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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24339

Title: The Anterolateral Ligament Has Similar Biomechanical and Histologic Properties to the Inferior Glenohumeral Ligament
Authors: Smeets, Kristof
Slane, Josh
Scheys, Lennart
Forsyth, Ramses
Claes, Steven
Bellemans, Johan
Issue Date: 2017
Abstract: Purpose: To characterize the tensile and histologic properties of the anterolateral ligament (ALL), inferior glenohumeral ligament (IGHL), and knee capsule. Methods: Standardized samples of the ALL (n = 19), anterolateral knee capsule (n = 15), and IGHL (n = 13) were isolated from fresh-frozen human cadavers for uniaxial tensile testing to failure. An additional 6 samples of the ALL, capsule, and IGHL were procured for histologic analysis and determination of elastin content. Results: All investigated mechanical properties were significantly greater for both the ALL and IGHL when compared with capsular tissue. In contrast, no significant differences between the ALL and IGHL were found for any property. The elastic modulus of ALL and IGHL samples was 174 +/- 92 MPa and 139 +/- 60 MPa, respectively, compared with 62 +/- 30 MPa for the capsule (P +/- .001). Ultimate stress was significantly lower (P < .001) for the capsule, at 13.4 +/- 7.7 MPa, relative to the ALL and IGHL, at 46.4 +/- 20.1 MPa and 38.7 +/- 16.3 MPa, respectively. The ultimate strain at failure was 37.8% +/- 7.9% for the ALL and 39.5% +/- 9.4% for the IGHL; this was significantly greater (P = .041 and P = .02, respectively) for both relative to the capsule, at 32.6% +/- 8.4%. The strain energy density was 7.8 +/- 3.1 MPa for the ALL, 2.1 +/- 1.3 MPa for the capsule, and 7.1 +/- 3.1 MPa for the IGHL (P < .001). The ALL and IGHL consisted of collagen bundles aligned in a parallel manner, containing elastin bundles, which was in contrast to the random collagen architecture noted in capsule samples. Conclusions: The ALL has similar tensile and histologic properties to the IGHL. The tensile properties of the ALL are significantly greater than those observed in the knee capsule.
Notes: [Smeets, Kristof] Hasselt Univ, Doctoral Sch Med & Life Sci, Hasselt, Belgium. [Smeets, Kristof; Bellemans, Johan] Ziekenhuis Oost Limburg, Dept Orthoped Surg, Genk, Belgium. [Slane, Josh; Scheys, Lennart] Univ Hosp Leuven, Inst Orthopaed Res & Training, Campus Pellenberg, Pellenberg, Belgium. [Forsyth, Ramses] Univ Hosp Brussels, Dept Pathol, Brussels, Belgium. [Claes, Steven] AZ Herentals Hosp, Dept Orthoped Surg, Herentals, Belgium.
URI: http://hdl.handle.net/1942/24339
DOI: 10.1016/j.arthro.2017.01.038
ISI #: 000402470800029
ISSN: 0749-8063
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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