Archives of Orthopaedic and Trauma Surgery

, Volume 133, Issue 5, pp 621–626

Biomechanical consequences of a posterior root tear of the lateral meniscus: stabilizing effect of the meniscofemoral ligament

  • Philipp Forkel
  • Mirco Herbort
  • Martin Schulze
  • Dieter Rosenbaum
  • Lars Kirstein
  • Michael Raschke
  • Wolf Petersen
Orthopaedic Surgery

DOI: 10.1007/s00402-013-1716-7

Cite this article as:
Forkel, P., Herbort, M., Schulze, M. et al. Arch Orthop Trauma Surg (2013) 133: 621. doi:10.1007/s00402-013-1716-7

Abstract

Purpose

The purpose of this study was to evaluate the effects of different types of lateral meniscus root tears in terms of tibiofemoral contact stress.

Methods

Ten porcine knees each underwent five different testing conditions with the menisci intact, a simulated lateral posterior root tear with and without cutting the meniscofemoral ligament and with an artificial tear of the posterior root of the medial meniscus. Biomechanical testing was performed at 30° of flexion with an axial load of 100 N. A pressure sensor (st Sensor Type S2042, Novel, Munich) was used to measure the tibiofemoral contact area and the tibiofemoral contact pressure. Data were analyzed to assess the differences in contact area and tibiofemoral peak contact pressure among the five meniscal conditions.

Results

There was no significant difference in mean contact pressure between the state with the menisci intact and an isolated posterior root tear of the lateral meniscus. In case of a root tear and a tear of the meniscofemoral ligament, the contact area decreased in comparison with the intact state of the menisci. After additional cutting of the meniscofemoral ligament, the tibiofemoral contact pressure was significantly higher in comparison with the intact state and the avulsion injury. In the medial compartment, joint compression forces were significantly increased in comparison with the intact state after cutting the posterior root of the medial meniscus (P < 0.05).

Conclusions

The consequence of a medial meniscus root tear is well known and was verified by this analysis. The results of the present study show that the biomechanical consequences of a lateral meniscus root tear depend on the state of the meniscofemoral ligament. An increase in tibiofemoral contact pressure is only to be expected in combined injuries of the meniscus root and the meniscofemoral ligaments.

Clinical relevance

Posterior lateral meniscus root tear might have a better prognosis in terms of the development of osteoarthritis when the meniscofemoral ligament is intact.

Keywords

Lateral meniscus Meniscofemoral ligament Root tear Intraarticular pressure Intraarticular contact area 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Philipp Forkel
    • 1
  • Mirco Herbort
    • 2
  • Martin Schulze
    • 2
  • Dieter Rosenbaum
    • 3
  • Lars Kirstein
    • 1
  • Michael Raschke
    • 2
  • Wolf Petersen
    • 1
  1. 1.Klinik für Orthopädie und UnfallchirurgieMartin Luther KrankenhausBerlinGermany
  2. 2.Klinik für Unfall-, Hand- und WiederherstellungschirurgieUniversitätsklinikum MünsterMünsterGermany
  3. 3.Klinik für Orthopädie und TumororthopädieUniversitätsklinikum MünsterMünsterGermany