Coronal plane alignment of the knee phenotypes and ankle joint coronal plane alignment patterns in Egyptian population

Figure 1 Radiological assessment and classification details. A: Long-leg, standing anteroposterior (hip to knee to ankle radiograph showing how mechanical lateral distal femoral angle, medial proximal tibial angle, and tibial plafond horizontal angle were measured; B: Schematic representation of the coronal plane alignment of the knee classification following MacDessi et al[5] description; C: Ankle joint line orientation directions and types. mLDFA: Mechanical lateral distal femoral angle; MPTA: Medial proximal tibial angle; TPHA: Tibial plateau horizontal angle; aHKA: Arithmetic hip, knee, and ankle; AJLO: Ankle joint line orientation.

Figure 2 Scatterplot of knee joint line orientation against arithmetic hip, knee, and ankle (aHKA) showing distribution by percentage of the nine coronal plane alignment of the knee phenotypes. aHKA: Arithmetic hip, knee, and ankle; mLDFA: Mechanical lateral distal femoral angle; MPTA: Medial proximal tibial angle.

Figure 3 A bar chart showing the distribution of coronal plane alignment of the knee subtypes (ankle joint line orientation types against each coronal plane alignment of the knee type). CPAK: Coronal plane alignment of the knee; AJLO: Ankle joint line orientation; TPHA: Tibial plateau horizontal angle.

Figure 4 Correlation analysis between tibial plateau horizontal angle, representing the ankle joint line orientation. A: The arithmetic hip, knee, and ankle; B: The knee joint line orientation. aHKA: Arithmetic hip, knee, and ankle; JLO: Joint line obliquity; TPHA: Tibial plateau horizontal angle.