Yilmaz, Burak; Alsaery, Amani; Bowen, Luke; Abou-Ayash, Samir; Seghi, Robert (2023). Influence of cyclic loading on load-to-failure of different ceramic CAD-CAM implant-supported single crowns. The international journal of prosthodontics, 36(1), 42–48. Quintessence Publishing 10.11607/ijp.6510
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PURPOSE
To compare the load to failure values of different ceramic CAD/CAM implant crown materials with drilled screw access holes with and without cyclic loading applied.
MATERIALS AND METHODS
Forty zirconia abutments with a titanium base were pre-loaded onto implants to support maxillary right first premolar crowns that were milled from four different CAD/CAM ceramic materials (zirconia reinforced lithium silicate, hybrid ceramic, lithium disilicate, and zirconia; n = 10 each). After cementing the crowns, screw access channels were prepared by drilling through occlusal surfaces. Half of the specimens were subjected to cyclic loading for 5 million cycles at 2 Hz (n = 5/material). After cyclic loading, vertical loads were applied to failure, and the load to failure values of all crowns were recorded and statistically analyzed. Two-way analysis of variance was used with restricted maximum likelihood estimation and Tukey-Kramer adjustments (α = .05).
RESULTS
During cyclic loading, the zirconia abutment in one lithium disilicate specimen cracked at 2 million cycles, as well as a zirconia-reinforced lithium silicate crown. Results for the load to failure test series showed statistical differences between the materials. Zirconia resulted in significantly higher failure loads when compared to the other materials (P < .001). Cyclic loading did not significantly affect the load to failure values.
CONCLUSION
Cyclic loading did not significantly influence the load to failure of any of the materials tested. Zirconia crowns with drilled screw access channels cemented on zirconia abutments with a titanium base had higher load to failure values compared to the other ceramic crown materials.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology 04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry |
UniBE Contributor: |
Yilmaz, Burak, Abou-Ayash, Samir |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1942-4426 |
Publisher: |
Quintessence Publishing |
Language: |
English |
Submitter: |
Tina Lauper |
Date Deposited: |
04 May 2021 10:14 |
Last Modified: |
14 Mar 2023 00:10 |
Publisher DOI: |
10.11607/ijp.6510 |
PubMed ID: |
33651042 |
BORIS DOI: |
10.7892/boris.153458 |
URI: |
https://boris.unibe.ch/id/eprint/153458 |
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