The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
W Weber - One of the best experts on this subject based on the ideXlab platform.
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influence of contaminants in the stem Ball interface on the static fracture load of ceramic hip Joint Ball heads
Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine, 2008Co-Authors: Bernhard Weisse, Christian Affolter, A Stutz, Giovanni P Terrasi, S Kobel, W WeberAbstract:The probability of in-vivo failure of ceramic hip Joint implants is very low (0.05–0.004 per cent). Besides material flaws and overloading, improper handling during implantation may induce fractures of the ceramic Ball head in the long term. This study focuses on the influence of contaminants located in the stem—Ball interface and on the use of damaged metal tapers on the strength of ceramic Ball heads. Mechanical tests on alumina Ball heads according to the standard ISO 7206-10 were performed to identify their effect on the static fracture load. A decrease of up to 90 per cent with respect to the reference static fracture load was found when contaminants such as bone chips, soft tissue, or blood were present. Reductions of 57 per cent and 27 per cent were observed for deformed stem cross-sections (from circular to elliptical) and for flattened stems respectively, making deformed stems another influential parameter. Since any alteration of the interface between the metal taper and the ceramic Ball head yi...
Olivier Carli - One of the best experts on this subject based on the ideXlab platform.
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a disk prosthesis for vertebrae
2004Co-Authors: Olivier CarliAbstract:The invention relates to a disc prosthesis of the type comprising: - a first (2) and a second (3) plates intended to be fixed to adjacent vertebrae, - and a Joint Ball (4) interposed between the two plates (2, 3) mounted in a superposed position, so that the internal faces of these plates are facing each other, the Ball (4) being composed of a spherical cap cooperating with a cup spherique.Selon the invention, the first plate (2) said carrier has transversely a dimension (D) greater than the dimension (d) corresponding to the second plate (3), so as to constitute with its inside a stop for the second plate (3) and by its outer face (21) a range to the largest vertebra than that (31) by the second plate (3).
Bernhard Weisse - One of the best experts on this subject based on the ideXlab platform.
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influence of contaminants in the stem Ball interface on the static fracture load of ceramic hip Joint Ball heads
Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine, 2008Co-Authors: Bernhard Weisse, Christian Affolter, A Stutz, Giovanni P Terrasi, S Kobel, W WeberAbstract:The probability of in-vivo failure of ceramic hip Joint implants is very low (0.05–0.004 per cent). Besides material flaws and overloading, improper handling during implantation may induce fractures of the ceramic Ball head in the long term. This study focuses on the influence of contaminants located in the stem—Ball interface and on the use of damaged metal tapers on the strength of ceramic Ball heads. Mechanical tests on alumina Ball heads according to the standard ISO 7206-10 were performed to identify their effect on the static fracture load. A decrease of up to 90 per cent with respect to the reference static fracture load was found when contaminants such as bone chips, soft tissue, or blood were present. Reductions of 57 per cent and 27 per cent were observed for deformed stem cross-sections (from circular to elliptical) and for flattened stems respectively, making deformed stems another influential parameter. Since any alteration of the interface between the metal taper and the ceramic Ball head yi...
Christian Affolter - One of the best experts on this subject based on the ideXlab platform.
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influence of contaminants in the stem Ball interface on the static fracture load of ceramic hip Joint Ball heads
Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine, 2008Co-Authors: Bernhard Weisse, Christian Affolter, A Stutz, Giovanni P Terrasi, S Kobel, W WeberAbstract:The probability of in-vivo failure of ceramic hip Joint implants is very low (0.05–0.004 per cent). Besides material flaws and overloading, improper handling during implantation may induce fractures of the ceramic Ball head in the long term. This study focuses on the influence of contaminants located in the stem—Ball interface and on the use of damaged metal tapers on the strength of ceramic Ball heads. Mechanical tests on alumina Ball heads according to the standard ISO 7206-10 were performed to identify their effect on the static fracture load. A decrease of up to 90 per cent with respect to the reference static fracture load was found when contaminants such as bone chips, soft tissue, or blood were present. Reductions of 57 per cent and 27 per cent were observed for deformed stem cross-sections (from circular to elliptical) and for flattened stems respectively, making deformed stems another influential parameter. Since any alteration of the interface between the metal taper and the ceramic Ball head yi...
A Stutz - One of the best experts on this subject based on the ideXlab platform.
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influence of contaminants in the stem Ball interface on the static fracture load of ceramic hip Joint Ball heads
Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine, 2008Co-Authors: Bernhard Weisse, Christian Affolter, A Stutz, Giovanni P Terrasi, S Kobel, W WeberAbstract:The probability of in-vivo failure of ceramic hip Joint implants is very low (0.05–0.004 per cent). Besides material flaws and overloading, improper handling during implantation may induce fractures of the ceramic Ball head in the long term. This study focuses on the influence of contaminants located in the stem—Ball interface and on the use of damaged metal tapers on the strength of ceramic Ball heads. Mechanical tests on alumina Ball heads according to the standard ISO 7206-10 were performed to identify their effect on the static fracture load. A decrease of up to 90 per cent with respect to the reference static fracture load was found when contaminants such as bone chips, soft tissue, or blood were present. Reductions of 57 per cent and 27 per cent were observed for deformed stem cross-sections (from circular to elliptical) and for flattened stems respectively, making deformed stems another influential parameter. Since any alteration of the interface between the metal taper and the ceramic Ball head yi...
