This retrospective study tracked how glenoid bone loss and humeral head subluxation progress in primary glenohumeral osteoarthritis. Using serial radiographs over a mean of 8.9 years in 48 shoulders, it asked whether arthritis follows predictable Walch 'tracks' or evolves more fluidly. The goal was to give real numbers for counseling patients when arthroplasty is delayed.
When you counsel a patient with symptomatic shoulder OA who is not yet ready for replacement, the Walch pattern tells you what to expect if you wait. A posteriorly subluxed B glenoid will stay posteriorly subluxed. Delay does not recenter the head, and over half of B2 glenoids progress to B3, which pushes you toward more complex glenoid reconstruction or reverse arthroplasty.
A concentric A glenoid is safer to observe but not risk-free: about 20% develop eccentric wear, and A1 does so more often than A2. So a young A1 shoulder can still convert to a posterior-wear problem over a decade.
Use these numbers directly in shared decision-making. The data are radiographic snapshots without clinical outcomes, so they inform prognosis of bone loss, not the timing of surgery itself.
This retrospective study tracked how glenoid bone loss and humeral head subluxation progress in primary glenohumeral osteoarthritis. Using serial radiographs over a mean of 8.9 years in 48 shoulders, it asked whether arthritis follows predictable Walch 'tracks' or evolves more fluidly. The goal was to give real numbers for counseling patients when arthroplasty is delayed.
When you counsel a patient with symptomatic shoulder OA who is not yet ready for replacement, the Walch pattern tells you what to expect if you wait. A posteriorly subluxed B glenoid will stay posteriorly subluxed. Delay does not recenter the head, and over half of B2 glenoids progress to B3, which pushes you toward more complex glenoid reconstruction or reverse arthroplasty.
A concentric A glenoid is safer to observe but not risk-free: about 20% develop eccentric wear, and A1 does so more often than A2. So a young A1 shoulder can still convert to a posterior-wear problem over a decade.
Use these numbers directly in shared decision-making. The data are radiographic snapshots without clinical outcomes, so they inform prognosis of bone loss, not the timing of surgery itself.