2025年2月14日 · Reverse total shoulder arthroplasties (RTSA) or replacements (RTSR) are a variant of the standard total shoulder replacement (TSR). It is often the preferred method when there has been advanced damage to the rotator cuff, as it increases the range of motion by medialising the center of rotation and increasing the deltoid muscle's lever action.

For a reverse total shoulder replacement, use of the glenoid baseplate (metaglene) fixation is determined by the quality of the glenoid fossa and scapular neck bone.

Download scientific diagram | Elements of the glenoid component: metaglene (left) and glenosphere (right) from publication: Numerical study of the components positioning influence on the...

2012年11月23日 · On radiographs, the metaglene should be flush with the glenoid. If feasible, the inferior screw should be completely intraosseous. The anterior, superior, and posterior screws are usually bicortical.

The primary objective of this study was to determine whether there are differences in metaglene positioning related to the approach used (deltopectoral vs. anterosuperior) in primary reverse shoulder prosthesis (reverse shoulder arthroplasty) implantation.

2018年6月12日 · The metaglene is fixed to the glenoid by a central press-fit peg and locking and nonlocking screws angled to resist shear forces. In patients with poor glenoid bone stock, graft material can be used to reinforce the glenoid component [ 12 ].

Lateralization of the metaglene reduces scapular notching or impingement. However, the effect on joint mobility remains unclear. With increased attention to reverse shoulder arthroplasty over the past years, the aim of this biomechanical study is to ...