TY - JOUR
T1 - Mechanical environment of the supraspinatus tendon
T2 - Three-dimensional finite element model analysis
AU - Seki, Nobutoshi
AU - Itoi, Eiji
AU - Shibuya, Yotsugi
AU - Wakabayashi, Ikuko
AU - Sano, Hirotaka
AU - Sashi, Ryuji
AU - Minagawa, Hiroshi
AU - Yamamoto, Nobuyuki
AU - Abe, Hidekazu
AU - Kikuchi, Kazuma
AU - Okada, Kyoji
AU - Shimada, Yoichi
PY - 2008/7
Y1 - 2008/7
N2 - Background. We analyzed the mechanical environment of the supraspinatus tendon using a three-dimensional finite element model with the software programs MENTAT and MARC. Methods. The supraspinatus tendon that attaches to the superior facet was extracted and modeled. The geometric shape of the humeral head was determined from computed tomography images, and the shape of the supraspinatus tendon was determined from magnetic resonance images of the shoulder at 0° of abduction in a healthy 27-year-old man. The distal portion of the humeral head was fixed, and 10 N of tensile force was applied to the proximal end of the tendon. The tensile stress was calculated. Results. The tensile stress was 1.8 MPa for the bursal side and 15.0 MPa for the articular side of the anterior portion of the supraspinatus tendon. The intensity was 0 MPa for the bursal side and 4.5 MPa for the articular side of the middle portion of the tendon. The intensity was 0.1 MPa for the bursal side and 5.2 MPa for the posterior edge of the tendon. Conclusions. Based on the three-dimensional finite element method, the maximal tensile stress was observed on the articular side of the anterior edge of the supraspinatus tendon. Our result may explain the frequent occurrence of rotator cuff tears at this site.
AB - Background. We analyzed the mechanical environment of the supraspinatus tendon using a three-dimensional finite element model with the software programs MENTAT and MARC. Methods. The supraspinatus tendon that attaches to the superior facet was extracted and modeled. The geometric shape of the humeral head was determined from computed tomography images, and the shape of the supraspinatus tendon was determined from magnetic resonance images of the shoulder at 0° of abduction in a healthy 27-year-old man. The distal portion of the humeral head was fixed, and 10 N of tensile force was applied to the proximal end of the tendon. The tensile stress was calculated. Results. The tensile stress was 1.8 MPa for the bursal side and 15.0 MPa for the articular side of the anterior portion of the supraspinatus tendon. The intensity was 0 MPa for the bursal side and 4.5 MPa for the articular side of the middle portion of the tendon. The intensity was 0.1 MPa for the bursal side and 5.2 MPa for the posterior edge of the tendon. Conclusions. Based on the three-dimensional finite element method, the maximal tensile stress was observed on the articular side of the anterior edge of the supraspinatus tendon. Our result may explain the frequent occurrence of rotator cuff tears at this site.
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U2 - 10.1007/s00776-008-1240-8
DO - 10.1007/s00776-008-1240-8
M3 - Article
C2 - 18696194
AN - SCOPUS:49649095636
VL - 13
SP - 348
EP - 353
JO - Journal of Orthopaedic Science
JF - Journal of Orthopaedic Science
SN - 0949-2658
IS - 4
ER -