0
Journal Contents   |    
Biomechanics of Ligament Failure II. AN ANALYSIS OF IMMOBILIZATION, EXERCISE, AND RECONDITIONING EFFECTS IN PRIMATES
FRANK R. NOYES; PETER J. TORVIK; WALTER B. HYDE; JAMES L. DELUCAS
View Disclosures and Other Information
From the Aerospace Medical Research Laboratory and the Air Force Institute of Technology, Dayton
1974 by The Journal of Bone and Joint Surgery, Incorporated
J Bone Joint Surg Am, 1974 Oct 01;56(7):1406-1418
5 Recommendations (Recommend) | 3 Comments | Saved by 3 Users Save Case

Abstract

The effects of altered levels of activity on the biomechanical properties of a ligament were investigated. After eight weeks of immobilization, anterior cruciate bone-ligament-bone preparations of wild primates tested in tension showed significant decreases in maximum failure load and energy absorbed to failure (39 per cent and 32 per cent), and an increase in ligament extensibility (compliance). These changes indicated an altered functional capacity of the ligament unit. The long-term effects of disuse were shown in a second group. After twenty weeks of resumed activity following immobilization, there was only partial recovery in ligament strength, although ligament compliance had nearly returned to normal. In a third group, a voluntary isotonic exercise of one lower limb performed by the primate during immobilization did not prevent disuse-induced changes in ligament failure properties. Ligament properties after immobilization were influenced by: (1) changes in the ligament force-elongation relationship; (2) histological changes at the bone-ligament junction; (3) altered mechanisms of specimen failure; and (4) presumed changes in the glycosaminoglycan and collagen fiber relationship.

Figures in this Article
    This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
    Sign In to Your Personal ProfileSign In To Access Full Content
    Not a Subscriber?
    Get online access for 30 days for $35
    New to JBJS?
    Sign up for a full subscription to both the print and online editions
    Register for a FREE limited account to get full access to all CME activities, to comment on public articles, or to sign up for alerts.
    Register for a FREE limited account to get full access to all CME activities
    Have a subscription to the print edition?
    Current subscribers to The Journal of Bone & Joint Surgery in either the print or quarterly DVD formats receive free online access to JBJS.org.
    Forgot your password?
    Enter your username and email address. We'll send you a reminder to the email address on record.

     
    Forgot your username or need assistance? Please contact customer service at subs@jbjs.org. If your access is provided
    by your institution, please contact you librarian or administrator for username and password information. Institutional
    administrators, to reset your institution's master username or password, please contact subs@jbjs.org

    References

    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
    CME Activities Associated with This Article
    Submit a Comment
    Please read the other comments before you post yours. Contributors must reveal any conflict of interest.
    Comments are moderated and will appear on the site at the discretion of JBJS editorial staff.

    * = Required Field
    (if multiple authors, separate names by comma)
    Example: John Doe





    Related Content
    The Journal of Bone & Joint Surgery
    JBJS Case Connector
    Related Audio and Videos
    PubMed Articles
    Guidelines
    Osteoporosis/fracture prevention clinical practice guidelines. -Kaiser Permanente Care Management Institute | 10/2/2009
    Results provided by:
    PubMed
    Clinical Trials
    Readers of This Also Read...
    JBJS Jobs
    03/19/2014
    MA - The University of Massachusetts Medical School
    11/15/2013
    LA - Ochsner Health System
    12/31/2013
    SC - Department of Orthopaedic Surgery Medical Univerity of South Carlonina
    04/16/2014
    CT - Yale University School of Medicine