Items tagged “orthopaedics”

The calcaneal inclination axis is drawn between the most inferior portion of the calcaneal tuberosity and the most distal and inferior point of the calcaneus at the calcaneocuboid joint on a weightbearing lateral foot radiograph. It can be used to draw the calcaneal inclination angle.

The mid-talar axis represents a line drawn down the longitudinal axis of the talus and can be drawn on lateral and DP radiographs.  lateral view: line should bisect the shaft of the first metatarsal DP view: line should intersect (or pass just medial to) the base of the first metatarsal I...

The calcaneal inclination angle (also known as the calcaneal pitch) is drawn on a weight-bearing lateral foot radiograph between the calcaneal inclination axis and the supporting horizontal surface. It is a measurement that reflects the height of the foot framework, but is affected by abnormal ...

The talar declination angle is drawn on the weightbearing lateral foot radiograph between the mid-talar axis and the supporting surface. It should usually measure approximately 21°. If the first metatarsal axis is steep, the mid-talar axis approaches the horizontal and is projected above the fi...

The first metatarsal axis is represented by a line drawn down the longitudinal axis of the shaft of the first metatarsal. It can be drawn on lateral and DP radiographs and is used to measure the: first metatarsal inclination angle talo-first metatarsal angle

The angle of the longitudinal arch (calcaneal–fifth metatarsal angle) is one of the angles drawn on the weight-bearing lateral foot radiograph. The angle is formed between the calcaneal inclination axis and a line drawn along the inferior edge of the 5th metatarsal: pes planus: >170° normal: ...

Midfoot equinus is an abnormality in foot alignment where there is abnormal plantarflexion of the foot in the midfoot. Related pathology Midfoot equinus occurs as a component of congenital talipes equinovarus.

A Herbert screw is an instrument used in the internal fixation of an unstable scaphoid fracture. It is a headless screw with the thread along its entire length. The two halves of the screw have a different pitch though, which causes compression of the fracture. Indications Unstable scaphoid fr...

Lateral patellar dislocation refers to lateral displacement followed by dislocation of the patella due to disruptive changes to the medial patellar retinaculum. Epidemiology Patellar dislocation accounts for ~3% of all knee injuries and is commonly seen in those individuals who participate in ...