Is calcaneal nodule angle 20 degrees normal?

summary

The joint angle of calcaneal tubercle is the angle formed between the upper edge of calcaneal tubercle (the line between calcaneal tubercle and posterior articular process of calcaneus) and calcaneal talar articular surface (the line between anterior and posterior articular process of calcaneus). The normal angle is about 30-45 degrees. It is an important sign of the relationship between heel and distance. Also called Bohler angle. Is the calcaneal nodule angle 20 degrees normal?, Today I'd like to share this with you.

Is calcaneal nodule angle 20 degrees normal?

First, calcaneus is the largest tarsal bone in the foot, which is an irregular rectangular structure composed of a thin layer of bone cortex surrounded by abundant cancellous bone.

Second, the shape of calcaneus is irregular, with six and four articular surfaces, and three articular surfaces above it, namely anterior talus, middle talus and posterior talus. The subtalar joint is composed of the three joints and the articular surface of the anterior, middle and heel of the talus. There is a wide groove between the middle and posterior subtalar joints, which is called tarsal sinus.

Third, there is a protuberance in front of the calcaneus, which is the anterior calcaneal tubercle. The divergent ligament starts from the tubercle and ends at the cuboid and scaphoid. The anterior articular surface of the calcaneus was saddle shaped and cuboid shaped.

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After calcaneal fracture, the changes of two angles can be seen on the lateral X-ray film of calcaneus. The Bohler angle of the calcaneal tubercle was 25 °~ forty °， The angle between the highest point of the posterior articular surface of the calcaneus and the highest point of the anterior tubercle of the calcaneus. Gissane angle, the angle between the line from the base of lateral sulcus of calcaneus to the highest point of anterior tubercle and the line of posterior articular surface, is 120 °~ one hundred and forty-five °。