What question did this study set out to answer?

To quantify the relative contributions of the anterior, posterior, superior, and inferior acromioclavicular capsular ligaments in preventing posterior translation of the distal clavicle.

March 1, 1999Journal of Shoulder and Elbow SurgeryOpen Access

The acromioclavicular capsule as a restraint to posterior translation of the clavicle: A biomechanical analysis

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Authors

JKJohn J. KlimkiewiczAllegheny College GWGerald R. WilliamsInfectious Disease Research Institute JSJerry S. SherAllegheny College

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Implication

Biomechanical study demonstrates that superior and posterior ligaments restrain posterior clavicle translation in human cadavers, highlighting the need for capsular-sparing surgical techniques.

Key Points

To quantify the relative contributions of the anterior, posterior, superior, and inferior acromioclavicular capsular ligaments in preventing posterior translation of the distal clavicle.
Six fresh-frozen human cadaveric acromioclavicular joints (N=6) were mounted on a servohydraulic materials testing system.
Resistance to posterior displacement was measured during standardized translations along the anteroposterior axis intact and after serial sectioning of individual capsular ligaments.
Sectioning of superior and posterior capsular ligaments produced statistically significant reductions in resistance to posterior translation (P < .05), while anterior and inferior ligament sectioning produced no significant effect at the 5% level.
The superior and posterior capsular ligaments contributed 56% ± 23% and 25% ± 16% (mean ± SEM) of the total force required to achieve posterior displacement, respectively.

Cite This Study

Klimkiewicz et al. (1999) studied this question.

synapsesocial.com/papers/6aa41fdea45983801221cf53 https://doi.org/10.1016/s1058-2746(99)90003-4

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Implication

Biomechanical study demonstrates that superior and posterior ligaments restrain posterior clavicle translation in human cadavers, highlighting the need for capsular-sparing surgical techniques.

The acromioclavicular capsule as a restraint to posterior translation of the clavicle: A biomechanical analysis

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Implication

Key Points

Cite This Study

The acromioclavicular capsule as a restraint to posterior translation of the clavicle: A biomechanical analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

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