| Dynamic Contact Mechanics of Radial Tears of the Lateral Meniscus: Implications for Treatment. | |
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MedLine Citation:
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PMID: 22074620 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: To characterize the effect of radial tears (RTs) of the lateral meniscus and their subsequent treatment (inside-out repair, partial meniscectomy) on joint contact mechanics during simulated gait. METHODS: Six human cadaveric knees were mounted on a simulator programmed to mimic human gait. A sensor was inserted below the lateral meniscus to measure peak joint contact pressure location, magnitude, and contact area. The following conditions were compared: intact meniscus, 30% RT (at the popliteal hiatus), 60% RT, 90% RT, repair, and partial meniscectomy. Data were analyzed in the midstance phase of gait (14% and 45%) when axial force was at its highest (2,100 N). RESULTS: Intact knees had peak contact pressures of 5.9 ± 0.9 MPa and 6.4 ± 1.1 MPa at 14% and 45% of gait, respectively. RTs of up to and including 60% had no effect on pressure magnitude or location. RTs of 90% resulted in significantly increased peak pressure (8.4 ± 1.1 MPa) in the postero-peripheral aspect of the tibial plateau and reduced contact area versus the intact knee, at 45% of gait. Repair resulted in a significant decrease in peak pressure (7.7 ± 1.0 MPa) relative to 90% RT but had no effect on contact area. Partial lateral meniscectomy resulted in areas and pressures that were not significantly different from 90% tears (8.7 ± 1.5 MPa). CONCLUSIONS: Simulated large RTs of the lateral meniscus in the region of the popliteal hiatus show unfavorable dynamic contact mechanics that are not significantly different from those resulting from a partial lateral meniscectomy. Pressure was significantly reduced with inside-out repair but was not affected by partial meniscectomy; contact area was not restored to that of the intact condition for either procedure. CLINICAL RELEVANCE: Large RTs in the region of the popliteal hiatus show unfavorable dynamic contact mechanics. |
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Authors:
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Asheesh Bedi; Natalie Kelly; Michael Baad; Alice J S Fox; Yan Ma; Russell F Warren; Suzanne A Maher |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-8 |
Journal Detail:
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Title: Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association Volume: - ISSN: 1526-3231 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8506498 Medline TA: Arthroscopy Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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MedSport, University of Michigan, Ann Arbor, Michigan, U.S.A.; Hospital for Special Surgery, New York, New York, U.S.A. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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