title: Current concepts in the surgical management of primary glenohumeral arthritis with a biconcave glenoid.
abstract: Glenoid morphology has an important impact on outcomes and complication rates after shoulder arthroplasty for primary glenohumeral arthritis. The B2 glenoid, or a biconcave glenoid with posterior humeral head subluxation, in particular has been associated with a poorer outcome with shoulder arthroplasty compared with other glenoid types. A variety of techniques may be used to address the bone deficiency and instability seen with this glenoid type. Studies suggest that total shoulder arthroplasty may have a reasonable result in the short term but be associated with a high complication rate in the mid term because of recurrence of instability and early glenoid loosening when neoglenoid retroversion is greater than 27° or posterior humeral head subluxation is greater than 80%. Particularly in older patients with a substantial B2 deformity, primary reverse shoulder arthroplasty may be a more predictable means of addressing bone deficiency and restoring stability.
authors.affiliation: Southern Oregon Orthopedics, Medford, and Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA. Electronic address: pjdenard@gmail.com.
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Denard
authors.forename: Gilles
authors.initials: G
authors.lastname: Walch
mesh_terms: D001168:Arthritis / Q000601:surgery*; D019643:Arthroplasty, Replacement / Q000379:methods*; D006801:Humans; D012540:Scapula / Q000033:anatomy & histology* / Q000601:surgery; D012783:Shoulder Dislocation / Q000601:surgery*; D012785:Shoulder Joint / Q000601:surgery*
keywords: B2 glenoid; Glenohumeral arthritis; Review Article; biconcave glenoid; glenoid erosion; posterior subluxation