We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Biomechanical evaluation of a microstructured zirconia implant by a removal torque comparison with a standard Ti- SLA implant.
- Authors
Bormann, Kai‐Hendrik; Gellrich, Nils‐Claudius; Kniha, Heinz; Dard, Michel; Wieland, Marco; Gahlert, Michael
- Abstract
Objectives The purpose of this study was to evaluate the biomechanical bone tissue response to novel microstructured zirconia implants in comparison to sandblasted and acid-etched ( SLA) titanium implants through the analysis of removal torque ( RTQ) measurements. Materials and methods Ti- SLA implants with a sandblasted, large-grit and acid-etched surface were compared with zirconia implants with an acid-etched surface. All implants had the same shape, a diameter of 4.1 mm and a length of 10 mm. A total of 136 implants were placed in the maxillae of 17 miniature pigs. Six animals were sacrificed after both 4 and 8 weeks and five animals were sacrificed after 12 weeks, thus providing a total of 102 implants for RTQ testing (34 implants were reserved for future histological analysis). The RTQ analysis was successfully performed, using a mixed model regression with P-values calculated using the nonparametric Brunner-Langer method, on 100 of the 102 implants, two were excluded from the analysis. Results The adjusted mean RTQ values for Ti- SLA implants were 131 Ncm (95% CI: 107-155) at 4 weeks, 128 Ncm (108-148) Ncm at 8 weeks, and 180 Ncm (153-207 Ncm) at 12 weeks of healing, whereas RTQ values for the zirconia implants were 110 Ncm (86-134), 97 Ncm (76-118) and 147 Ncm (121-174) at the corresponding time intervals. A comparison of the implant materials resulted in P-values of P = 0.114 at 4 weeks, P = 0.034 at 8 weeks and P = 0.105 at 12 weeks (significance set at P < 0.05). Conclusions Within the limits of the present study, it could be confirmed that the biomechanical bone-tissue response of the investigated zirconia implants is non-inferior to that of the well-documented, roughened titanium surface, at each time point, within the set tolerance. There were no statistically significant differences between the two materials after a healing period of 4 and 12 weeks. The RTQ values of both implant types increased significantly from the 8-week to the 12-week time point.
- Subjects
BIOMECHANICS; MICROSTRUCTURE; ZIRCONIUM oxide; ARTIFICIAL implants; TORQUE; BONES; REGRESSION analysis
- Publication
Clinical Oral Implants Research, 2012, Vol 23, Issue 10, p1210
- ISSN
0905-7161
- Publication type
Article
- DOI
10.1111/j.1600-0501.2011.02291.x