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Published in: Archives of Orthopaedic and Trauma Surgery 11/2018

01-11-2018 | Orthopaedic Surgery

The subchondral bone layer and glenoid implant design are relevant for primary stability in glenoid arthroplasty

Authors: Boris Sowa, Martin Bochenek, Steffen Braun, Jan Philippe Kretzer, Felix Zeifang, Thomas Bruckner, Gilles Walch, Patric Raiss

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 11/2018

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Abstract

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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Metadata
Title
The subchondral bone layer and glenoid implant design are relevant for primary stability in glenoid arthroplasty
Authors
Boris Sowa
Martin Bochenek
Steffen Braun
Jan Philippe Kretzer
Felix Zeifang
Thomas Bruckner
Gilles Walch
Patric Raiss
Publication date
01-11-2018
Publisher
Springer Berlin Heidelberg
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 11/2018
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-018-2990-1

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