Table 5.

General recommendations of implant-related variables to be reported in future studies.

Biomechanical parameter to be reported	Reasoning behind its relevance
1. Glenoid component baseplate diameter and tilt	There are multiple reverse shoulder systems in which the glenoid baseplate size determines the available glenosphere options. Furthermore, the tilt of the glenoid baseplate is relevant because it influences the center of rotation location, peg length, as well as the bone purchase of the baseplate screws (Fig. 5).
2. Glenosphere diameter and type	Several reverse shoulder systems available provide standard, inferior-offset, and lateralized glenospheres.
3. Glenoid baseplate fixation mechanism	Especially when radiolucency and revision rate are of interest, it is preferable that authors report central peg diameter and length together with the type of associated baseplate screws (locking, non-locking, angular-locking, compression-angular-locking, etc.).
4. Purpose of glenoid bone grafting	As underlined in Fig. 3, glenoid bone grafting can be utilized in multiple situations and for different reasons. Therefore, in order to better understand the outcomes of surgery, readers should be informed on the purpose of glenoid bone grafting.
5. Type of humeral component	Long, straight stems have a tendency to decrease the deltoid lever arm more so than short stems or stemless stems. In turn, a decreased deltoid lever arm influences the stability of the implant, which would determine the surgeon to utilize a more constrained or thicker humeral bearing.
6. Humeral bearing surface thickness and offset	Reverse shoulder systems can provide the option to adjust the offset of the humeral bearing surface. This, in turn will provide the surgeon with the option to optimize soft tissue tensioning and the resulting range of motion.