Department of Prosthodontics, Faculty of Dentistry, Inonu University, Malatya, Turkey.
Eur J Oral Sci. 2022 Dec;130(6):e12901. doi: 10.1111/eos.12901. Epub 2022 Nov 25.
The aim of this study was to compare the marginal and internal adaptation of three-unit fixed dental prostheses (FDPs) fabricated from different metal-free materials using CAD/CAM methods. A total of 100 three-unit FDPs were produced from a cubic zirconia, a fiber-reinforced resin composite, a polyetheretherketone (PEEK), a polyetherketoneketone (PEKK), and a polymer composite material by the CAD/CAM method (n = 20 per material). The zirconia group was considered the control/reference material. Marginal and internal gap values of the produced FDPs were measured using the silicone replica method at ×40 magnification under a stereomicroscope. The obtained data were analyzed using one-way ANOVA and Tukey's HSD tests. The marginal and internal gap values for the cubic zirconia material were found to be statistically significantly lower than those seen for the PEEK, polymer composite, PEKK, and fiber-reinforced resin composite materials. While the marginal and internal adaptation of the cubic zirconia material was found to be better than the others, it should be noted that the marginal and internal gap values for all other materials tested were found to be within the clinically acceptable range.
本研究旨在比较使用 CAD/CAM 方法制造的三种不同无金属材料的单位固定义齿（FDP）的边缘和内部适应性。通过 CAD/CAM 方法共制作了 100 个由立方氧化锆、纤维增强树脂复合材料、聚醚醚酮（PEEK）、聚醚酮酮（PEKK）和聚合物复合材料制成的三单位 FDP（每种材料 20 个）。氧化锆组被认为是对照/参考材料。使用硅橡胶印模法在体视显微镜下以×40 放大倍数测量生产的 FDP 的边缘和内部间隙值。使用单向方差分析和 Tukey 的 HSD 检验对获得的数据进行分析。结果发现，立方氧化锆材料的边缘和内部间隙值明显低于 PEEK、聚合物复合材料、PEKK 和纤维增强树脂复合材料。虽然立方氧化锆材料的边缘和内部适应性被认为优于其他材料，但需要注意的是，所有其他测试材料的边缘和内部间隙值都在临床可接受范围内。
