Effect of framework design on fracture load after thermal cycling and mechanical loading of implant-supported zirconia-based prostheses
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- KOMINE Futoshi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- KAMIO Shingo
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- TAKATA Hiroki
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- YAGAWA Shogo
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- TAGUCHI Serina
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- TAGUCHI Kohei
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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- HASHIGUCHI Akiko
- Private Practice, Oshima Dental Clinic
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- MATSUMURA Hideo
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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Abstract
<p>This study evaluated the effect of zirconia framework design on fracture load of implant-supported zirconia-based prostheses after thermal cycling and mechanical loading. Three different zirconia framework designs were investigated: uniform-thickness (UNI), anatomic (ANA), and supported anatomic (SUP) designs. Each framework was layered with feldspathic porcelain (ZAC group) or indirect composite material (ZIC group). The specimens then underwent fracture load testing after thermal cycling and cyclic loading. In the ZAC group, mean fracture load was significantly lower for UNI design specimens than for the other framework designs. In the ZIC group, there was no significant difference in mean fracture load between ANA design specimens and either UNI or SUP design specimens. To improve fracture resistance of implant-supported zirconia-based prostheses after artificial aging, uniformly thick layering material and appropriate lingual support with zirconia frameworks should be provided.</p>
Journal
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- Dental Materials Journal
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Dental Materials Journal 37 (1), 78-86, 2018
The Japanese Society for Dental Materials and Devices