Wedged tibial components for total knee arthroplasty
| Autor: | M.A. Orton, R.A. Denham, R.S. Jeffery |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
musculoskeletal diseases
Male Reoperation Time Factors Knee Joint medicine.medical_treatment Dentistry Prosthesis Design Prosthesis Condyle Arthritis Rheumatoid Fixation (surgical) Osteoarthritis medicine Deformity Humans Orthopedics and Sports Medicine Tibia Aged Retrospective Studies Varus deformity business.industry musculoskeletal system medicine.disease Arthroplasty Joint Deformities Acquired Coronal plane Female medicine.symptom business Knee Prosthesis Follow-Up Studies |
| Zdroj: | The Journal of arthroplasty. 9(4) |
| ISSN: | 0883-5403 |
| Popis: | Severe coronal deformity of the knee is frequently associated with erosion of one tibial condyle. This can cause problems with fixation and alignment during total knee arthroplasty. If the tibia is cut to the level of the more worn side, valuable bone is sacrificed; if the less worn side is chosen, the deficiency must be filled with bone--graft, cement, or a prosthesis. Tibial components with an integral polyethylene wedge on the undersurface were introduced in 1980 for use in patients with a bony deficit on one tibial condyle. The authors believe that the Denham prosthesis (Biomet, Wales, U.K.) was the first knee arthroplasty to offer such spacers. Twenty-six patients with preoperative varus deformity in whom a wedged component was used were compared with 29 historic control subjects. None of the wedged components loosened after a median follow-up period of 8 years compared with loosening in five of the control subjects (P = .01). In three of the control subjects a fractured triangle of cement was present on the radiographs. Use of the wedges was not accompanied by an improvement in postoperative alignment. The authors conclude that the wedges resulted in improved fixation that was independent of postoperative alignment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|