The subchondral bone layer and glenoid implant design are relevant for primary stability in glenoid arthroplasty
Background: Clinical studies suggest that reaming of the subchondral bone layer to achieve good implant seating is a risk factor for glenoid loosening. This study aims to evaluate (1) the importance of the subchondral bone layer and (2) the influence of the design of the glenoid component. - METHODS...
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| Hauptverfasser: | , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
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04 July 2018
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Archives of orthopaedic and trauma surgery
Year: 2018, Jahrgang: 138, Heft: 11, Pages: 1487-1494 |
| ISSN: | 1434-3916 |
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| Verfasserangaben: | Boris Sowa, Martin Bochenek, Steffen Braun, Jan Philippe Kretzer, Felix Zeifang, Thomas Bruckner, Gilles Walch & Patric Raiss |
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| 245 | 1 | 4 | |a The subchondral bone layer and glenoid implant design are relevant for primary stability in glenoid arthroplasty |c Boris Sowa, Martin Bochenek, Steffen Braun, Jan Philippe Kretzer, Felix Zeifang, Thomas Bruckner, Gilles Walch & Patric Raiss |
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| 520 | |a Background: Clinical studies suggest that reaming of the subchondral bone layer to achieve good implant seating is a risk factor for glenoid loosening. This study aims to evaluate (1) the importance of the subchondral bone layer and (2) the influence of the design of the glenoid component. - METHODS: Different techniques for preparation of an A1 glenoid were compared: (1) preserving the subchondral bone layer; (2) removal of the subchondral bone layer; (3) implantation of a glenoid component that does not adapt to the native anatomy. Artificial glenoid bones (n = 5 each) were used with a highly standardized preparation and implantation protocol. Biomechanical testing was performed during simulated physiological shoulder motion. Using a high-resolution optical system, the micromotions between implant and bone were measured up to 10,000 motion cycles. - RESULTS: At the 10,000 cycle measuring point, significantly more micromotions were found in the subchondral layer removed group than in the subchondral layer preserved group (p = 0.0427). The number of micromotions in the nonadapted group was significantly higher than in the subchondral layer preserved group (p = 0.0003) or the subchondral layer removed group (p = 0.0207). - CONCLUSION: Conservative reaming proved important to diminish the micromotions of the glenoid component. Implantation of a glenoid component that matches with the bony underlying glenoid can help to preserve the subchondral bone layer without sacrificing proper implant seating. | ||
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