Marginal adaptation and fracture resistance of 3D-printed and CAD/CAM-milled definitive resin matrix ceramic crowns.
| Autor: | Abdulkareem MA, Al-Shamma AMW |
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| Jazyk: | angličtina |
| Zdroj: | International journal of computerized dentistry [Int J Comput Dent] 2024 Dec 09; Vol. 27 (4), pp. 355-363. |
| DOI: | 10.3290/j.ijcd.b4494301 |
| Abstrakt: | Aim: To evaluate and compare the marginal adaptation and fracture resistance of resin matrix ceramic crowns fabricated using 3D printing and CAD/CAM milling technology. Materials and Methods: Thirty extracted human maxillary first premolars were prepared to receive crown restorations and grouped into three groups according to different crown materials used (n = 10): 1) VE: teeth restored with CAD/CAM-milled Vita Enamic; 2) CS: teeth restored with CAD/CAM-milled Cerasmart 270; VSC: teeth restored with 3D-printed VarseoSmile Crown plus. Marginal analysis was performed with the aid of a digital microscope at 230x magnification both before and after cementation with self-adhesive resin cement, and analyzed with ImageJ analysis software. The fracture loads for each sample were then recorded using a universal testing machine in a single load-to-failure test up until crown failure. Results: The lowest marginal gap values were recorded for VSC before (8.03 μm) and after (15.07 μm) cementation, with a significant difference compared with the other crown materials (P 0.05), while the differences between the CAD/CAM-milled groups were not significant, both before (CS [11.35 μm] and VE [11.86 μm]) and after (CS [20.01 μm] and VE [21.08 μm]) cementation. In terms of fracture resistance, the crowns fabricated from VE recorded significantly lower fracture load values (727.8 N; P 0.05) than those fabricated from CS (1213.8 N) and VSC (1181.5 N), which showed no statistically significant differences from each other. Conclusion: 3D-printed definitive crowns outperformed CAD/CAM-milled crowns in terms of marginal adaptation and showed comparable fracture resistance values. |
| Databáze: | MEDLINE |
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