TY - JOUR
T1 - Tensile properties of the superior glenohumeral and coracohumeral ligaments.
AU - Boardman, N. D.
AU - Debski, R. E.
AU - Warner, J. J.
AU - Taskiran, E.
AU - Maddox, L.
AU - Imhoff, A. B.
AU - Fu, F. H.
AU - Woo, S. L.
N1 - Funding Information:
From Musculoskeletal Research Center, Department of Ortho-paedic Surgery, Universily of Pittsburgh. The support of the Whitaker Foundation, National Medical Fel Iowships, and the Universily of Pittsburgh Medical Center is gratefully acknowledged. Reprint requests: Jon j. P. Warner, MD, 210 Lothrop St., E 1641 Bioscience Tower, Musculoskeletal Research Center, Depart-ment of Orthopaedic Surgery, University of Pittsburgh, Pitts-burgh, PA 15213. Copyright 9 1996 by Journal of Shoulder and Elbow Surgery Board of Trustees. 1058-2746/96/$5.00 + 0 32/!/71203
PY - 1996
Y1 - 1996
N2 - Recent evidence has shown that the superior glenohumeral ligament (SGHL) and coracohumeral ligament (CHL) are important static stabilizers. To clarify the function of these two ligaments, we studied their tensile properties with bone-ligament-bone complexes from fresh-frozen shoulders, 10 SGHLs and 10 CHLs. Each ligament's cross-sectional area was measured, and uniaxial tensile testing of each complex was performed. The stiffness, ultimate load, percent elongation, and energy absorbed to failure of each bone-ligament-bone complex were derived from its load-elongation curve. The cross-sectional area of the coracohumeral ligament was significantly greater than that of the superior glenohumeral ligament of their midportions (CHL, 53.7 +/- 3.2 mm2 vs. SGHL, 11.3 +/- 1.6 mm2, p < 0.05). Results also reveal significant differences between the tensile properties for the two ligaments, with the coracohumeral ligament possessing greater stiffness (CHL, 36.7 +/- 5.9 N/mm vs. SGHL, 17.4 +/- 1.5 N/mm, p < 0.05) and ultimate load (CHL, 359.8 +/- 40.3 N vs. SGHL, 101.9 +/- 11.5 N, p < 0.05) than the superior glenohumeral ligament. Our findings confirm that the coracohumeral ligament is an important capsuloligamentous structure of the glenohumeral joint.
AB - Recent evidence has shown that the superior glenohumeral ligament (SGHL) and coracohumeral ligament (CHL) are important static stabilizers. To clarify the function of these two ligaments, we studied their tensile properties with bone-ligament-bone complexes from fresh-frozen shoulders, 10 SGHLs and 10 CHLs. Each ligament's cross-sectional area was measured, and uniaxial tensile testing of each complex was performed. The stiffness, ultimate load, percent elongation, and energy absorbed to failure of each bone-ligament-bone complex were derived from its load-elongation curve. The cross-sectional area of the coracohumeral ligament was significantly greater than that of the superior glenohumeral ligament of their midportions (CHL, 53.7 +/- 3.2 mm2 vs. SGHL, 11.3 +/- 1.6 mm2, p < 0.05). Results also reveal significant differences between the tensile properties for the two ligaments, with the coracohumeral ligament possessing greater stiffness (CHL, 36.7 +/- 5.9 N/mm vs. SGHL, 17.4 +/- 1.5 N/mm, p < 0.05) and ultimate load (CHL, 359.8 +/- 40.3 N vs. SGHL, 101.9 +/- 11.5 N, p < 0.05) than the superior glenohumeral ligament. Our findings confirm that the coracohumeral ligament is an important capsuloligamentous structure of the glenohumeral joint.
UR - http://www.scopus.com/inward/record.url?scp=0030179798&partnerID=8YFLogxK
U2 - 10.1016/S1058-2746(96)80050-4
DO - 10.1016/S1058-2746(96)80050-4
M3 - Article
C2 - 8872921
AN - SCOPUS:0030179798
SN - 1058-2746
VL - 5
SP - 249
EP - 254
JO - Journal of Shoulder and Elbow Surgery
JF - Journal of Shoulder and Elbow Surgery
IS - 4
ER -