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Loosening of simulated THR using PMMA cement and bioactive cement
In our previous study, it was demonstrated that a newly developed bioactive bone cement, hydroxyapatite composite resin (CAP), had the ability to make a direct contact with bone having a superior mechanical proprieties in contrast with PMMA cement. The objective of this study is to evaluate the loosening mechanism of the femoral stem on using CAP cement and PMMA cement as a component of THR (total hip replacement). The simulated THR model was prepared by using Sawbone, which is made of epoxy resin composite. After cyclic loading of 1.9 KN on head of prosthesis, the strain condition of femur was measured by using a resistance strain gauge. The strain in the middle position of femur in lateral side and medial side decreases with increasing cycle numbers, especially when PMMA cement was used as a components of THR. Extensive debonding area at the stem-cement interface was observed in THR when PMMA cement was used. Whereas in CAP cement, the debonding area at the interface was less conspicuous. From these results in vitro, we can conclude that CAP cement has much higher possibility to prevent the loosening than PMMA cement.
Loosening of simulated THR using PMMA cement and bioactive cement
In our previous study, it was demonstrated that a newly developed bioactive bone cement, hydroxyapatite composite resin (CAP), had the ability to make a direct contact with bone having a superior mechanical proprieties in contrast with PMMA cement. The objective of this study is to evaluate the loosening mechanism of the femoral stem on using CAP cement and PMMA cement as a component of THR (total hip replacement). The simulated THR model was prepared by using Sawbone, which is made of epoxy resin composite. After cyclic loading of 1.9 KN on head of prosthesis, the strain condition of femur was measured by using a resistance strain gauge. The strain in the middle position of femur in lateral side and medial side decreases with increasing cycle numbers, especially when PMMA cement was used as a components of THR. Extensive debonding area at the stem-cement interface was observed in THR when PMMA cement was used. Whereas in CAP cement, the debonding area at the interface was less conspicuous. From these results in vitro, we can conclude that CAP cement has much higher possibility to prevent the loosening than PMMA cement.
Loosening of simulated THR using PMMA cement and bioactive cement
Prothesenlockerung einer simulierten Hüftprothese unter Verwendung von PMMA-Zement und bioaktivem Zement
Ikeda, D. (author) / Saito, M. (author) / Kanou, K. (author) / Yamano, M. (author) / Murakami, A. (author) / Kawagoe, K. (author) / Shibuya, T. (author) / Nakashima, T. (author)
1999
4 Seiten, 3 Bilder, 7 Quellen
Conference paper
English
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