Journal article
Contact Stress Distributions in Malreduced Intraarticular Distal Radius Fractures
Journal of orthopaedic trauma, Vol.10(5), pp.331-337
07/1996
DOI: 10.1097/00005131-199607000-00007
PMID: 8814574
Abstract
SUMMARYResidual articular incongruity of the distal radius following intraarticular fracture has been correlated with early osteoarthritis (OA) and a poor clinical outcome. We developed a simple in vitro fracture model of the distal radius to investigate the relationship between degree of articular incongruity and the resulting distribution of radiocarpal contact stress. Twelve fresh-frozen cadaver arms were dissected, packets of Fuji Pressensor film were inserted into the wrist, and the wrist was loaded through its flexor and extensor tendons. We created a simple intraarticular fracture that allowed controlled distal radius articular incongruity. Loading trials were performed for the intact distal radius, for a fully reduced case, and for step-offs of 0.4, 1, 2, and 3 mm. Mean contact stress was significantly greater than the anatomically reduced case at only 3 mm of step-off. Contact area was greater than the anatomically reduced case at 0.4, 1, and 2 mm of step-off. The elevations in contact stress that we observed were only modest, suggesting that other factors may be involved in the pathogenesis of radiocarpal OA in the presence of residual articular incongruity.
Details
- Title: Subtitle
- Contact Stress Distributions in Malreduced Intraarticular Distal Radius Fractures
- Creators
- Donald Anderson - Biomechanics Research Laboratory, Allegheny-Singer Research Institute, and Division of Upper Extremity Surgery, Allegheny General Hospital, Pittsburgh, Pennsylvania, U.S.AAlexander BellMichael GaffneyJoseph Imbriglia
- Resource Type
- Journal article
- Publication Details
- Journal of orthopaedic trauma, Vol.10(5), pp.331-337
- Publisher
- Lippincott-Raven Publishers
- DOI
- 10.1097/00005131-199607000-00007
- PMID
- 8814574
- ISSN
- 0890-5339
- eISSN
- 1531-2291
- Language
- English
- Date published
- 07/1996
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Industrial and Systems Engineering
- Record Identifier
- 9984040006202771
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