Scaphoid Non-Union and AVN - Simon Richards 20/3/2001
BACKGROUND
Commonest carpal bone # (50-60%). Mainly men aged 15 - 30 yrs
Union rate is 90 - 95% . Intra-articular bone (almost completely covered in hyaline cartiladge)
Distal pole 30%, waist 60%, proximal pole 10%.
Scaphoid non-union = # that fails to show a progression of # healing on three separate monthly examinations after a treatment period of 6/12
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Authors
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Gelberman, Panagis et al
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Title
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The arterial anatomy of the human carpus. Part 1: The extraosseous Vascularity
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Reference
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The Journal of Hand Surgery. July 1983 Vol. 8, No. 4, 367 - 375
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Summary
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25 fresh cadavers. Arterial supply identified by injection of dye and subsequent chemical debridement. Most carpal bones receive blood from nutrient arteries Off 3 dorsal and 3 palmer transverse arches. The scaphoid receives it's supply from branches direct off the radial artey.
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Critique
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Impressive method of visualising these tiny structures. First detailed report of blood supply to carpus
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Authors
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Gelberman, Menon et al
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Title
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The Vascularity of the Scaphoid
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Reference
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The Journal of Hand Surgery. July 1980 Vol. 5, 508-513
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Summary
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25 fresh cadaversAs above. Found Scaphoid (and Capitate, 20% of Lunates ) to have large areas of the bone supplied by a single intraossous vessel. Therefore high AVN
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Critique
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Impressive method of visualising these tiny structures. First detailed report of blood supply to carpus
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