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Results after knee replacement with a posterior cruciate-substituting prosthesis
W N Scott1, M Rubinstein, G Scuderi
1Department of Orthopedics, Lenox Hill Hospital, New York City.
The Journal of Bone and Joint Surgery. American Volume
|September 1, 1988
Summary
Posterior cruciate-substituting knee arthroplasty improved patient outcomes, offering greater motion than cruciate-sacrificing designs. This study found comparable infection rates and no adverse effects from this implant type.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Knee arthroplasty is a common procedure for debilitating knee conditions.
- Posterior cruciate ligament (PCL) management during knee replacement influences outcomes.
- PCL-substituting designs aim to enhance joint kinematics and patient function.
Purpose of the Study:
- To evaluate the clinical outcomes of posterior cruciate-substituting knee arthroplasty.
- To compare the functional range of motion and patient satisfaction with this implant design.
- To assess the incidence of radiolucencies and infection rates.
Main Methods:
- A retrospective review of 119 knee arthroplasties performed between 1979 and 1984.
- Patients underwent surgery with a posterior cruciate-substituting implant.
- Outcomes were assessed using The Hospital for Special Surgery knee-rating scale and range of motion measurements.
Main Results:
- Average Hospital for Special Surgery scores improved from 47.5 to 90 points.
- Average range of motion increased from 88 to 107 degrees.
- 83% of knees were rated excellent, 15% good; infection rate was 1.6%.
Conclusions:
- Posterior cruciate-substituting knee arthroplasty provides good to excellent clinical results with improved motion.
- This design is comparable to cruciate-sacrificing surface-replacement designs regarding infection rates.
- Rheumatoid arthritis patients showed less favorable outcomes compared to other diagnoses.