| Mechanical properties of the anterior cruciate ligament chronically relaxed by elevation of the tibial insertion. | |
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MedLine Citation:
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PMID: 8618159 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of stress deprivation on the mechanical properties of the anterior cruciate ligament were studied in a canine model. Fifty-eight mature mongrel dogs were divided into two groups. In the relaxed group (n = 30), the tibial insertion of the anterior cruciate ligament in each right knee was surgically elevated proximally 3 mm from the tibia; the elevation was anatomically reduced in the sham group (n = 28). In order to obtain control data, the left knee in each dog was left untreated. A femur-anterior cruciate ligament-tibia complex was excised from each knee for biomechanical tests at 6 or 12 weeks after surgery. To simplify data analysis, the treat/nontreat ratio (the ratio of the data obtained from the treated knee to that from the nontreated knee) was used. The cross-sectional area of the ligament increased significantly in both groups; the area in the relaxed group (average treat/nontreat ratio = 1.37) was significantly larger than that in the sham group (1.16) at 6 weeks but not at 12 weeks. The treat/nontreat ratio of tensile strength in the relaxed group significantly decreased to 0.67 and 0.58 at 6 and 12 weeks, respectively; in the sham group, it significantly decreased to 0.79 at 6 weeks but subsequently increased to 0.87 at 12 weeks. Only at 12 weeks was a significant difference observed between the two groups. This study demonstrated that, in the anterior cruciate ligament, stress deprivation results in a rapid increase in the cross-sectional area, although this effect disappears by 12 weeks, and in a decrease in mechanical strength, although a relatively long period of more than 6 weeks is required for the deterioration. |
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Authors:
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M Keira; K Yasuda; K Kaneda; N Yamamoto; K Hayashi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of orthopaedic research : official publication of the Orthopaedic Research Society Volume: 14 ISSN: 0736-0266 ISO Abbreviation: J. Orthop. Res. Publication Date: 1996 Jan |
Date Detail:
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Created Date: 1996-06-12 Completed Date: 1996-06-12 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8404726 Medline TA: J Orthop Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 157-66 Citation Subset: IM |
Affiliation:
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Department of Orthopaedic Surgery, Hokkaido University School of Medicine, Sapporo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Anterior Cruciate Ligament / physiology* Biomechanics Collagen / physiology Dogs Equipment Design Tibia / physiology* Time Factors |
| Chemical | |
Reg. No./Substance:
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9007-34-5/Collagen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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