Conversion of Failed Unicompartmental Knee Arthroplasty to TKA
- 1 May 2006
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health)
- Vol. 446, 214-220
- https://doi.org/10.1097/01.blo.0000214431.19033.fa
Abstract
As the number of unicompartmental knee arthroplasties performed continues to rise, so too will the number of failures. In order to justify its continued use, conversion to total knee arthroplasty must be evaluated. From 1993-2004, 22 consecutive knees from 18 patients with a failed unicondylar knee arthroplasty underwent conversion to total knee arthroplasty. The most common modes of failure were polyethylene wear (12 patients), loosening of the femoral (4 patients) or tibial component (3 patients), and osteoarthritis progression (3 patients). All patients were converted to primary cruciate retaining components. Twenty-seven percent of patients had contained defects on the femoral condyle that required bone graft. No femoral stems or metal augmentation were required. Forty-five percent of patients had contained defects on the tibia that required bone graft. Metal wedge augmentation was required in five knees (23%), and stems were used in two patients. Sixteen of 22 knees (73%) were followed for an average of 64.5 months. Knee Society knee scores and functional scores at latest followup were 93 and 78, respectively. Conversion of a failed unicondylar knee arthroplasty to a total knee arthroplasty is technically demanding, but may be done successfully with careful preoperative planning and possible need for revision techniques. Therapeutic study, level IV (case series). See the Guidelines for Authors for a complete description of levels of evidence.Keywords
This publication has 26 references indexed in Scilit:
- Unicompartmental Knee Arthroplasty for Younger PatientsClinical Orthopaedics and Related Research, 2002
- Orthopaedic crossfire®—Can we justify unicondylar arthroplasty as a temporizing procedure? In oppositionThe Journal of Arthroplasty, 2002
- Orthopaedic crossfire®—Can we justify unicondylar arthroplasty as a temporizing procedure? In the affirmativeThe Journal of Arthroplasty, 2002
- Unicompartmental Knee ArthroplastyPublished by Ovid Technologies (Wolters Kluwer Health) ,2001
- Femoral Component Rotation During Total Knee ArthroplastyPublished by Ovid Technologies (Wolters Kluwer Health) ,1999
- Unicompartmental Knee ArthroplastyPublished by Ovid Technologies (Wolters Kluwer Health) ,1999
- Early failure of the porous coated anatomic cemented unicompartmental knee arthroplasty: Aids to diagnosis and revisionThe Journal of Arthroplasty, 1997
- Unicompartmental Knee ArthroplastyClinical Orthopaedics and Related Research, 1991
- Rationale, of The Knee Society Clinical Rating SystemClinical Orthopaedics and Related Research, 1989
- The Knee Society Total Knee Arthroplasty Roentgenographic Evaluation and Scoring SystemClinical Orthopaedics and Related Research, 1989