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Titolo:
Relative contribution of the ACL, MCL, and bony contact to the anterior stability of the knee
Autore:
Sakane, M; Livesay, GA; Fox, RJ; Rudy, TW; Runco, TJ; Woo, SLY;
Indirizzi:
Univ Pittsburgh, Med Ctr, Dept Orthopaed Surg, Musculoskeletal Res Ctr, Pittsburgh, PA 15213 USA Univ Pittsburgh Pittsburgh PA USA 15213 Res Ctr, Pittsburgh, PA 15213 USA
Titolo Testata:
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
fascicolo: 2, volume: 7, anno: 1999,
pagine: 93 - 97
SICI:
0942-2056(199903)7:2<93:RCOTAM>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
IN-SITU FORCES; LIGAMENT TENSION PATTERN; CRUCIATE LIGAMENT; FLEXED KNEE; INJURIES; TEARS; HEMARTHROSIS; SENSOR;
Keywords:
anterior knee stability; anterior cruciate ligament; medial collateral ligament;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Woo, SLY Univ Pittsburgh, Med Ctr, Dept Orthopaed Surg, Musculoskeletal Res Ctr, 210 Lothrop St,E1641-BST,POB 71199, Pittsburgh, PA 15213 USA Univ Pittsburgh 210 Lothrop St,E1641-BST,POB 71199 Pittsburgh PA USA 15213
Citazione:
M. Sakane et al., "Relative contribution of the ACL, MCL, and bony contact to the anterior stability of the knee", KNEE SURG S, 7(2), 1999, pp. 93-97

Abstract

Ligaments and other soft tissues, as well as bony contact, all contribute to anterior stability of the knee joint. This study was designed to measurethe in situ force in the medial collateral ligament (MCL), anterior cruciate ligament (ACL), posterolateral structures (PLS), and posterior cruciate ligament (PCL) in response to 110 N anterior tibial loading. The changes inknee kinematics associated with ACL deficiency and combined MCL+ACL deficiency were also evaluated. Utilizing a robotic/universal force-moment sensorsystem, ten human cadaveric knee joints were tested between 0 degrees and 90 degrees of knee flexion. This unique testing system is designed to determine the in situ forces in structures of interest without making mechanicalcontact with the tissue. More importantly, data for individual structures can be obtained from the same knee specimen since the robotic manipulator can reproduce the motion of the intact knee. The in situ forces in the ACL under anterior tibial loading to 110 N were highest at 15 degrees flexion, 103 +/- 14 N (mean +/- SD), decreasing to 59.2 +/- 30 N at 90 degrees flexion. For the MCL, these forces were 8.0 +/- 3.5 N and 38.1 +/- 25 N, respectively. Forces due to bony contact were as high as 34.1 +/- 23 N at 30 degrees flexion, while those in the PLS were relatively small at all flexion angles. Combined MCL+ACL deficiency was found to significantly increase anterior tibial translation relative to the ACL-deficient knee only above 60 degrees of knee flexion. These findings confirm the hypothesis that there is significant load sharing between various ligaments and bony contact during anterior tibial loading of the knee. For this reason, the MCL and osteochondral surfaces may also be at significant risk during ACL injury.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 17:37:01