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Posterior Shoulder Instability

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Shoulder Arthroscopy

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Abstract

Posterior shoulder instability has increasingly been identified as a cause of functional impairment and pain of the shoulder. The ABC classification gives a simple yet comprehensive classification of PSI with clear etiological differences and therapeutic relevance. It distinguishes acute first-time posterior subluxation (A1) or dislocation (A2) from recurrent dynamic posterior instability of functional (B1) or structural origin (B2), as well as from constitutional (C1) or acquired static posterior shoulder instability (C2). The ABC classification serves as an additional tool for clinicians to improve the understanding, diagnosis, and therapy when treating patients with posterior shoulder instability. In general, type A1, B1, and C1 instability should first be treated conservatively while in type A2, B2, and C2 surgery may be considered. The final treatment decision between conservative versus operative management of patients with PSI should be made on a case-by-case scenario based on the etiology and structural defects and of course while keeping in mind patient-specific factors (i.e., activity level).

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Authors and Affiliations

  1. Department of Shoulder and Elbow Surgery, Center for Musculoskeletal Surgery, Charité - Universitaetsmedizin Berlin, Berlin, Germany

    Philipp Moroder, Victor Danzinger & Doruk Akgün

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  1. Philipp Moroder
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  2. Victor Danzinger
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Editor information

Editors and Affiliations

  1. Department of Joint and Bone Surgery, University of Brescia, Brescia, Brescia, Italy

    Giuseppe Milano

  2. Department of Orthopaedics and Traumatology, Casa di Cura Villa Valeria, Rome, Roma, Italy

    Andrea Grasso

  3. Shoulder and Upper Limb Department, St. Luke's Hospital, Bielsko-Biała, Poland

    Roman Brzóska

  4. Department of Traumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia

    Ladislav Kovačič

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Moroder, P., Danzinger, V., Akgün, D. (2023). Posterior Shoulder Instability. In: Milano, G., Grasso, A., Brzóska, R., Kovačič, L. (eds) Shoulder Arthroscopy. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-66868-9_17

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  • DOI: https://doi.org/10.1007/978-3-662-66868-9_17

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