*3.2. Radiological Results*

At the radiological evaluation, an RLL < 2 mm around the glenoid was observed in five (10%) cases and ≥ 2 mm in a single zone in one case, which appeared to be progressive. In three cases we observed an initial subsidence of the base plate due to incomplete glenoid preparation, which stabilized within the first year without any progressive change at the last follow-up (Figure 3).

**Figure 3.** Subsidence of the glenoid due to incomplete glenoid preparation (baseplate not completely in contact with subchondral bone) which stabilizes at last follow-up in high glenoid position with the development of grade 2 scapular notching. m, months; y, year.

An RLL < 2 mm around the humerus was observed in 10 (21%) cases and was confined only to position 4 in 7 of the 10 cases. The distribution of RLL is shown in Figure 4.

**Figure 4.** Image representing the frequency (number of cases) of RLL per zone of the humerus (**a**) and the glenoid (**b**).

GT was partially resorbed in 11 (23%) cases and totally in one (2%) case. Calcar was partially resorbed in 12 (25%) cases and totally in two (4%) cases. Cortical narrowing in zones 2 and 6 was present in 38 (79%) cases with 13 (27%) patients showing spot welds or condensation lines around the stem tip.
