Document Detail


Contact pressure comparison of proud osteochondral autograft plugs versus proud synthetic plugs.
MedLine Citation:
PMID:  21323295     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Osteochondral autograft transfer is an accepted treatment for chondral and osteochondral defects of the knee. Synthetic plugs may eventually be used for primary treatment of defects. Currently they are largely used for osteochondral donor site backfill. Placement of osteochondral or synthetic plugs proud leads to articulating surface incongruity, increases in contact pressure, and potential for both plug and opposing surface degenerative change.We conducted a biomechanical study of human cadaver knees to determine whether differences exist in the contact pressure of osteochondral autograft plugs placed proud versus synthetic plugs placed proud. Ten human cadaveric knees were used (20 condyles). Contact pressure was measured with Tekscan sensor technology (South Boston, Massachusetts) with both static and cyclical loads (of 250 and 500 cycles) created by an MTS Bionix system (Eden Prairie, Minnesota) under the following conditions: native articular cartilage, surgically created defect (7-mm diameter), 1-mm proud osteochondral autograft, and 1-mm proud synthetic graft. Proud osteochondral autograft plugs resulted in a 21.4% increase in peak contact pressure over surrounding native articular cartilage versus a 4.9% increase with proud synthetic plugs. Synthetic plugs compressed their structure and subsided versus subchondral bone collapse with compressive load in osteochondral autograft plugs. Proud osteochondral autograft plugs have significantly higher peak contact pressures than proud synthetic plugs when placed for treatment of chondral and osteochondral defects in the knee.
Authors:
Joshua D Harris; Kraig K Solak; Robert A Siston; Alan Litsky; Jason Richards; David C Flanigan
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Publication Detail:
Type:  Journal Article     Date:  2011-01-01
Journal Detail:
Title:  Orthopedics     Volume:  34     ISSN:  1938-2367     ISO Abbreviation:  Orthopedics     Publication Date:  2011  
Date Detail:
Created Date:  2011-02-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7806107     Medline TA:  Orthopedics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  -     Citation Subset:  IM    
Copyright Information:
Copyright 2011, SLACK Incorporated.
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