Abstract
Purpose: The aim of this study was to evaluate the stability of single crowns and 3-unit bridges in relation to the implant-abutment complex with and without tube in tube connection. Methods: 60 specimens with a total of 90 implants (diameter 3.8 mm) were fabricated and distributed into 4 groups: CST (Crown with short tube), CLT (crown with long tube), BNT (Bridge without tube) and BLT (bridge with long tube). All superstructures consisted of one-piece hybrid abutment restorations out of monolithic zirconia, bonded on prefabricated titanium bases and were directly screwed into the implants. Specimen underwent artificial aging (2.000.000 cycles, 120 N, 30 degrees off axis) and were subsequently loaded in an universal testing machine at an angle of 30 degrees until failure. The specimens were examined for damage during and after artificial aging. Results: During artificial aging, one test specimen of group CLT and two test specimens of group BNT failed. The average failure load was 498.8 (+/- 34.4) N for CLT, 418.8 (+/- 41.5) N for CST, 933.1 (+/- 26.2) N for BLT and 634.4 (+/- 29.0) N for BNT, with a statistical differences (p < 0.001) between the crown and bridge groups. All tested samples exhibited macroscopic deformations at the implant shoulder, which were more pronounced in the specimens without a tube in tube connection. Conclusions: Single crowns and 3-unit bridges with a long tube in tube connection showed significantly higher fatigue fracture strength compared to restorations with short or without tube in tube connection.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Medizin |
| Themengebiete: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit |
| ISSN: | 1883-1958 |
| Sprache: | Englisch |
| Dokumenten ID: | 98550 |
| Datum der Veröffentlichung auf Open Access LMU: | 05. Jun. 2023, 15:29 |
| Letzte Änderungen: | 17. Okt. 2023, 14:58 |
- Dokument bearbeiten
