Shoulder Classification Systems

Rotator Cuff Arthropathy

  • Seebauer
    • Type IA – centered, stable
    • Type IB – centered medialized
    • Type IIA – decentered, limited stability, superior translation
    • Type IIB – decentered, unstable, anterosuperior escape
  • Hamada
    • Grade 1 – ACI >/= 6 mm
    • Grade 2 – ACI </= 5mm
    • Grade 3 – Grade 2 + acetabularization of acromion
    • Grade 4A – GH OA, no acetabularization, AHI < 7mm
    • Grade 4B – GH OA, acetabularization, AHI </=5mm
    • Grade 5 – humeral head collapse

Primary Glenohumeral Arthritis

  • Modified Walch
    • A1 – centered humeral head, minor central glenoid “erosion”
    • A2 – centeted humeral head, major central glenoid “erosion”
    • B1 – posterior humeral head subluxation, no glenoid “erosion”
    • B2 – posterior humeral head subluxation, post glenoid “erosion”
    • B3 – monoconcave glenoid “posteriorly worn”, at least 15 degree retroversion
    • C – dysplastic glenoid with at least 25% retroversion
    • D – glenoid anteversion or anterior humeral head subluxation