title: [Os scaphoideum--functional and clinical anatomy].
abstract: 1. Scaphoid bone is the largest and clinically most significant bone in the proximal row of the carpal bones. It consists of three sections: proximal and distal pole and scaphoid waist. Extension and radial duction of the hand results in overloading of distal pole of scaphoid and its waist. 2. Nutrient arteries (from radial artery) enter the bone predominantly from the dorsal surface (75%). Functional intraosseous anastomoses do not exist. In 33% of cases proximal scaphoid has no separate nutrient arteries. 3. Scaphoid bone develops from two centres; however, two separate ossification nuclei are quite rare. Non-union of both centres during the early ontogenetic development results in os scaphoideum bipartitum congenitum.
authors.affiliation: Pracovistĕ funkcní anatomie 2. LF a FTVS UK, Praha.
authors.forename: I
authors.initials: I
authors.lastname: Dylevský
authors.forename: V
authors.initials: V
authors.lastname: Mrzena
mesh_terms: D006801:Humans; D021361:Scaphoid Bone / Q000033:anatomy & histology* / Q000502:physiology
vernacular_title: Os scaphoideum--funkcní a klinická anatomie.