Table 2 Outcome parameters
Parameters | Allografts group (n = 47) | No allografts group (n = 75) | P value |
|---|---|---|---|
Area of stress shielding | 0.599 | ||
 Small | 28 (59.5%) | 41 (54.7%) |  |
 Moderate | 13 (27.7%) | 23 (30.7%) |  |
 Large | 6 (12.8%) | 11 (14.7%) |  |
Severity of stress shielding | 0.01 | ||
 Mild | 40 (85.1%) | 48 (64.0%) |  |
 Moderate | 5 (10.6%) | 16 (21.3%) |  |
 Severe | 2 (4.3%) | 11 (14.7%) |  |
Distal cortical hypertrophy | 14 (29.8%) | 29 (38.7%) | 0.318 |
Bone restoration in the defect area | < 0.001 | ||
 Osseous restoration | 30 (63.8%) | 23 (30.7%) |  |
 Constant defects | 12 (25.5%) | 30 (40.0%) |  |
 Increasing defects | 5 (10.6%) | 22 (29.3%) |  |
Femoral width (mm)* | |||
 Pre-operation | 31.7 ± 4.4 (22.6–38.0) | 32.2 ± 5.1 (23.9–39.4) | 0.457 |
 Immediate post-operation | 42.1 ± 6.5 (29.9–55.6) | 32.3 ± 5.0 (23.8–39.4) | < 0.001 |
 Latest follow-up | 38.6 ± 7.2 (25.3–57.7) | 31.2 ± 6.5 (22.3–42.5) | < 0.001 |
Fixation and stability of the stems | 0.672 | ||
 Stable bone ingrowth | 40 (85.1%) | 59 (78.7%) |  |
 Stable fibrous ingrowth | 6 (12.8%) | 14 (18.7%) |  |
 Unstable | 1 (2.1%) | 2 (2.7%) |  |
Re-revision | 2 (4.3%) | 3 (4.0%) | 0.945 |
 PJI | 0 (0%) | 1 (1.3%) |  |
 AL | 1 (2.1%) | 2 (2.7%) |  |
 PFF | 1 (2.1%) | 0 (0%) |  |
HHS | |||
 Preoperative points | 41.2 ± 10.7 | 43.7 ± 9.9 | 0.281 |
 Postoperative points | 84.6 ± 6.0 | 84.8 ± 6.6 | 0.495 |
Complications | 4 (8.5%) | 5 (6.7%) | 0.705 |
 Intraoperative fracture | 2 (4.3%) | 3 (4.0%) |  |
 Wound infection | 1 (2.1%) | 0 (0%) |  |
 Postoperative dislocation | 1 (2.1%) | 2 (2.7%) |  |