Polycentric total knee arthroplasty. A two-year follow-up study.
Polycentric total knee arthroplasty provided significant relief of pain in 86 per cent of 500 knees. The independence and activity levels of the patients increased dramatically. The frequency of major complications as reflected by reoperation was 10 per cent in this series. There was a 2.8 per cent deep infection rate. One-third of the infected knees were salvaged and two-thirds required arthrodesis. Loosening of a component was noted in 2.4 per cent. After operation the average range of motion was from 6 to 101 degrees of flexion, for a range of 95 degrees; this was a 5-degree increase over average preoperative motion. Ninety-six per cent of the patients expressed satisfaction with the surgical result.
D000328:Adult; D000368:Aged; D001178:Arthroplasty / Q000009:adverse effects / Q000379:methods; D001419:Bacteria / Q000302:isolation & purification; D005260:Female; D005500:Follow-Up Studies; D050723:Fractures, Bone / Q000209:etiology; D006801:Humans; D007239:Infections / Q000209:etiology; D004204:Joint Dislocations / Q000209:etiology; D007717:Knee / Q000382:microbiology / Q000502:physiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009068:Movement; D010146:Pain; D011183:Postoperative Complications / Q000209:etiology; D019736:Prostheses and Implants / Q000009:adverse effects; D011474:Prosthesis Design