Radiographic biomechanical interpretation of foot Flashcards
Nl metatarsal protrusion distance
+/- 2mm
Cuboid abduction angle
a measure of the most lateral surface of cuboid and calcaneus, indicative of deformity in transverse plane
Talocalcaneal angle
angle of kite, measure of transverse plane anglular relationship of longitudinal bisectors of talus and calcaneus
Nl Bohler’s angle
25-40, decreases with a calcaneal fx
Talar declination angle
measurement composed of column tali axis and plane of support
1st MPJ structure and position
variants secondary to the structural anatomy of 1st MPJ, see pic for different positions
Cyma line
defined as a lazy S curve formed by the T-N and C-C joints (chopart’s joint)
Shapes of 1st met head
round: unstable, HAV flat: stable, hallux limitus Flat with ridge: very stable, hallux limitus
Nl PASA
7.5 degrees
Different Tibial sesamoid position
7 positions, nl is position 1-3
Nl Hallux IP angle
0-10
Nl metatarsus adductus angle
0-15
Bohler’s angle
defines contour of dorsal surface of calcaneus
Metatarsus primus adductus angle
also called 1st intermetatarsal angle, representation of deviation of first met relative to second met, bisect the first and bisect the second met, evaluation of hallux abducto valgus-will determine what type of procedure
nl and adductus angles of metatarsus primus adductus angle
nl: 8-12 degrees adductus: 8-10 degrees