An in vitro evaluation of fracture load of implant-supported zirconia-based prostheses fabricated with different veneer materials

作者：Takata Hiroki; Komine Futoshi^*; Honda Junichi; Blatz Markus B; Matsumura Hideo

来源：Clinical Oral Implants Research, 2018, 29(4): 396-403.

DOI：10.1111/clr.13135

• fracture resistance
• implant-supported prostheses
• veneer
• zirconia framework

ObjectivesThe purpose of this in vitro study was to evaluate fracture loads of implant-supported zirconia-based prostheses fabricated with different veneer materials (resin-based material and lithium disilicate ceramics).
Material and methodsForty-four zirconia-based molar prostheses were fabricated on dental implants and divided into four groups (n=11): zirconia-based prostheses veneered with feldspathic porcelain (ZVF), zirconia-based prostheses bonded with the lithium disilicate glass-ceramic veneer (ZBD), zirconia-based prostheses veneered with indirect composite resin (ZVC), and zirconia-based prostheses bonded with composite materials fabricated from a CAD/CAM resin block (ZBC). The zirconia-based prostheses and abutments were adhesively bonded with a dual-polymerized resin-based luting material. Fracture load was determined using compression load to the prostheses with a universal testing machine. The data were analyzed with one-way analysis of variance (ANOVA) and Tukey's HSD test (=.05).
ResultsThe mean fracture load was significantly higher in the ZBC group (3.95 kN) than in the ZVC group (3.28 kN). No significant difference in fracture load was found among the ZVF (3.52 kN), ZBD (3.48 kN), and ZVC groups.
ConclusionsThe adhesively bonded veneering technique enhances fracture resistance of implant-supported zirconia-based prostheses fabricated with a resin-based material. All implant-supported zirconia-based restorations tested should resist physiologic masticatory forces in the oral environment.

• 出版日期2018-4