The Effect of Surface Treatments on Microhardness and Flexure Strength of Resin Ceramics. | ||
| Al-Azhar Journal of Dental Science | ||
| Article 11, Volume 23, Issue 1, January 2020, Pages 73-78 PDF (226.58 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajdsm.2020.108467 | ||
| Abstract | ||
| Objective: The objective of this study was intended for evaluation the effect of different surface treatments on microhardness and flexural strength of two types of resin ceramics. Materials and Methods: A total number of 140 samples were used in this study (70 samples for each test). This samples were divided into two equal groups according to materials (Vita Enamic [ENA] and Lava Ultimate [LVU]), then each group was subdivided according surface treatments into five subgroups Gr 1; no surface treatment (control), Gr 2; alumina particles with size (50µm) for sandblasting, Gr 3; alumina particles with size (110µm) for sandblasting, Gr 4; etching by plasma technology, Gr 5; etching by hydrofluoric acid (n=7). Microhardness was measured by using Digital Display Vickers Microhardness Tester andflexure strength by using Universal Testing Machine. Results: The results of this study revealed that; Control group of ENA recorded statistically significant highest microhardness. Control group of LVU recorded statistically significant highest flexure strength. Conclusion: Surface treatment has adverse effect on microhardness and flexure strength of both resin ceramic materials. | ||
| Keywords | ||
| Key Words: Resin ceramics; Microhardness; Flexural strength; Alumina particles; plasma | ||
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