Revision hip prosthesis

cemented

1.Severe varus/valgus deformity with severe flexion contractrue,and need to release bilateral accessory ligaments completely. 2.Severe and uncorrected imbalance of flection gap,and lead to cam separation in non-limited design. 3.The patient has neuromuscular disease. 4. The extensor mechanism function is damaged. 5. Severe retroflexion deformity 6. Bone tumor patients