Influence of Preparation and Wall Thickness on the Resistance to Fracture of Zirconia Implant Abutments
Version of Record online: 16 DEC 2011
© 2011 Wiley Periodicals, Inc.
Clinical Implant Dentistry and Related Research
Special Issue: Clinical Implant Dentistry and Related Research Prosthodontic Supplement 2012: Contemporary Insight Into Implant Prosthodontics
Volume 14, Issue Supplement s1, pages e196–e203, May 2012
How to Cite
Att, W., Yajima, N.-D., Wolkewitz, M., Witkowski, S. and Strub, J. R. (2012), Influence of Preparation and Wall Thickness on the Resistance to Fracture of Zirconia Implant Abutments. Clinical Implant Dentistry and Related Research, 14: e196–e203. doi: 10.1111/j.1708-8208.2011.00428.x
- Issue online: 10 MAY 2012
- Version of Record online: 16 DEC 2011
- ceramic abutments;
- dental implant;
- wall thickness preparation;
Background: Studies about the effect of grinding procedures as well as material thickness on the resistance of zirconia implant abutments are in short supply.
Purpose: This study evaluated the effect of wall thickness as well as preparation on the resistance of zirconia implant abutments.
Materials and Method: Sixty-four implants received titanium (group Ti) and zirconia abutments (groups Zr-8, Zr-18, and Zr-1). The abutments of group Zr-8 had a 0.8-mm wall thickness, whereas the wall thickness of group Zr-18 was reduced by preparation from 1 mm to 0.8 mm. The abutments of group Zr-1 had a wall thickness of 1 mm. Standardized maxillary central incisor metal crowns were cemented on all abutments. All specimens were then tested in a universal testing machine for their resistance to fracture before and after masticatory simulation (n = 8).
Results: The median resistance to fracture values (N) before and after aging were, respectively: group Ti: 500–504; group Zr-8: 487–491; group Zr-18: 490-451; and group Zr-1: 519-480. No significant effects of group, aging, or combinations were found (p > .05).
Conclusion: All tested abutments have the potential to withstand physiologic occlusal forces in the anterior region (>200 N). The applicability of the results to other implant systems should be verified.