Application of a standard autoclaving protocol does not harm structural integrity of two-piece zirconia abutments under detachment force testing
| Autor: | Ralf J Baeppler, Frank P. Nothdurft, Andrej M. Kielbassa, Rüdiger Junker, Dieter Pils |
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| Rok vydání: | 2018 |
| Předmět: |
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 |
| Zdroj: | Clinical oral investigations. 23(7) |
| ISSN: | 1436-3771 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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