Pilot study of the cyclic fatigue characteristics of five endodontic posts with four core materials
| Autor: | Deutsch As, Brett I. Cohen, Ira Newman, Musikant Bl, Mark K. Pagnillo |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Periodicity
Core (anatomy) Cyclic stress business.industry Dentistry Pilot Projects In Vitro Techniques engineering.material Post and core Bite Force Equipment Failure Analysis Incisor Amalgam (dentistry) Equipment failure engineering Humans Bicuspid Equipment Failure business General Dentistry Miracle Mix Post and Core Technique Mathematics |
| Zdroj: | Journal of Oral Rehabilitation. 27:83-92 |
| ISSN: | 1365-2842 0305-182X |
| DOI: | 10.1046/j.1365-2842.2000.00470.x |
| Popis: | This pilot study concerned the cyclic fatigue of five different endodontic post systems (AccessPost(R), Flexi-Flange(R), Flexi-Post(R), ParaPost(R), and Vlock(R)) with four different core materials (Tytin(R) Silver amalgam, Ti-Core(R), Ketac-Silver(R) and G-C Miracle Mix(R)). In vitro cyclic fatigue was performed using a fatigue machine that simulates masticatory fatigue forces. An instantaneous force of 5 lb was applied to each post and core combination for a test configuration of 4 000 000 repetitions or until failure occurred. The type of failure and number of repetitions at failure was recorded for each sample tested. Two-way ANOVA was used to compare groups. All posts/core samples with Ti-Core and Tytin Silver amalgam completed the test configuration of 4 000 000 cycles without failures. All posts/core samples with Ketac-Silver failed before the 4 000 000 test cycle configuration, all as a result of core failures. All posts/core samples with G-C Miracle Mix failed in a similar way. The Newman-Keuls multiple comparison test illustrated that Ti-Core and Tytin Silver amalgam were similar to each other and were superior to both G-C Miracle Mix and Ketac-Silver. Similar fatigue test results are found in the literature. |
| Databáze: | OpenAIRE |
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