Τίτλος:
Quantified kinematics of the injury to the posterior cruciate ligament:
a computer-aided design simulation study
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Objective. To quantify the kinematics of the injury to the posterior
cruciate and the other major knee ligaments as a function of the knee
flexion angle at the moment of impact.
Design. Computer-aided design modelling was used to investigate the
strain response of all major knee ligaments during anteroposterior
abnormal tibio-femoral translation at 0-90 degrees knee flexion.
Background. It is generally believed that the likelihood of injury to
the posterior cruciate ligament following anterior impact is higher in
the flexed knee. However, there are no kinematical studies to quantify
this clinical observation or investigate the role of the other knee
ligaments in the above situation.
Methods. Computer calculations of the individual ligament strain were
plotted against the magnitude of posterior tibial translation.
Additionally, the strain rate for each ligament (defined as the ligament
strain produced per mm of posterior tibial linear translation) was
calculated as the slope of the strain-displacement curve for all tested
degrees of knee flexion.
Results. The posterior cruciate ligament has been shown to be the
primary restraint to posterior tibial translation in all degrees of knee
flexion. However, at 90 degrees of knee flexion the strain rate of the
posterior cruciate ligament is approximately half that in the fully
extended knee and the posterior cruciate ligament is the only ligament
to resist posterior tibial translation.
Conclusions. The strain behaviour of the posterior cruciate ligament
during injury is highly dependent on the knee flexion during the moment
of impact. Forced posterior tibial translation in the 90 degrees flexed
knee may result in isolated posterior cruciate ligament deficit rather
than a complex ligament disruption. The strain rate of a ligament as
introduced in the present study is a quantified parameter related to the
resistance that the ligament imposes to an abnormal joint movement.
Relevance This study provides insight into the differential strain of
the knee ligaments during impacts that result in posterior cruciate
ligament injury. Studies that quantify the strain behaviour of
individual knee ligaments are important to the understanding, diagnosis
and prevention of injuries sustained during contact sports and
high-energy road traffic accidents. (C) 2001 Elsevier Science Ltd. All
rights reserved.
Συγγραφείς:
Karnezis, IA
Fragkiadakis, EG
Webb, JM
Hardy, JRW
Περιοδικό:
Clinical Biomechanics
Εκδότης:
Elsevier Sci Ltd, Exeter, United Kingdom
Λέξεις-κλειδιά:
ligaments; posterior cruciate ligament; knee injuries; soft tissue
injuries; computer simulation
DOI:
10.1016/S0268-0033(00)00067-X
