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- Title
Biomechanical and Kinematic Influences of a Total Infrapatellar Fat Pad Resection on the Knee.
- Authors
Bohnsack, Michael; Wilharm, Arne; Hurschler, Christof; Rühmann, Oliver; Stukenborg-Colsman, Christina; Wirth, Carl Joachim
- Abstract
Background: This biomechanical study was performed to evaluate the consequences of total infrapatellar fat pad resection on knee kinematics and patellar contact pressure. Hypothesis: Resection of the infrapatellar fat pad produces significant changes in knee kinematics and patellar contact pres- sure. Study Design: Biomechanical cadaveric study. Methods: Isokinetic knee extension was simulated on 10 human knee cadaveric specimens (6 men, 4 women; mean age at death, 44 years). Joint kinematics were evaluated by an ultrasound-based 3D motion analysis system, and retro-patellar contact pressure was measured using an electronic pressure-sensitive film. All data were taken before and after resection of the infrapatellar fat pad and statistically analyzed. Results: A total resection of the infrapatellar fat pad resulted in a significant decrease of the tibial external rotation relative to the femur between 63° of flexion and full knee extension (maximum: 3° rotation difference at 0° knee flexion, P = .011), combined with a significant medial translation of the patella between 29° and 69° of knee flexion (range, 0.9-1.3 mm, P = .01 7-.028). Retro-patellar contact pressure was significantly reduced (from 20% to 25%, P = .008-.021) at all flexion angles. Conclusion: A resection of the infrapatellar fat influences patellar biomechanics and knee kinematics. Clinical Relevance: The infrapatellar fat pad may have a biomechanical function and may play a role in anterior knee pain syndrome.
- Subjects
JOINTS (Anatomy); KNEE pads; ORTHOPEDIC apparatus; MEDICAL imaging systems; FEMUR; SURGICAL instruments
- Publication
American Journal of Sports Medicine, 2004, Vol 32, Issue 8, p1873
- ISSN
0363-5465
- Publication type
Article
- DOI
10.1177/0363546504263946