Summary
This prospective multicentric radiographic analysis examined 146 cemented glenoid components implanted in 109 cases of osteoarthritis (OA) and 37 cases of rheumatoid arthritis (RA) with an average follow-up of 20 months (12–48). The glenoid component was all polyethylene, pear shaped, available in three sizes, with a flat back and fixed by means of a cemented keel. The radiolucent line score (RLL score) was used to quantify the lucent lines and evaluate their progression. A radiographic loosening of the glenoid component (complete lucent line of more than 2 mm and/or RLL score >12) was present in 9% of cases (19% in RA and 6% in OA). Neither continuous lucent lines (51%) nor loosening (9%) was correlated with the functional result, but both were correlated with upward migration of the humeral head. By contrast, progressing lucent lines, present in 31% of cases, were correlated with a worsening of the functional result. The glenoid component tended to be positioned too low (21%), with a superior tilt (12%), with an inferior tilt (17%) and or with excessive retroversion. This study emphasizes the technical difficulties of implantation of a glenoid component (exposure, preparation of the bone, cementing) and the limitations of cemented polyethylene component.
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© 1999 Springer-Verlag Berlin Heidelberg
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Molé, D., Roche, O., Riand, N., Lévigne, C., Walch, G. (1999). Cemented Glenoid Component: Results in Osteoarthritis and Rheumatoid Arthritis. In: Walch, G., Boileau, P. (eds) Shoulder Arthroplasty. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58365-0_16
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DOI: https://doi.org/10.1007/978-3-642-58365-0_16
Publisher Name: Springer, Berlin, Heidelberg
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