TY - JOUR
T1 - Experimental determination of forces transmitted through the patello-femoral joint
AU - Buff, Hans Ulrich
AU - Jones, Lynne C.
AU - Hungerford, David S.
N1 - Funding Information:
Statisticacl omparisonsw erem adeu sing One-Way Analysis of Variance,w ith the Student’s T test for comparisonsb etweeng roups.C omputationala ssist-ance was receivedf rom CLINFO sponsoredb y the NIH Grant No. SMOI-RR-35-20.
PY - 1988
Y1 - 1988
N2 - Tensions in the quadriceps tendon and infrapatellar ligament were measured as a function of flexion angle in eight cadaver knees using a load cell of a materials tester to determine the quadriceps force and a spring balance to quantify the patellar tendon force. The ratio between the tensions in the quadriceps tendon and the patellar tendon ( FQ FP) ranged from 1.55 at 70° of flexion to 0.86 at 10° of flexion. The patello-femoral joint reaction (PFJR) force for extension against resistance was maximal at 60°. No change in the quadriceps force required to extend the knee occurred with changes of the Q-angle of ±5°. This study demonstrates that FQ does not equal FP as several authors have reported (Bandi, 1972; Barry, 1979; Ficat and Hungerford, 1977; Hungerford and Barry, 1979; Reilly and Martens, 1972; Smidt, 1973). Furthermore, the difference in FQ and FP influences both the magnitude and direction of PFJR. Studies that assess the influence of surgical procedures which alter the patello-femoral joint or the extensor mechanism must take these differences into account.
AB - Tensions in the quadriceps tendon and infrapatellar ligament were measured as a function of flexion angle in eight cadaver knees using a load cell of a materials tester to determine the quadriceps force and a spring balance to quantify the patellar tendon force. The ratio between the tensions in the quadriceps tendon and the patellar tendon ( FQ FP) ranged from 1.55 at 70° of flexion to 0.86 at 10° of flexion. The patello-femoral joint reaction (PFJR) force for extension against resistance was maximal at 60°. No change in the quadriceps force required to extend the knee occurred with changes of the Q-angle of ±5°. This study demonstrates that FQ does not equal FP as several authors have reported (Bandi, 1972; Barry, 1979; Ficat and Hungerford, 1977; Hungerford and Barry, 1979; Reilly and Martens, 1972; Smidt, 1973). Furthermore, the difference in FQ and FP influences both the magnitude and direction of PFJR. Studies that assess the influence of surgical procedures which alter the patello-femoral joint or the extensor mechanism must take these differences into account.
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U2 - 10.1016/0021-9290(88)90187-X
DO - 10.1016/0021-9290(88)90187-X
M3 - Article
C2 - 3339023
AN - SCOPUS:0023901273
SN - 0021-9290
VL - 21
SP - 17
EP - 23
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 1
ER -