| In vitro biomechanical analysis of glenoïds before and after implantation of prosthetic components |
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| 作者姓名： | Maurel N Diop A Grimberg J Elise S |
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| 摘 要： |
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In vitro biomechanical analysis of glenoı̈ds before and after implantation of prosthetic components |
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| Maurel N,Diop A,Grimberg J,Elise S.In vitro biomechanical analysis of glenoı̈ds before and after implantation of prosthetic components[J].Journal of biomechanics,2002,35(8):1071-1080. |
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| Authors: | Maurel N Diop A Grimberg J Elise S |
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| Institution: | 1. Ecole Nationale Supérieure d’Arts et Métiers, 151 Boulevard de l’Hôpital, 75013 Paris, France;2. Service de Chirurgie Orthopédique et traumatologique. CHI Meulan-Les Mureaux, 1 rue du Fort, 78250 Meulan, France;3. Service d’Orthopédie A, Hôpital Roger Salengro, 59037 Lille Cedex, France;1. Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA;2. Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, and Ludwig Center at Harvard, Boston, MA 02215, USA;1. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;2. Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China;3. College of Resources and Environment, Hunan Agricultural University, Changsha 410028, China;1. Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;2. Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;3. Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania |
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| Abstract: | Biomechanical investigations are yet necessary to better understand the origin of the glenoı̈d loosening which is the main reason for revision surgery. The aim of this study was to analyse the behaviour of cadaveric glenoı̈ds before and after implantation of glenoı̈d prostheses. For that, we developed a new experimental protocol allowing measurement of bone strains and implants displacements under various loading cases.Ten pairs of fresh cadaveric scapulae were tested. Two kinds of loads were applied on the intact glenoı̈d: physiological loads corresponding to a 0–180° abduction and anteflexion movements, and 500 N loads. The glenoı̈ds were then implanted with a keeled or pegged cemented polyethylene implant. The same previous 500 N loads were then applied on the implanted glenoı̈ds. Strains were measured using six strain gages placed on precise points around the peripheral cortex of the glenoı̈d. Displacements of implants under loading were measured using two CCD cameras.Maximum strains were obtained between 60° and 120° of abduction or anteflexion. They were located at the anterior and antero-superior parts of the glenoı̈d during abduction and at the posterior and postero-superior parts during anteflexion. Implantation of a prosthetic component generally seemed to increase strains, but tensile strains were decreased at the postero-inferior part with the antero-inferior loading point.Some differences were observed between the implants, but they have to be confirmed by further experiments.The great number of data obtained for intact scapulae could be used for a better understanding of glenoı̈d behaviour and for validation of finite element models. |
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