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논문 기본 정보

자료유형
학술저널
저자정보
Monede-Hocquard, Lucie (University Bordeaux) Mesnard, Michel (University Bordeaux) Ramos, Antonio (Department of Mechanical Engineering, University of Aveiro) Gille, Olivier (Centre Hospitalier Universitaire, Service Orthopedie)
저널정보
테크노프레스 Biomaterials and biomedical engineering Biomaterials and biomedical engineering 제2권 제4호
발행연도
2015.1
수록면
237 - 248 (12page)

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"Dynamic stabilization" systems have been developed in recent years to treat degenerative disorders of the spinal column. In contrast to arthrodesis (fusion), the aim here is to conserve intervertebral mobility to maximize comfort. When developing innovative concepts, many mechanical tests need to be carried out in order to validate the different technological solutions. The present study focuses on the B Dyn$^{(R)}$ "dynamic stabilization" device (S14$^{(R)}$ Implants, Pessac, France), the aim being to optimize the choice of polymer material used for one of the implant's components. The device allows mobility but also limit the range of movement. The stiffness of the ring remains a key design factor, which has to be optimized. Phase one consisted of static tests on the implant, as a result of which a polyurethane (PU) was selected, material no.2 of the five elastomers tested. In phase two, dynamic tests were carried out. The fatigue resistance of the B Dyn$^{(R)}$ system was tested over five million cycles with the properties of the polymer elements being measured using dynamic mechanical analysis (DMA) after every million cycles. This analysis demonstrated changes in stiffness and in the damping factor which guided the choice of elastomer for the B Dyn$^{(R)}$ implant.

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