Some surgeons use an augmented glenoid to treat retroversion and posterior bone loss.
Concentric reaming is required to insert it in the anterior glenoid
Then, you will need to remove any posterior bone that isn’t necessary for the fit of the chosen component. This can be done using an oscillating rasp or a sandpaper.
or a superior/inferior scraper
The size of a posterior augment can range from 3 to 7 millimeters. Below is the amount of bone that was removed from a 7 mm case.
The authors of Functional Improvement after Posteriorly Augmented Total Sheath Arthroplasty: Factors Associated With Functional Improvement sought to determine pre-operative and postoperative factors that affect range of motion and function in patients with B2 and B3 glenoid morphologies.
One highly skilled shoulder surgeon performed 1,044 consecutive TSAs. 88% of these TSAs were performed using a non-augmented glenoid. Twelve percent of these were done with posteriorly augmented, step glenoid components. The indications for using an augmented component weren’t specified.
This analysis included 50 patients (57%) (41/9 B2 and 9/3/glenoids) who had at least two years of follow-up. Two patients with posterior dislocation were excluded.