Application of a standard autoclaving protocol does not harm structural integrity of two-piece zirconia abutments under detachment force testing
- Resource Type
- Authors
- Ralf J Baeppler; Frank P. Nothdurft; Andrej M. Kielbassa; Rüdiger Junker; Dieter Pils
- Source
- Clinical oral investigations. 23(7)
- Subject
- Dental Stress Analysis
Titanium
Materials science
business.industry
Structural integrity
Dentistry
Sterilization
Thermal aging
Dental Abutments
Dental Implant-Abutment Design
030206 dentistry
03 medical and health sciences
0302 clinical medicine
030220 oncology & carcinogenesis
Ultimate tensile strength
Materials Testing
Cubic zirconia
Implant
Zirconium
business
General Dentistry
Resin cement
- Language
- ISSN
- 1436-3771
Aim was to assess the influence of a standard autoclaving protocol on the retention of zirconia abutments glued on titanium bases in two-piece implant abutments. Twenty-four CAD/CAM-generated zirconia abutments were adhesively cemented on prefabricated titanium bases. Before mechanical and thermal aging, the specimens were divided into two groups. Group 1 was subjected to a standard steam autoclaving protocol and Group 2 remained untreated (control). The tensile strength in all specimens was evaluated by a standardized pull-off test limited to a maximum force of 1000 N. Eleven samples in both groups could be subjected to pull-off testing. Ten samples in Group 1 and three samples in Group 2 failed, while all others reached the maximum pull-off force. This difference was statistically significant. The mean retention values for the failed samples were 694.53 ± 369.10 N in Group 1 and 890.78 ± 25.90 N in Group 2. This difference was not statistically significant. A standard autoclaving protocol does not reduce detachment force of two-piece zirconia abutments. Clinical sterilization processes as recommended by regulatory authorities seem to be harmless to the structural integrity of two-piece zirconia implant abutments, at least with regard to the retention of the components.