Table 1 Patients’ demographic and surgical data (n = 32 patients, 37 hips and 6 patients, 7 hips in each group)
J-Taper group | Synergy group | ||||
|---|---|---|---|---|---|
Median n (%) | Range | Median n (%) | Range | p value | |
Age (y) | 56 | (37–74) | 55 | (43–81) | 0.85 |
Body weight (kg) | 58 | (41–88) | 62 | (54–101) | 0.17 |
BMI (kg/m2) | 24 | (18–37) | 25 | (22–33) | 0.56 |
Male (hips) | 6 (16%) | 2 (29%) | |||
Indication (hips) | |||||
Osteoarthritis due to DDH (Crowe grades I) | 24 (65%) | 2 (29%) | |||
Osteonecrosis | 7 (19%) | 3 (43%) | |||
Primary osteoarthritis | 4 (11%) | 2 (29%) | |||
Osteoarthritis due to trauma | 1 (3%) | ||||
Osteoarthritis due to osteochondritis dissecans | 1 (3%) | ||||
Follow-up period (y) | 8 | (7–9) | 9 | (9–9) | < 0.0001 |
Stem type (hips) | |||||
Standard | 3 (8%) | ||||
High offset | 34 (92%) | 7 (100%) | |||
Head diameter (hips) | |||||
28 mm | 5 (14%) | 7 (100%) | |||
32 mm | 32 (86%) | ||||
Head offset (hips) | |||||
− 5 mm | 1 (14%) | ||||
+ 0 mm | 17 (46%) | 6 (86%) | |||
+ 3 mm | 17 (46%) | ||||
+ 6 mm | 3 (8%) | ||||
Unilateral THA (patients) | 20 (63%) | 4 (67%) | |||
Bilateral THA (patients) | 5 (16%) | 1 (17%) | |||
THA with other implants (patients) | 7 (22%) | 1 (17%) | |||
Flexural rigidity (Nm2) | 45 | 82 | |||