What is Gissane angle?
The Gissane (crucial) angle is formed by two strong cortical struts extending laterally, one along the lateral margin of the posterior facet and the other extending anterior to the beak of the calcaneus.
How do you find the angle of Gissane?
The Gissane angle is measured by drawing lines along the superior surfaces of the anterior process and the posterior facet of the calcaneus to meet at the calcaneal sulcus 1.
What is Bohler’s angle?
The Böhler angle is the angle on a lateral foot radiograph between a line joining the highest point of the anterior process of the calcaneus and the highest point of the posterior articular facet, and a line joining the highest point of the posterior articular facet with the highest point of the calcaneal tuberosity 1.
What is Bohler’s angle used for?
Bohler’s angle and the crucial angle of Gissane are commonly assessed when evaluating patients with calcaneal fractures. Traumatic alteration of these angles can be used as a measure of fracture severity, with one goal of surgical management being restoration of these angles to normal values.
How is calcaneal pitch measured?
Measurement
- The calcaneal inclination axis, extending from the calcaneus by the inferior portion of the calcaneocuboid joint to the inferior border of the calcaneus.
- Tangential to the inferior distal border of the calcaneus.
Where is the calcaneal tuberosity?
On the lateral side is commonly a tubercle called the calcaneal tubercle (or trochlear process). This is a raised projection located between the tendons of the peroneus longus and brevis. It separates the two oblique grooves of the lateral surface of the calcaneus (for the tendons of the peroneal muscles).
Why is it called Lover’s fracture?
The name “lover’s fracture” is derived from the fact that a suitor may jump from great heights while trying to escape from the lover’s spouse 2. There is an important association between lover’s fractures and burst fractures of the lumbar spine.
How do you calculate Böhler’s angle?
Böhler’s angle can be measured with the use of two intersecting lines: one drawn from anterior process of the calcaneus to the highest part of posterior articular surface and a second drawn from the same point of posterior articular surface to the most superior point of tuberosity.
What is a normal calcaneal inclination angle?
Median calcaneal inclination angles have been published in various adult populations ranging between 18° +/- 5° 5 and 20.5° +/- 1° 6 with a large range (8-30°) of normal in one series 5. Normal ranges of between 10-25° 3 and 20-30° 2 have been proposed.
What is the heel called?
In humans the heel consists of the calcaneus (largest of the tarsal bones), cushioned below by a bursal sac, fat pad, and thickened skin. The calcaneus is roughly rectangular, articulating above with the talus bone of the ankle joint and in front with the cuboid, another tarsal bone.
What is a calcaneal tuberosity?
What is a Gissane angle?
Gissane angle, also known as the ” critical angle “, is an angular measurement made directly inferior to the lateral process of the talus . It is formed by the downward and upward slopes of the calcaneal superior surface. It is better seen on a lateral plain film of the calcaneus and hindfoot. Its normal value is usually between 120° and 145°.
What is a critical angle in geology?
Gissane angle, also known as the ” critical angle “, is an angular measurement made directly inferior to the lateral process of the talus . It is formed by the downward and upward slopes of the calcaneal superior surface. It is better seen on a lateral plain film of the calcaneus and hindfoot.
What was the original description of the Gissane radiograph?
The original description by Gissane is difficult to locate. Most of the literature reports on his presentation to the British Orthopaedic Association in 1946, without defining original radiographs. Discrepancy between the normal angles of 105-135°; 120-145°; and 130-145°
Is Boehler’s angle of Gissane useful in diagnosing calcaneus fractures?
2006 – Knight et al found that although the Boehler’s angle is somewhat helpful, the critical angle of Gissane is not useful in diagnosing calcaneus fractures in the ED. Interrater reliability for Boehler’s angle was excellent, but for the critical angle of Gissane, very poor.