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J Shoulder Elbow Surg. 2018 Jan;27(1):59-64. doi: 10.1016/j.jse.2017.07.020. Epub 2017 Sep 29.

Standard versus bony increased-offset reverse shoulder arthroplasty: a retrospective comparative cohort study.

Author information

1
Division of Orthopaedics and Trauma Surgery, Centre Hospitalier Privé Saint-Grégoire (Vivalto Santé), Saint-Grégoire, France.
2
Sports Medicine Service, Beijing Jishuitan Hospital, Beijing, China.
3
Southern Oregon Orthopedics, Medford, OR, USA; Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA.
4
Division of Orthopaedics and Trauma Surgery, La Tour Hospital, Meyrin, Switzerland; Faculty of Medicine, University of Geneva, Geneva, Switzerland.
5
Division of Orthopaedics and Trauma Surgery, La Tour Hospital, Meyrin, Switzerland; Faculty of Medicine, University of Geneva, Geneva, Switzerland; Division of Orthopaedics and Trauma Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland. Electronic address: alexandre.laedermann@gmail.com.

Abstract

BACKGROUND:

To date, only a few comparative studies with small sample sizes have compared a traditional reverse shoulder arthroplasty (tRSA) to a bony increased-offset RSA (BIO-RSA). We hypothesized that the BIO-RSA would lead to lower notching rates and improved range of motion (ROM) compared with a tRSA.

METHODS:

A retrospective review was performed of 69 tRSAs and 61 BIO-RSAs performed by a single surgeon. At 2 years postoperative, ROM and Constant scores were compared. Radiographs were examined for scapular notching, scapular spurring or ossification, and graft healing.

RESULTS:

At the 2-year follow-up, the BIO-RSA group demonstrated improved anterior forward flexion compared with the tRSA group (145° ± 20° vs. 138° ± 20°, respectively; P = .017). There was no difference in external or internal rotation between the 2 groups. The BIO-RSA group had a higher Constant score than the tRSA group (69 ± 9 vs. 61 ± 13; P < .001). The radiographs showed no difference between the 2 groups, including scapular notching (P = .150).

CONCLUSION:

At the 2-year follow-up, BIO-RSA does not lead to a clinically significantly improvement in ROM, Constant scores, or change in scapular notching compared with a tRSA.

KEYWORDS:

BIO-RSA; Shoulder prosthesis; bony increased-offset; glenoid and humeral lateralization; postoperative function; range of motion (ROM); reverse shoulder arthroplasty

PMID:
28969891
DOI:
10.1016/j.jse.2017.07.020
[Indexed for MEDLINE]

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