*3.1. Radiologic Assessment*

Radiolucency on the humeral side was only minor and did not differ between the groups. It was detected in three cases for the rTSR group and in four cases for the aTSR group at the 2-year mark (Table 5). The glenoid component demonstrated more surrounding radiolucency/notching signs for the rTSR (*n* = 10) than the aTSR group (*n* = 6) after 2 years. There was no significant component loosening in either group, and no dislocations, hence no revision surgery was required in either group.

**Table 4.** Overview and comparison of 2-year follow-up outcomes (radiological and clinical outcomes, patient satisfaction and complication rates). The "+" (plus sign) represents higher values in comparison with the other category, whereas "=" (equal sign) represtents no significant differences. (External rotation (ER), active elevation (AE), stabilized scapular glenohumeral abduction (GH)).


**Table 5.** Postoperative radiologic assessment for the glenoid and humeral components for the anatomic and reverse TSR. Radiolucency for the glenoid component of aTSR is scored according to Lazarus [18], whereas for the rTSR, glenoid notching is scored according to Sirveaux [20].

