Table 1 Patient demographics
Demographics | Data |
|---|---|
Gender | 22 females(25 hips), 3 males(3 hips) |
Mean age | 72.5 ± 5.3 years (range 60.3 to 82.6 years) |
Height | 162.4 ± 3.2 cm (range 155.8 to 174.3 cm) |
Weight | 65.3 ± 6.7 kg (range 58.5 to 81.1 kg) |
BMI | 27.3 ± 2.8 (range 21.8 to 33.8) |
Disease classification | Osteoarthritis in 5 patients(5 hips), rheumatoid arthritis in 13 patients(15 hips), ankylosing spondylitis in 5 patient (5 hips) |
Dorr index | 0.75 ± 0.31 (range 0.68 to 0.95) |
Femoral canal dimension | 18.5 ± 2.9 mm (range 16.2 to 22.7 mm) |
Cortical index | 0.37 ± 0.23 (range 0.21 to 0.48) |
Follow-up time | 72 ± 8.5 months (range 57 to 85 months) |
Preoperative Harris score | 46 ± 9 (range 39 to 62) |
12 months after surgery of Harris score | 90 ± 9 (range 83 to 98) |
Last follow-up of Harris score | 90 ± 9 (range 83 to 98) |
Stem position | Neutral alignment (19), varus position (5), valgus position (1) |
Proximal stem-to-canal fill percentage | 95% ± 3.5% (anteroposterior view), 90% ± 2.8% (lateral view) |
Distal canal fill percentage | 93% ± 4.5% (anteroposterior), 92% ± 3. 9% (lateral) |
Bone resorption and stress shielding | 5 hips (grade 1 in 3 hips, grade 2 in 2 hips) |
Bone-prosthetic landmarks | 2 stem (2 mm), 1 stem (3 mm) |