Jaikumar R Arun, Karthigeyan Suma, Ali Syed Asharf, Naidu N Madhulika, Kumar R Pradeep, Vijayalakshmi K
Department of Prosthodointics, Rajah Mutiah Dental College, Chidambaram, Tamil Nadu, India.
Department of Oral Medicine and Radiology, Indira Gandhi Institute of Dental Sciences, Puducherry, India.
J Pharm Bioallied Sci. 2015 Aug;7(Suppl 2):S461-4. doi: 10.4103/0975-7406.163505.
The aim of this study was to evaluate whether the flexural strength of a commercially available, heat polymerized acrylic denture base material could be improved using reinforcements.
A total of 30 specimens (65 mm × 10 mm × 3 mm) were fabricated; the specimens were divided into three groups with 10 specimens each. They were Group 1 - conventional denture base resins, Group 2 - high impact denture base resins, and Group 3 - glass reinforced denture base resins. The specimens were loaded until failure on a three-point bending test machine. An one-way analysis of variance was used to determine statistical differences among the flexural strength of three groups. Data were analyzed by SPSS software version 21.0© (IBM Corporation, Armonk, NY, USA) and the results were obtained.
The flexural strength values showed statistically significant differences among experimental groups (P < 0.005).
Within the limitations of the study polymethyl methacrylate (PMMA) reinforced with glass fibers showed the highest flexural strength values this was followed by PMMA reinforced with butadiene styrene, and the least strength was observed in the conventional denture base resins.
本研究旨在评估使用增强材料是否能提高市售热聚合丙烯酸义齿基托材料的抗弯强度。
共制作30个试件（65毫米×10毫米×3毫米）；将试件分为三组，每组10个。分别为第1组——传统义齿基托树脂，第2组——高抗冲义齿基托树脂，第3组——玻璃纤维增强义齿基托树脂。在三点弯曲试验机上对试件加载直至破坏。采用单因素方差分析来确定三组抗弯强度之间的统计学差异。数据通过SPSS 21.0软件（美国纽约州阿蒙克市IBM公司）进行分析并得出结果。
实验组之间的抗弯强度值显示出统计学显著差异（P < 0.005）。
在本研究的局限性内，玻璃纤维增强的聚甲基丙烯酸甲酯（PMMA）表现出最高的抗弯强度值，其次是丁二烯苯乙烯增强的PMMA，传统义齿基托树脂的强度最低。
