Data Trace Editor – See: – Radiographic Evaluation of Cemented Femoral Components: – Exam for THR Loosening: – Discussion: – failure to remove soft cancellous bone from medial surface of femoral neck, so column of cement does not rest on dense cancellous or cortical bone & … Read more
– Discussion: – over the course of several hours, half or more of the dose accumulates in bone, and the remainder is excreted in urine; – images obtained over 2-4 hours (half life of technetium is 6 hours); – increased uptake in immature bone and metabolically active bone, or … Read more
– Technique: – preoperative considerations; – goal is to separate the nail atraumatically from the bed and the proximal nail fold; – insert freer elevator or fine nosed hemostat under the edge of the nail plate and push proximal; – a plane of cleavage … Read more
– Tarsal Tunnel Syndrome: – compression syndrome of the tibial nerve in the tarsal tunnel; – tarsal tunnel is formed by the flexor retinaculum behind and distal to the medial malleolus; – inciting causes: – lipoma, ganglia, or neoplasms within the tarsal tunnel; – an accessory flexor digitorum longus muscle is a common cause; – … Read more
(see also: Accessory Navicular; Kohler’s Disease I) Anatomy navicular joins in front w/ medial, intermediate, & lateral cuneiform bones, which articulate anteriorly w/ first, second, and third metatarsals; navicular provides insertion for tibialis posterior; blood supply to the navicular bone is radial and extraarticular & is subject to loss both at time of injury & … Read more
– See: – Talocalcaneal Coalition – Calcaneonavicular Coalition – Discussion: – coalition between tarsal bones is frequent cause of painful flatfoot (pes planus) in the older child or adolescent; – tarsal coalition may be osseous, cartilaginous, or fibrous. – calcaneonavicular coalition bar is most common, followed by middle facet of talocalcaneal coalition joint; – single … Read more
– See: Radiographs of the Ankle – Discussion: – tibiotalar articular surface usually has slight lateral tilt, avg 3 deg; – empirical axis is in sl varus position, as indicated by talocrural ang; – Mortise View: – talocrual anlge is formed by: – line drawn parallel to … Read more
– See: Tarsal Coalition – Discussion: – talocalcaneal coalitions are characteristically on medial side of sub-talar joint; – coalition tends to ossify between 12 and 15 years; – although coalition between calcaneus & talus may occur in any of three facets, middle facet is most commonly involved; … Read more
– Discussion: – congenital clubfoot is a structural foot deformity that is present at birth; – there is in utero malalignment of the talocalcaneal, talonavicular and calcaneocuboid joints; – articular malalignments are fixed by contracted joint capsules, ligaments, and contracted foot and ankle tendons; – may be … Read more
– Discussion: – talar instability is assessed w/ talar tilt test, in which angle formed by tibial plafond & talar dome is measured as inversion force is applied to hindfoot; – talar tilt test is useful for evaluation of a combined injury of both the anterior talofibular and the calcaneofibular ligaments. – isolated rupture of the … Read more