In-Vitro Wear and Radiographic Analyses of High Flexion Posterior Stabilized Mobile- and Fixed-Bearing Knee Implants
作者： Oludele Popoola , Ning Yu , Giles Scuderi , K. Trier , S. W. Dean
DOI: 10.1520/JAI103907
关键词:
摘要: In vitro wear tests results and 2-year follow up radiographic analyses of implanted fixed- mobile-bearing LPS Flex knees are compared. The two knee designs use gamma-sterilized GUR 1050 ultra high molecular weight polyethylene (UHMWPE) patellae tibial inserts, the same CoCrMo alloy (ASTM F 75) femoral components. in were performed on six implants using modified ISO 14243-3 load kinematic waveforms. Tests conducted at a frequency 1 Hz for 5 × 106 cycles (Mc) bovine serum lubricant. Two year 341 patients with 173 mobile- 168 fixed-bearing implants. Average accumulative rates 19.9 ± 5.1 mg/Mc 14.2 ± 2.1 mg/Mc, respectively. There is no statistically significant difference both devices (p > 0.05, Mann–Whitney test). Overall survivorship years revision any reason as endpoint was 99.3 % mobile group 100 % fixed group. evidence tibial, femoral, or patella bone loss up. mean active range motion increased from 110.8° to 127.0° bearing 110.7° 127.2° one. Overall, evaluation showed similar performance devices.
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