The Lawrence and Bot classification divides fifth metatarsal fractures into three zones: Zone 1 (Pseudo-Jones) involves the tuberosity with high union rates; Zone 2 (Jones Fracture) occurs at the metaphyseal-diaphyseal junction, a watershed area with limited vascularity and highest nonunion risk; Zone 3 involves the proximal diaphysis.
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Fifth Metatarsal Fractures #frcsorth #drhiteshgopalanAdded:
Let's discuss the Lawrence and Bot classification of fifth metatarsal base fractures. Zone one represents the tuberosity, also called the pseudo Jones fracture.
Zone two, or Jones fracture, the watershed or avascular area at the metaphysis diaphyseal junction.
Fractures occurring in zone two have the greatest risk for delayed healing due to limited vascularity of the site.
And zone three represents the proximal diaphysis.
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