Radiographic and Functional Results following Subtalar Arthroereisis in Pediatric Flexible Flatfoot

Figure 1

The graphical representation of angles measures used in the study. A: DP talocalcaneal angle. B: talonavicular coverage angle. Points a and b = medial and lateral edges (resp.) of the articular surface of the talus bone. Points c and d = medial and lateral edges (resp.) of the articular surface of the navicular bone. Line A is perpendicular to ab, and line B is perpendicular to cd. Talonavicular coverage is the angle created by the intersection of lines A and B. C: talocalcaneal angle in lateral radiography. D: Moreau-Costa-Bartani angle. E: naviculocuboid overlap. Points a and b = superior and inferior margins (resp.) of the cuboids. Point c = inferior margin of the navicular. Naviculocuboid overlap = ac/ab X 100.