Specific Design of a Press Fit Humeral Stem Provides Low Stress Shielding in Reverse Shoulder Arthroplasty at Minimum 5 Years FU

Overview

Journal J Shoulder Elb Arthroplast

Publisher Sage Publications

Date 2022 Jul 14

PMID 35832511

Authors

Geoffroy Nourissat

Simon Corsia

Howard W Harris

Pierre-Alban Bouche

Affiliations

Soon will be listed here.

Abstract

Materials And Methods: We performed a retrospective monocentric study of patients continuously implanted with the Humeris® stem RSA for degenerative change of the shoulder. Nineteen shoulders, in eighteen patients (74.6 y.o (from 69 to 81)), were available at minimum five years follow-up.

Results: The mean final adjusted Constant score was 111.9 (65 to 130), and the mean ASES score was 49.82 (10 to 60). Humeral resorption was observed in 21% of cases. We found a statistically significant ( = .014) lower adjusted Constant score in patients presenting with resorption on post-operative X-rays compared to those without resorption (115.6 vs. 98.25). Half cases of patients presenting a resorption underwent L'Episcopo procedure during surgery. Humeral resorption occurs the first year after surgery and do not increase even 8 years after surgery. Analysis demonstrated no correlation between the value of filling ratios and bone resorption.

Conclusion: The current study confirms a low rate of stress shielding around the studied stem, with rare bony resorption and no osteopenia around the humeral stem. This study highlights the importance of choosing the appropriate proximal shape and length of the humeral stem for press fit fixation in RSA.

Citing Articles

Stress shielding in stemmed reverse shoulder arthroplasty: an updated review.

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Association between the canal filling ratio and bone resorption in trabecular metal stems in reverse total shoulder arthroplasty: a radiographic analysis using tomosynthesis.

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Radiographic Evaluation and Changes in Bone Density of the Humeral Side after Reverse Total Shoulder Arthroplasty.

Soma D, Ichiseki T, Ueda S, Sakurai M, Kawahara N J Clin Med. 2023; 12(24).

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