The effect of an augmentation patella prosthesis versus patelloplasty on revision patellar kinematics and quadriceps tendon force: an ex vivo study.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 18534488.
- Also identified by DOI 10.1016/j.arth.2007.09.018.
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Abstract
The purpose of this study was to assess the effect of 2 revision reconstructive interventions on patellofemoral joint mechanics in comparison to control. We flexed 8 cadaver knee specimens from 0 degrees to 60 degrees of flexion in a test rig designed to simulate weight-bearing flexion and extension (Oxford rig). Quadriceps tendon extensor force and patellar kinematics were recorded for control total knee arthroplasty (TKA) (normal primary TKA with patella resurfaced) and then for each of the 2 revision patellar interventions (after patelloplasty of typical revision knee patellar bone defect to leave a simple bony shell, and after TKA with augmentation patella resurfacing). Our results demonstrate that patellar kinematics and quadriceps extensor force are optimized when the patella is reconstructed to normal anteroposterior thickness.
Medical subject headings
- Arthroplasty, Replacement, Knee
- Knee Prosthesis
- Patella
- Patellar Ligament
- Quadriceps Muscle
- Reoperation
Anatomy
- knee