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Deep-dish congruent tibial component use in total knee arthroplasty: a randomized prospective study
R S Laskin1, Y Maruyama, M Villaneuva
1The Hospital for Special Surgery, New York, NY 10021, USA.
Clinical Orthopaedics and Related Research
|November 7, 2000
Summary
This study found no significant differences in knee osteoarthritis outcomes between posterior stabilized and deep-dish tibial components. Both implants offer comparable functional results and excellent alignment after surgery.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Osteoarthritis of the knee is a prevalent degenerative joint disease.
- Total knee arthroplasty (TKA) is a common surgical intervention for end-stage knee osteoarthritis.
- Evaluating different tibial component designs is crucial for optimizing TKA outcomes.
Purpose of the Study:
- To compare the clinical and radiographic outcomes of posterior stabilized (PS) tibial components versus deep-dish (DD) tibial components (Genesis II) in TKA for knee osteoarthritis.
- To assess functional recovery, pain, stability, and implant alignment between the two component types.
Main Methods:
- A prospective randomized study involving 176 patients with knee osteoarthritis undergoing TKA.
- Both groups had posterior cruciate ligament release.
- One group received a PS tibial component, the other a DD tibial component; all implants were cemented.
Main Results:
- No statistically significant differences were observed in mean range of flexion (approx. 116°), stair-climbing ability (80%), pain scores, knee scores (94 points), stability, or anterior knee pain.
- Excellent postoperative implant alignment was achieved in both groups in sagittal, coronal, and Merchant views.
- Only one lateral release was needed, in a patient with a DD component.
Conclusions:
- Both posterior stabilized and deep-dish tibial components yield comparable clinical and radiographic results in TKA for knee osteoarthritis.
- The deep-dish component design may obviate the need for intercondylar femoral bone resection, potentially preserving bone stock for future revisions.