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The anatomic total knee resurfacing arthroplasty
Clinical Orthopaedics and Related Research
|January 1, 1985
Summary
Total knee arthroplasty (TKA) success hinges on replicating natural joint function. Proper alignment and implant fit are crucial for excellent long-term outcomes, minimizing complications like loosening.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Biomechanical Engineering
Background:
- Total knee arthroplasty (TKA) long-term success depends on accurately replicating native joint anatomy, mechanics, and kinematics.
- Deviations in alignment, implant design, sizing, or positioning are primary causes of limited motion and implant loosening post-surgery.
Purpose of the Study:
- To evaluate the long-term efficacy and complications of the Anatomic Total Knee (ATK) arthroplasty.
- To identify factors contributing to mechanical complications and revision rates in TKA.
Main Methods:
- Review of 532 cemented ATK replacements with a follow-up period of 2 to 11 years.
- Assessment of outcomes based on pain relief, range of motion, and patient activity levels.
- Analysis of mechanical complications, particularly patellar issues and tibial component loosening.
Main Results:
- 89% of knees demonstrated excellent or good long-term results regarding pain, motion, and activity.
- Tibial component loosening occurred in less than 2% of cases, often linked to technical malalignment.
- Patellar problems and tibial loosening were the most frequent mechanical complications necessitating revision surgery.
Conclusions:
- The ATK arthroplasty demonstrates high long-term success rates when surgical technique and implant fit closely mimic natural joint function.
- Technical malalignment is a significant risk factor for tibial component loosening.
- Porous-surfaced implants and noncemented techniques show promise for enhanced long-term stabilization.