<p>D1 and D3, the mediolateral (ML) diameters of condyles; D2 and D4, the anteroposterior (AP) diameters of condyles; Ds, the sagittal difference between the geometric centers of condyles on two sides; C1 and C2, the distances between the center of condyles and the MSP; A1 and A2, the angles between the ML axis of condyles and the MSP.</p