Rosentritt, Martin and Schmid, Alois and Huber, Christina and Strasser, Thomas (2022) In Vitro Mastication Simulation and Wear Test of Virgilite and Advanced Lithium Disilicate Ceramics. INTERNATIONAL JOURNAL OF PROSTHODONTICS, 35 (6). pp. 770-776. ISSN 0893-2174, 1942-4426
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Purpose: To compare wear behavior, durability during in vitro mastication simulation, and fracture force of an established and a novel lithium disilicate CAD/CAM material, as well as to examine the impact of cementation and reduced ceramic thickness on durability and fracture force. Materials and Methods: Specimens (n = 8 per group) were prepared from lithium disilicate (LS2; IPS e.max, Ivoclar Vivadent) and advanced lithium disilicate (ALD; Cerec Tessera, Dentsply Sirona). Specimens were polished, and two-body wear test and thermocycling were performed (50 N, 120,000 cycles, 1.6 Hz, H2O dist., 5 degrees C/55 degrees C, 600 cycles). Maximum vertical loss, surface roughness, surface roughness depth, and antagonist wear were determined. Single crowns (n = 8 per group; thickness 1.5 mm/1.0 mm) were manufactured from LS2 and ALD and mounted on human molar teeth with adhesive resin (AB; CalibraCeram, Dentsply Sirona), glass-ionomer cement (GIC; Ketac Cem, 3M ESPE), and hybrid glass-ionomer cement (HGIC; Calibra Bio, Dentsply Sirona). Thermocycling and mechanical loading (2 x 3000 x 5 degrees C/55 degrees C, 2 minutes, H20 dist., 1.2 x 106 50 N) were performed. Fracture force was determined by a universal testing machine (1446, ZwickRoell), and one-way analysis and Bonferroni post hoc test (a = .05) were used for statistical analyses. Results: Mean (ALD: 210 +/- 42.4 pm; LS2: 264.3 +/- 56.1 pm) and maximum (ALD: 391.1 +/- 86.3 pm; LS2: 518.3 +/- 113.2 pm) wear between groups were significantly different (P <= .047). Fracture force varied between 1,911.4 +/- 468.4 N (ALD/AB 1 mm) and 2,995.3 +/- 880.6 N (LS2/GIC), without significant differences (P >= .152). Conclusion: ALD showed better wear behavior than LS2, but provided similar fracture force. Cementation and reduction of ceramic thickness had only minor effects on fracture force.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FRACTURE-RESISTANCE; MOLAR CROWNS; MONOLITHIC ZIRCONIA; DENTAL CERAMICS; HUMAN ENAMEL; PERFORMANCE; STRENGTH; COMPOSITE; THICKNESS; RESTORATIONS; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Nov 2023 07:57 |
| Last Modified: | 14 Nov 2023 07:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56642 |
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