| Autor: |
Ribeiro, Kevin Mauricio Menon, da Rosa, Edison, Santos, Arthur Paiva Grimaldi, Roesler, Carlos Rodrigo de Mello |
| Zdroj: |
Journal of Testing & Evaluation; May2022, Vol. 50 Issue 3, p1-12, 12p |
| Abstrakt: |
Objective: The aim of this study was to develop and evaluate a new benchtop test method to measure the potential migration of intervertebral body fusion devices (IBFDs) of different designs. Methods: A new benchtop test method was proposed to evaluate the migration resistance of intervertebral cages under cyclic loads, which is based on movements and flexion-extension loads experienced by the lumbar spine. The IBFD migration behavior under four test setups was investigated by controlled replicates of the test combining two loading configurations and two foam block densities for the bone substitute material. Additionally, the use of two distinct displacement measurement systems, one optical (OptiTrack) and another involving contact (linear variable differential transformer [LVDT]), was evaluated to measure the posterior-anterior movement of the IBFD during testing. Results: The results obtained by applying the new benchtop method indicate that the different test setups can influence the direction and magnitude of the resulting migration of the intervertebral cages, while the two measurement systems provided similar results. Conclusions: The proposed benchtop methodology is able to perform evaluation of IBFD. The use of foam block grade 15 and a test setup with eccentric anterior positioning results in migrations measurable using LVDT or OptiTrack, allowing comparisons between different IBFD designs. The method could be improved to more accurately mimic the movements that cause the migration of IBFD. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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