Capsular properties of the shoulder.

E. Itoi, J. J. Grabowski, B. F. Morrey, K. N. An

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The purpose of this study was to determine the structural properties of the capsule of the glenohumeral joint. Twelve fresh frozen cadaveric shoulders were studied. Capsular strips were prepared from four different sites (anterior, posterior, superior, and inferior) of the capsule. One end of the capsular sections was left attached to the humerus, and the other excised was fixed in a clamp of an Instron universal testing machine. Maximum load, strength (maximum stress), and modulus of elasticity of these four capsular portions were measured. The most common mode of failure was tear at the midsubstance (68%), followed by tear at the clamp-capsule junction (23%), and detachment from the humerus (9%). The posterior capsule (1.0 +/- 0.4 mm) was thinner than the anterior (1.8 +/- 0.3 mm), superior (1.6 +/- 0.4 mm), and inferior capsule (1.5 +/- 0.3 mm). Among the four portions of the capsule, the posterior capsule showed the greatest strength (216.6 +/- 58.2 kg/cm2) and modulus of elasticity (683.1 +/- 228.8 kg/cm2), whereas the superior capsule showed the least strength (82.4 +/- 33.5 kg/cm2). There were no significant differences in maximum load. The greater strength of the posterior capsule may be one explanation for the low incidence of posterior shoulder dislocation.

Original languageEnglish (US)
Pages (from-to)203-210
Number of pages8
JournalTohoku Journal of Experimental Medicine
Volume171
Issue number3
StatePublished - Nov 1993

Fingerprint

Capsules
Elastic Modulus
Humerus
Clamping devices
Tears
Elastic moduli
Shoulder Dislocation
Bursitis
Shoulder Joint
Structural properties
Loads (forces)
Incidence
Testing

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Itoi, E., Grabowski, J. J., Morrey, B. F., & An, K. N. (1993). Capsular properties of the shoulder. Tohoku Journal of Experimental Medicine, 171(3), 203-210.

Capsular properties of the shoulder. / Itoi, E.; Grabowski, J. J.; Morrey, B. F.; An, K. N.

In: Tohoku Journal of Experimental Medicine, Vol. 171, No. 3, 11.1993, p. 203-210.

Research output: Contribution to journalArticle

Itoi, E, Grabowski, JJ, Morrey, BF & An, KN 1993, 'Capsular properties of the shoulder.', Tohoku Journal of Experimental Medicine, vol. 171, no. 3, pp. 203-210.
Itoi E, Grabowski JJ, Morrey BF, An KN. Capsular properties of the shoulder. Tohoku Journal of Experimental Medicine. 1993 Nov;171(3):203-210.
Itoi, E. ; Grabowski, J. J. ; Morrey, B. F. ; An, K. N. / Capsular properties of the shoulder. In: Tohoku Journal of Experimental Medicine. 1993 ; Vol. 171, No. 3. pp. 203-210.
@article{fac743671b7e4a3ba8612a91fdd14e23,
title = "Capsular properties of the shoulder.",
abstract = "The purpose of this study was to determine the structural properties of the capsule of the glenohumeral joint. Twelve fresh frozen cadaveric shoulders were studied. Capsular strips were prepared from four different sites (anterior, posterior, superior, and inferior) of the capsule. One end of the capsular sections was left attached to the humerus, and the other excised was fixed in a clamp of an Instron universal testing machine. Maximum load, strength (maximum stress), and modulus of elasticity of these four capsular portions were measured. The most common mode of failure was tear at the midsubstance (68{\%}), followed by tear at the clamp-capsule junction (23{\%}), and detachment from the humerus (9{\%}). The posterior capsule (1.0 +/- 0.4 mm) was thinner than the anterior (1.8 +/- 0.3 mm), superior (1.6 +/- 0.4 mm), and inferior capsule (1.5 +/- 0.3 mm). Among the four portions of the capsule, the posterior capsule showed the greatest strength (216.6 +/- 58.2 kg/cm2) and modulus of elasticity (683.1 +/- 228.8 kg/cm2), whereas the superior capsule showed the least strength (82.4 +/- 33.5 kg/cm2). There were no significant differences in maximum load. The greater strength of the posterior capsule may be one explanation for the low incidence of posterior shoulder dislocation.",
author = "E. Itoi and Grabowski, {J. J.} and Morrey, {B. F.} and An, {K. N.}",
year = "1993",
month = "11",
language = "English (US)",
volume = "171",
pages = "203--210",
journal = "Tohoku Journal of Experimental Medicine",
issn = "0040-8727",
publisher = "Tohoku University Medical Press",
number = "3",

}

TY - JOUR

T1 - Capsular properties of the shoulder.

AU - Itoi, E.

AU - Grabowski, J. J.

AU - Morrey, B. F.

AU - An, K. N.

PY - 1993/11

Y1 - 1993/11

N2 - The purpose of this study was to determine the structural properties of the capsule of the glenohumeral joint. Twelve fresh frozen cadaveric shoulders were studied. Capsular strips were prepared from four different sites (anterior, posterior, superior, and inferior) of the capsule. One end of the capsular sections was left attached to the humerus, and the other excised was fixed in a clamp of an Instron universal testing machine. Maximum load, strength (maximum stress), and modulus of elasticity of these four capsular portions were measured. The most common mode of failure was tear at the midsubstance (68%), followed by tear at the clamp-capsule junction (23%), and detachment from the humerus (9%). The posterior capsule (1.0 +/- 0.4 mm) was thinner than the anterior (1.8 +/- 0.3 mm), superior (1.6 +/- 0.4 mm), and inferior capsule (1.5 +/- 0.3 mm). Among the four portions of the capsule, the posterior capsule showed the greatest strength (216.6 +/- 58.2 kg/cm2) and modulus of elasticity (683.1 +/- 228.8 kg/cm2), whereas the superior capsule showed the least strength (82.4 +/- 33.5 kg/cm2). There were no significant differences in maximum load. The greater strength of the posterior capsule may be one explanation for the low incidence of posterior shoulder dislocation.

AB - The purpose of this study was to determine the structural properties of the capsule of the glenohumeral joint. Twelve fresh frozen cadaveric shoulders were studied. Capsular strips were prepared from four different sites (anterior, posterior, superior, and inferior) of the capsule. One end of the capsular sections was left attached to the humerus, and the other excised was fixed in a clamp of an Instron universal testing machine. Maximum load, strength (maximum stress), and modulus of elasticity of these four capsular portions were measured. The most common mode of failure was tear at the midsubstance (68%), followed by tear at the clamp-capsule junction (23%), and detachment from the humerus (9%). The posterior capsule (1.0 +/- 0.4 mm) was thinner than the anterior (1.8 +/- 0.3 mm), superior (1.6 +/- 0.4 mm), and inferior capsule (1.5 +/- 0.3 mm). Among the four portions of the capsule, the posterior capsule showed the greatest strength (216.6 +/- 58.2 kg/cm2) and modulus of elasticity (683.1 +/- 228.8 kg/cm2), whereas the superior capsule showed the least strength (82.4 +/- 33.5 kg/cm2). There were no significant differences in maximum load. The greater strength of the posterior capsule may be one explanation for the low incidence of posterior shoulder dislocation.

UR - http://www.scopus.com/inward/record.url?scp=0027700256&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027700256&partnerID=8YFLogxK

M3 - Article

VL - 171

SP - 203

EP - 210

JO - Tohoku Journal of Experimental Medicine

JF - Tohoku Journal of Experimental Medicine

SN - 0040-8727

IS - 3

ER -