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Journal of Bone and Joint Surgery, 1967;49:63-72.
© 1967 by The Journal of Bone and Joint Surgery, Inc

Measurement of Ligamentous Strength in Rat Knees

CHARLES M. TIPTON PH.D.1, RICHARD J. SCHILD M.S.1, and ADRIAN E. FLATT M.D.1

1 From the Exercise Physiology Laboratory, Department of Physiology and Biophysics, the Department of Physical Education, and the Department of Orthopaedic Surgery, The University of Iowa, Iowa City

Data have been presented relative to the strength and force-elongation relationships of rat ligaments. The findings indicated that the testing methods employed are sufficiently reliable for experimental purposes. Results showed that body weight, sex, and age of the animals are important parameters when evaluating separation force results. Absence of adrenal or thyroid glands had no significant influence on the strength of the medial collateral ligament. It was concluded that the strength of the medial collateral ligament was dependent upon its osseous attachment.

Force-elongation data suggested that ligamentous strength and elongation are independent properties. Ligaments from adrenalectomized and thyroidectomized rats exhibited significantly more elongation than ligaments from normal rats. The responsible mechanisms are unknown and are the focus for current studies.


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