The aim of this study was to have updated scrutiny of the influence of the humeral neck-shaft angle (HNSA) in patients who underwent reverse shoulder arthroplasty (RSA). A PRISMA-guided literature search was conducted from May to September 2021. Clinical outcome scores, functional parameters, and any complications were reviewed. Eleven papers were identified for inclusion in this systematic review. A total of 971 shoulders were evaluated at a minimum-follow up of 12 months, and a maximum of 120 months. The sample size for the “HNSA 155◦ ” group is 449 patients, the “HNSA 145◦ ” group involves 140 patients, and the “HSNA 135◦ ” group comprises 291 patients. The HNSA represents an important variable in choosing the RSA implant design for patients with rotator cuff arthropathy. Positive outcomes are described for all the 155◦, 145◦, and 135◦ HSNA groups. Among the different implant designs, the 155◦ group show a better SST score, but also the highest rate of revisions and scapular notching; the 145◦ cohort achieve the best values in terms of active forward flexion, abduction, ASES score, and CMS, but also the highest rate of infections; while the 135◦ design obtains the best results in the external rotation with arm at side, but also the highest rate of fractures. High-quality studies are required to obtain valid results regarding the best prosthesis implant.

The Role of Humeral Neck-Shaft Angle in Reverse Total Shoulder Arthroplasty: 155◦ versus <155◦ — A Systematic Review

Longo U. G.;Denaro V.
2022-01-01

Abstract

The aim of this study was to have updated scrutiny of the influence of the humeral neck-shaft angle (HNSA) in patients who underwent reverse shoulder arthroplasty (RSA). A PRISMA-guided literature search was conducted from May to September 2021. Clinical outcome scores, functional parameters, and any complications were reviewed. Eleven papers were identified for inclusion in this systematic review. A total of 971 shoulders were evaluated at a minimum-follow up of 12 months, and a maximum of 120 months. The sample size for the “HNSA 155◦ ” group is 449 patients, the “HNSA 145◦ ” group involves 140 patients, and the “HSNA 135◦ ” group comprises 291 patients. The HNSA represents an important variable in choosing the RSA implant design for patients with rotator cuff arthropathy. Positive outcomes are described for all the 155◦, 145◦, and 135◦ HSNA groups. Among the different implant designs, the 155◦ group show a better SST score, but also the highest rate of revisions and scapular notching; the 145◦ cohort achieve the best values in terms of active forward flexion, abduction, ASES score, and CMS, but also the highest rate of infections; while the 135◦ design obtains the best results in the external rotation with arm at side, but also the highest rate of fractures. High-quality studies are required to obtain valid results regarding the best prosthesis implant.
2022
center of rotation; humeral lateralization; humeral neck-shaft angle; outcomes; range of motion; reverse shoulder arthroplasty; scapular notching
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12610/70089
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