What does the Angle of Gissane indicate when it exceeds 130°?

What does the Angle of Gissane indicate when it exceeds 130°?

• A. Fracture of the metatarsals
• B. Fracture of the posterior subtalar joint surface
• C. Rupture of the Achilles tendon
• D. Dislocated ankle joint

Answer: (B)

The Angle of Gissane is a critical measurement taken from the lateral view of the calcaneus and is formed by the intersection of two lines: one line drawn from the anterior process of the calcaneus to the highest point of the posterior facet, and the other running from the highest point of the posterior facet to the lateral aspect of the calcaneus. The normal range for this angle is typically between 120° and 130°. When the Angle of Gissane exceeds 130°, it is indicative of a fracture of the posterior subtalar joint surface. This is significant because an increased angle suggests that there may be structural deformity due to an underlying injury. Specifically, a higher angle often correlates with injuries that compromise the stability of the subtalar joint, which can result from trauma, such as an injury leading to a fracture in the region. Understanding the implications of the Angle of Gissane is vital for diagnosing and managing calcaneal injuries, as alterations in this angle can have implications for the alignment and function of the foot.

The Angle of Gissane is a critical measurement taken from the lateral view of the calcaneus and is formed by the intersection of two lines: one line drawn from the anterior process of the calcaneus to the highest point of the posterior facet, and the other running from the highest point of the posterior facet to the lateral aspect of the calcaneus. The normal range for this angle is typically between 120° and 130°.

When the Angle of Gissane exceeds 130°, it is indicative of a fracture of the posterior subtalar joint surface. This is significant because an increased angle suggests that there may be structural deformity due to an underlying injury. Specifically, a higher angle often correlates with injuries that compromise the stability of the subtalar joint, which can result from trauma, such as an injury leading to a fracture in the region.

Understanding the implications of the Angle of Gissane is vital for diagnosing and managing calcaneal injuries, as alterations in this angle can have implications for the alignment and function of the foot.