TY - JOUR
T1 - Mechanical loads at the knee joint during deep flexion
AU - Nagura, Takeo
AU - Dyrby, Chris O.
AU - Alexander, Eugene J.
AU - Andriacchi, Thomas P.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - There is a lack of fundamental information on the knee biomechanics in deep flexion beyond 90°. In this study, mechanical loads during activities requiring deep flexion were quantified on normal knees from 19 subjects, and compared with those in walking and stair climbing. The deep flexion activities generate larger net quadriceps moments (6.9-13.5% body weight into height) and net posterior forces (58.3-67.8% body weight) than routine ambulatory activities. Moreover, the peak net moments and the net posterior forces were generated between 90° and 150° of flexion. The large moments and forces will result in high stress at high angles of flexion. These loads can influence pathological changes to the joint and are important considerations for reconstructive procedures of the knee. The posterior cruciate ligament should have a substantial role during deep flexion, since there was a large posterior load that must be sustained at the knee. The mechanics of the knee in deep flexion are likely a factor causing problems of posterior instability in current total knee arthroplasty. Thus, it is important to consider the magnitude of the loads at the knee in the treatment of patients that commonly perform deep flexion during activities of daily living.
AB - There is a lack of fundamental information on the knee biomechanics in deep flexion beyond 90°. In this study, mechanical loads during activities requiring deep flexion were quantified on normal knees from 19 subjects, and compared with those in walking and stair climbing. The deep flexion activities generate larger net quadriceps moments (6.9-13.5% body weight into height) and net posterior forces (58.3-67.8% body weight) than routine ambulatory activities. Moreover, the peak net moments and the net posterior forces were generated between 90° and 150° of flexion. The large moments and forces will result in high stress at high angles of flexion. These loads can influence pathological changes to the joint and are important considerations for reconstructive procedures of the knee. The posterior cruciate ligament should have a substantial role during deep flexion, since there was a large posterior load that must be sustained at the knee. The mechanics of the knee in deep flexion are likely a factor causing problems of posterior instability in current total knee arthroplasty. Thus, it is important to consider the magnitude of the loads at the knee in the treatment of patients that commonly perform deep flexion during activities of daily living.
KW - Deep flexion
KW - Gait
KW - Knee biomechanics
KW - Total knee arthroplasty
UR - http://www.scopus.com/inward/record.url?scp=0036312259&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036312259&partnerID=8YFLogxK
U2 - 10.1016/S0736-0266(01)00178-4
DO - 10.1016/S0736-0266(01)00178-4
M3 - Article
C2 - 12168682
AN - SCOPUS:0036312259
VL - 20
SP - 881
EP - 886
JO - Journal of Orthopaedic Research
JF - Journal of Orthopaedic Research
SN - 0736-0266
IS - 4
ER -