Table II.
Glenoid components and their effect on IR.
| Changes to glenoid component | Change to IR | Study, yr | Study type |
|---|---|---|---|
| Lateralization | Improves IR | Berhouet (2013)5 | Cadaver |
| Keener (2018)24 | Retrospective | ||
| Krämer (2016)27 | Cadaver | ||
| Lädermann (2020)28 | 3D model | ||
| Li (2013)30 | 3D model | ||
| Terrier (2013)44 | 3D model | ||
| Werner (2018)50 | 3D model | ||
| BIO-RSA not better than tRSA | Athwal (2015)2 | Prospective | |
| Collin (2018)14 | Retrospective | ||
| Greiner (2015)18 | Prospective | ||
| NS effect | Langhor (2015)29 | Cadaver | |
| Merolla (2019)33 | Retrospective | ||
| Rojas (2019)38 | Retrospective | ||
| Diameter | 42 mm increases IR | Berhouet (2013)5 | Cadaver |
| Virani (2013)46 | 3D model | ||
| No difference | Müller (2018)34 | Retrospective | |
| Inverse relationship | Langhor (2015) | Cadaver | |
| Terrier (2013)44 | 3D model | ||
| Overhang | Improved | Rol (2019)39 | Prospective |
| Retroversion | Greater retroversion greater IR | Keener (2018)24 | Retrospective |
| Tilt | Inferior tilt, improved IR | Li (2013)30 | 3D model |
| Decreased IR | Werner (2018)50 | 3D model | |
| Baseplate | NS between 25-29mm | Chae (2014)10 | Biomechanical |
| Insert thickness | Reduces when over 6mm | Tashjian (2015)43 | Biomechanical |
| Increases releative to IR | Henninger (2012)20 | Biomechanical | |
| No difference with high or low constraints | Abdulla (2017)1 | Cadaver |
IR, internal rotation; 3D, 3-dimensional; RSA, reverse shoulder arthroplasty; tRSA, traditional reverse shoulder arthroplasty.