Premium
Influence of Preparation and Wall Thickness on the Resistance to Fracture of Zirconia Implant Abutments
Author(s) -
Att Wael,
Yajima NaoDaniel,
Wolkewitz Martin,
Witkowski Siegbert,
Strub Joerg Rudolf
Publication year - 2012
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/j.1708-8208.2011.00428.x
Subject(s) - materials science , cubic zirconia , implant , dentistry , universal testing machine , titanium , masticatory force , orthodontics , composite material , ceramic , ultimate tensile strength , medicine , metallurgy , surgery
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.