结剂粘结，之后以1 mm/min的十字头速度加载，以记录桩/粘结剂界面的剪切粘结强度。使用单因素方差分析进行多组比较，并使用事后Bonferroni检验进行两两比较（P < 0.05）来分析数据。
与其他方案相比，B组对剪切粘结强度的影响更大（P < 0.001）。
单独进行硅烷化表面处理并不能提高粘结强度。化学表面预处理后再进行硅烷化处理的组合显著提高了桩/粘结剂界面的粘结强度。
