TABLE 1.

Deformity type	Abnormal angles	Scheme
Varus tibial deformity-congruent joint	Decreased LDTA, CORA at the level of tibial articular surface, normal tibial-talar angle
Valgus tibial deformity-congruent joint	Increased LDTA, CORA at the level of tibial articular surface, normal tibial-talar angle
Varus tibial deformity-incongruent joint	Decreased LDTA, CORA at the level of tibial articular surface, tibial-talar angle
Valgus tibial deform ity-incongruent joint	Increased LDTA, CORA at the level of tibial articular surface, tibial-talar angle
Incongruent joint	Normal LDTA, tibial-talar angle > 10°