LOAD BEARING CAPACITY OF FIBER-REINFORCED AND UNREINFORCED COMPOSITE RESIN CAD/CAM-FABRICATED FIXED DENTAL PROSTHESES

作者：Basaran Emine Goncu^*; Ayna Emrah; Vallittu Pekka K; Lassila Lippo V J

来源：Journal of Prosthetic Dentistry, 2013, 109(2): 88-94.

Statement of problem. It is unclear if fiber-reinforced fixed dental prostheses can be fabricated with physical properties that make them suitable for definitive prostheses. %26lt;br%26gt;Purpose. The purpose of this study was to compare the load bearing capacity of fiber-reinforced and unreinforced computer-aided design/computer-aided manufacturing (CAD/CAM) fabricated fixed dental prostheses. %26lt;br%26gt;Material and methods. Fixed dental prostheses were fabricated with CAD/CAM from 3 experimental fiber-reinforced composite resin blocks, 1 experimental composite resin block, and 1 commercially available composite resin block. The experimental fiber-reinforced composite resin was prepared by mixing dimethacrylate resin with filler particles of BaO silicate and E-glass fiber. Different ratios of resin, filler, and fiber were used to fabricate specimens measuring 15.5 x 19 x 39 mm, which were allocated to 5 different groups (n=8) and statically loaded until final fracture. Statistical analyses were calculated according to final fracture values. A 1-way ANOVA and the Tukey post hoc multiple comparison test were used (alpha=.05). %26lt;br%26gt;Results. All groups showed significantly different load-bearing capacities (P%26lt;.001). Experimental randomly oriented fiber-reinforced composite resin blocks revealed the highest load-bearing capacity (2163 +/- 246 N), whereas commercial composite resin blocks showed the lowest (1290 +/- 172 N). %26lt;br%26gt;Conclusions. Fixed partial dental prostheses consisting of experimental fiber-reinforced composite resin blocks showed higher load-bearing capacities than did unreinforced composite resin blocks. (J Prosthet Dent 2013;109:88-94)

• 出版日期2013-2