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Complications of the PCA anatomic patella
1Phoenix Orthopedic Residency Program, Maricopa Medical Center, AZ 85008.
Orthopedics
|November 1, 1989
Summary
The PCA anatomic patella component in total knee arthroplasty was linked to a high rate of patellar complications, including subluxation and fracture. Precise alignment is crucial to mitigate risks associated with its eccentric design.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Medical Device Analysis
Background:
- Total knee arthroplasty (TKA) is a common procedure to alleviate knee pain.
- Patellar component selection is critical for TKA outcomes.
- The PCA anatomic patella component has been used in TKA procedures.
Purpose of the Study:
- To evaluate the complication rate associated with the PCA anatomic patella component in TKA.
- To identify specific complications related to this patellar component.
- To assess the impact of component alignment on patellar complications.
Main Methods:
- Retrospective review of total knee arthroplasties.
- Evaluation of 87 knees in 75 patients.
- Average follow-up period of 16 months.
- Analysis of patellar complications and secondary procedures.
Main Results:
- A high rate of patellar complications (16%) was observed.
- Complications included lateral subluxation, patellar fracture, patellar tendon rupture, and prosthetic loosening.
- Seven patients required secondary procedures, with four having compromised outcomes.
Conclusions:
- The PCA anatomic patella component may increase the risk of complications due to its eccentric shape and central ridge.
- Precise component alignment is essential to minimize forces and reduce complication risk.
- This component may be less forgiving of malalignment compared to standard dome-shaped components.