Effect of Repeated Sterilization by Different Methods on Strength of Carbon Fiber Rods Used in External Fixator Systems
| Autor: | Omer Kays Unal, Hasan Mutlu, Ulku Sur Unal, Afşar Timuçin Özkut, Oguz Poyanli, Irfan Esenkaya |
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| Rok vydání: | 2018 |
| Předmět: |
External Fixators
Biocompatible Materials Surface finish Rod 03 medical and health sciences 0302 clinical medicine Flexural strength Carbon Fiber Deflection (engineering) Materials Testing Surface roughness Humans Medicine Orthopedics and Sports Medicine Composite material Retrospective Studies 030222 orthopedics business.industry Reproducibility of Results Sterilization Flexural rigidity Prostheses and Implants 030206 dentistry General Medicine Sterilization (microbiology) Bending moment Surgery Stress Mechanical business |
| Zdroj: | Journal of Orthopaedic Trauma. 32:425-430 |
| ISSN: | 0890-5339 |
| DOI: | 10.1097/bot.0000000000001224 |
| Popis: | OBJECTIVES We aimed to study the effects of repeated sterilization, using different methods, on the carbon fiber rods of external fixator systems. METHODS We used a randomized set of 44 unused, unsterilized, and identical carbon fiber rods (11 × 200 mm), randomly assigned to 2 groups: unsterilized (4 rods) and sterilized (40 rods). The sterilized rods were divided into 2 groups, those sterilized in an autoclave and those sterilized using hydrogen peroxide. These were further divided into 5 subgroups based on the number of sterilization repetition to which the fibers were subjected (25, 50, 75, 100, and 200). A bending test was conducted to measure the maximum bending force, maximum deflection, flexural strength, maximum bending moment and bending rigidity. We also measured the surface roughness of the rods. RESULTS An increase in the number of sterilization repetition led to a decrease in maximum bending force, maximum bending moment, flexural strength, and bending rigidity, but increased maximum deflection and surface roughness (P < 0.01). The effect of the number of sterilization repetition was more prominent in the hydrogen peroxide group. CONCLUSIONS This study revealed that the sterilization method and number of sterilization repetition influence the strength of the carbon fiber rods. Increasing the number of sterilization repetition degrades the strength and roughness of the rods. |
| Databáze: | OpenAIRE |
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