Leles C R, Machado A L, Vergani C E, Giampaolo E T, Pavarina A C
Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Araraquara Dental School, Araraquara, SP, Brazil.
J Oral Rehabil. 2001 Dec;28(12):1153-7. doi: 10.1046/j.1365-2842.2001.00786.x.
Direct relining of dentures made with hard chairside reline resins is faster than laboratory-processed reline systems and the patient is not without the prosthesis for the time necessary to perform the laboratory procedures. However, a weak bond between the autopolymerizing acrylic reline resins and the denture base material has been observed. This study evaluated the effect of six different surface treatments on the bond strength between a hard chairside reline acrylic resin and a heat-cured acrylic resin. Specimens of the heat-cured acrylic resin were divided into seven groups. One of these groups remained intact. In the other groups, a 10-mm square section was removed from the centre of each specimen. The bonding surfaces were then treated with (i) methyl methacrylate monomer, (ii) isobutyl methacrylate monomer, (iii) chloroform, (iv) acetone, (v) experimental adhesive and (vi) no surface treatment -- control group. Kooliner acrylic resin was packed into the square sections and polymerized. The bonding strength was evaluated by a three-point loading test. The results were submitted to one-way analysis of variance (ANOVA) followed by a Tukey multiple range test at a 5% level of significance. No significant difference was found between the surface treatment with Lucitone 550 monomer or chloroform, but both were stronger than the majority of the other groups. The bond strength provided by all the surface treatments was lower than that of the intact heat-cured resin.
使用硬质椅旁重衬树脂直接重衬假牙比实验室加工的重衬系统更快，并且患者无需在进行实验室程序所需的时间内没有假牙。然而，已观察到自凝丙烯酸重衬树脂与假牙基托材料之间的粘结力较弱。本研究评估了六种不同表面处理对硬质椅旁重衬丙烯酸树脂与热固化丙烯酸树脂之间粘结强度的影响。将热固化丙烯酸树脂试件分为七组。其中一组保持完整。在其他组中，从每个试件的中心去除一个10毫米见方的部分。然后对粘结表面进行如下处理：（i）甲基丙烯酸甲酯单体，（ii）异丁基丙烯酸甲酯单体，（iii）氯仿，（iv）丙酮，（v）实验性粘合剂，（vi）不进行表面处理——对照组。将Kooliner丙烯酸树脂填充到方形部分并聚合。通过三点加载试验评估粘结强度。结果进行单因素方差分析（ANOVA），然后进行5%显著性水平的Tukey多重范围检验。使用Lucitone 550单体或氯仿进行表面处理之间未发现显著差异，但两者均强于大多数其他组。所有表面处理提供的粘结强度均低于完整热固化树脂的粘结强度。
