Table 1.

Indications to VVC implants in primary TKA. ROM: range of motion; MCL: medial collateral ligament

Indications to VVC in primary TKA
Valgus deformity with incompetent MCL (25)
Bone defects (17)
Severe flexion contracture with inability to balance the knee (24)
Varus-valgus laxity > 5mm throughout the whole ROM (31)
Extra-articular deformity (11)
Incontrollable flexion-extension imbalance (17)
Rheumatoid arthritis (which usually leads to valgus deformity with an incompetent MCL) (17)
Sequelae of poliomyelitis (16)
Neuropathic arthropathy (22)