The risk of suprascapular and axillary nerve injury in reverse total shoulder arthroplasty: An anatomic study

Implantation of rTSA components endangers the axillary nerve because of its proximity to the humeral metaphysis and the inferior glenoid rim. Posterior and superior drilling and extraosseous screw placement during glenoid baseplate implantation in rTSA place the suprascapular nerve at risk, with safe zones to the nerve passing the spinoglenoid notch of 11 mm and to the suprascapular notch of 19 mm.