**3. Results**

Forty-seven patients participated in a matched analysis (23 in OG and 24 in IG). Cohorts were comparable in terms of age, gender, surgical indication, preoperative ROM, and Constant score (Table 2).


**Table 2.** Comparison Analysis of Pre- and Postoperative Data between Onlay and Inlay Groups.

\* Between pre- and post-operative measurements. Underlined *p*-values indicate those below 0.05. ◦—degrees.

> The postoperative results are summarized in Table 2. Patients in the IG had a significantly greater follow-up compared to the OG (52.0 ± 14.6 vs. 27.3 ± 2.9 months; *p* < 0.001). Anterior forward flexion improved significantly in both groups but was significantly greater postoperatively in the IG compared to the OG (140.4 ± 33.1 vs. 128.9 ± 26.8; *p* = 0.032). External rotation improved significantly only in the OG (preop: 4.6◦ ± 8.9◦ vs. postop: 12.0◦ ± 15.8◦; *p* = 0.049) and was also significantly greater postoperatively in the OG compared to the IG (12.0 ± 15.8 vs. 1.9 ± 3.8; *p* = 0.028). In the OG, external rotation improved in 9 cases (10◦ to 40◦), remained comparable in 11 cases, and worsened in 3 cases (5◦ to 30◦). In the IG, external rotation improved in 5 cases (5◦ to 10◦), remained comparable in 17 cases, and worsened in 2 cases (10◦). Postoperative internal rotation did not increase in any members of the two groups and was not significantly different between the groups. The Constant score improved significantly in both groups.
