Saturday, March 3, 2001
Cemented, posterior-stabilized total knee arthroplasty (TKA) provides excellent long-term clinical results with 94 percent survival at 23 years in patients less than 55 years old, say investigators in poster exhibit 443.
They reviewed their experience with TKAs performed between 1977 and 1992 in patients who were 55 years of age or less to determine the functional, clinical and radiographic results in this subset of patients with the diagnosis of osteoarthritis or post-traumatic arthritis.
Ninety-six unrevised knees in 76 patients were available for clinical evaluation. The mean age at arthroplasty was 51 (range: 39 to 55) years and mean follow-up was 13 (range: 8 to 23) years. One of the TKAs had been revised for aseptic loosening, one for osteolysis and three for late infection. In addition, three patellar components were revised for loosening and one spacer exchanged to treat instability.
The survival rate at 23 years was 94 percent. The surviving knees were assessed using Knee Society and Hospital for Special Surgery Scores, SF-12 as well as Tegner activity scales. In addition, activity levels were independently compared between the patient and significant other.
At latest follow-up, the mean KSS score was 94 and function score 90. The mean HSS score was 91. The mean Tegner score improved from 1.3 points preoperatively to 3.2 points at latest follow-up. Activity levels were rated similarly between the patients and their significant others. Radiographically, 11 percent of the knees had non-progressive radiolucent lines.
Coauthors are Gregory H. Tchejeyan, MD, Thousand Oaks, Calif. and Giles R, Scuderi, MD; Fred D. Cushner, MD; W. Norman Scott, MD; and John N. Insall, MD, all of New York City, N.Y.
|2001 Academy News March 3 Index C|
Last modified 16/February/2001 by IS