Rajeev Vini, Arunachalam Rajeev, Nayar Sanjna, Arunima P R, Ganapathy Sivadas, Vedam Vaishnavi
Department of Prosthodontics, AIMST University, Kedah, Malaysia.
Department of Periodontics, AIMST University, Kedah, Malaysia.
Eur J Dent. 2017 Jan-Mar;11(1):58-63. doi: 10.4103/ejd.ejd_113_16.
This study was designed to assess shear bond strength (SBS) of ormocer flowable (OF) resin as a luting agent, ormocer as an indirect veneer material with portrayal of modes of failures using scanning electron microscope (SEM).
Sixty maxillary central incisors were divided into Group I, II, and III with 20 samples each based on luting cement used. They were OF, self-adhesive (SA) cement, and total etch (TE) cement. These groups were subdivided into "a" and "b" of ten each based on the type of veneering materials used. Veneer discs were fabricated using Ormocer restorative (O) and pressable ceramic (C). Specimens were thermocycled and loaded under universal testing machine for SBS. The statistical analysis was done using one-way ANOVA Tukey honest significant difference method.
A significant difference was observed between the Groups I and II ( < 0.05). The highest mean bond strength when using ormocer veneer was obtained with the Group Ia (19.11 ± 1.92 Mpa) and lowest by Group IIa (8.1 ± 1.04 Mpa), whereas the highest mean bond strength while using ceramic veneer was of similar range for Group Ib (18.04 ± 4.08 Mpa) and Group IIIb (18.07 ± 1.40 Mpa). SEM analysis revealed OF and TE presented mixed type of failure when compared with SA where failure mode was totally adhesive.
OF was found equally efficient like TE. Bond strength of ormocer as a veneer was not inferior to ceramic making it one of the promising additions in the field of dentistry.
本研究旨在评估可流动有机陶瓷（OF）树脂作为粘接剂、有机陶瓷作为间接贴面材料的剪切粘接强度（SBS），并使用扫描电子显微镜（SEM）描绘失效模式。
60颗上颌中切牙根据所使用的粘接水门汀分为I组、II组和III组，每组20个样本。它们分别是OF、自粘接（SA）水门汀和全酸蚀（TE）水门汀。根据所使用的贴面材料类型，这些组又各自细分为“a”和“b”两组，每组10个。使用有机陶瓷修复体（O）和可压陶瓷（C）制作贴面圆盘。对样本进行热循环处理，并在万能试验机上加载以测试SBS。使用单因素方差分析和Tukey诚实显著差异法进行统计分析。
I组和II组之间观察到显著差异（<0.05）。使用有机陶瓷贴面时，Ia组获得的平均粘接强度最高（19.11±1.92兆帕），IIa组最低（8.1±1.04兆帕）；而使用陶瓷贴面时，Ib组（18.04±4.08兆帕）和IIIb组（18.07±1.40兆帕）的平均粘接强度范围相似。SEM分析显示，与SA相比，OF和TE呈现混合类型的失效，而SA的失效模式完全是粘接性的。
发现OF与TE同样有效。有机陶瓷作为贴面的粘接强度不低于陶瓷，使其成为牙科领域有前景的新增材料之一。
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