Ellipsoid joint (articulation ellipsoidea) (for instance, the radiocarpal or wrist joint). The articulating surfaces are segments of an ellipse: one of them is convex, oval and unequally curved in two directions; the other is which are perpendicular to each other; flexion and extencion on the frontal axis and abduction and adduction on the sagittal axis. Ligaments in ellipsoid joints are perpendicular to and at the ends of pivotal axes.Condyloid joint (articulation condylaris) (e.g. the knee joint) condyloid joint has a convex articular head in the form of a protruding rounded processMedical Coding Services will anaylse all these for the medical coding process.