Medial meniscal extrusion greater than 4 mm reduces medial tibiofemoral compartment contact area: a biomechanical analysis of tibiofemoral contact area and pressures with varying amounts of meniscal extrusion

Purpose The primary objective of this study is to evaluate the contact areas, contact pressures, and peak pressures in the medial compartment of the knee in six sequential testing conditions. The secondary objective is to establish how much the medial meniscus is able to extrude, secondary to soft t...

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Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2021-09, Vol.29 (9), p.3124-3132
Main Authors: Debieux, Pedro, Jimenez, Andrew E., Novaretti, João Victor, Kaleka, Camila Cohen, Kriscenski, Danielle E., Astur, Diego Costa, Obopilwe, Elifho, Tamburini, Lisa M., Muench, Lukas N., Cote, Mark P., Cohen, Moises, Coyner, Katherine J.
Format: Article
Language:English
Subjects:
Biomechanical engineering
Biomechanics
Cadavers
Contact angle
Contact pressure
Extrusion
Injuries
Knee
Medicine
Medicine & Public Health
Meniscus
Orthopedics
Peak pressure
Pressure
Repair
Soft tissues
Sports Medicine
Statistical analysis
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Summary:Purpose The primary objective of this study is to evaluate the contact areas, contact pressures, and peak pressures in the medial compartment of the knee in six sequential testing conditions. The secondary objective is to establish how much the medial meniscus is able to extrude, secondary to soft tissue injury while keeping its roots intact. Methods Ten cadaveric knees were dissected and tested in six conditions: (1) intact meniscus, (2) 2 mm extrusion, (3) 3 mm extrusion, (4) 4 mm extrusion, (5) maximum extrusion, (6) capsular based meniscal repair. Knees were loaded with a 1000-N axial compressive force at 0°, 30°, 60°, and 90° for each condition. Medial compartment contact area, average contact pressure, and peak contact pressure data were recorded. Results When compared to the intact state, there was no statistically significant difference in medial compartment contact area at 2 mm of extrusion or 3 mm of extrusion (n.s.). There was a statistically significant decrease in contact area compared to the intact state at 4 mm ( p  = 0.015) and maximum extrusion ( p  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-020-06363-0