Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 1 Demographics were homogeneous in the six cohorts, whereas implant-related features were not similar
Demographics and implant features | ||||||
|---|---|---|---|---|---|---|
M-ANAT | NM-ANAT | M-CON | NM-CON | M-TAP | NM-TAP | |
Number of implants | 1072 | 363 | 1020 | 1267 | 548 | 1491 |
Mean age (years) | 58.3 | 59.8 | 58.3 | 58.9 | 61 | 63 |
Female gender (%) | 79 | 70.5 | 82.9 | 80.4 | 75.4 | 71 |
BMI (kg/m2) between 19 and 25 (%) | 48.8 | 39.3 | 48.5 | 46.5 | 45.7 | 39.9 |
BMI (kg/m2) > 30 (%) | 11.9 | 14.7 | 12.8 | 13.8 | 12.3 | 18.1 |
Most used implants | ||||||
Stems | AncaFit (528) Apta (503) Sam-Fit (20) | ABG II (151) CFP (48) Fit (37) | Modulus (578) Alata Acuta (364) Profemur C (51) | Conus (932) ADR (70) | Recta (170) Hydra (111) EHS (45) | SL-Plus (159) Taperloc (110) CLS (98) |
Cups | AncaFit (501) Fixa Ti-Por (330) Fixa (169) | ABG II (142) Delta PF (31) Top (29) | Fixa Ti-Por (273) Delta TT (272) Delta PF (254) | Protek SC (146) Continuum (96) CLS (95) | Fixa Ti-Por (187) Fixa (115) AncaFit (100) | EP-Fit Plus S and N (180) R3 (90) EP-Fit Plus Endoplus (85) |
Cup type | ||||||
Cementless, press-fit | 44.1% | 64.5% | 65.1% | 56.7% | 59.5% | 63.9% |
Cementless, press-fit, with wings | 38.8% | 1.7% | 3.4% | 13.0% | 15.5% | 6.1% |
Cementless, press-fit, with screws | 17.1% | 33.1% | 31.5% | 23.4% | 25.0% | 25.9% |
Cementless, external thread | 0.0% | 0.8% | 0.0% | 6.8% | 0.0% | 4.1% |
Bearing surfaces | ||||||
CoC | 80.7 | 53 | 85.1 | 22.0 | 67 | 45.9 |
CoP | 15.2 | 17.1 | 11.1 | 32.9 | 23.2 | 27.5 |
MoP | 3.9 | 24 | 3.6 | 22 | 7.8 | 15.4 |
MoM | 0 | 0.8 | 0 | 20.6 | 0.4 | 4.2 |
Head size < 36 mm (%) | 85.3 | 73.2 | 61.6 | 89 | 72.6 | 64.4 |
Follow-up (years) | 10.7 | 9.4 | 6.5 | 10.1 | 8.5 | 6.7 |
Implants at risk at 10 years (%) | 59.9 | 53.4 | 23.2 | 53.7 | 37.4 | 28.5 |