Which neck angle is associated with Valgus orientation in Polarstem?

Which neck angle is associated with Valgus orientation in Polarstem?

• A. Valgus 145
• B. Standard 135
• C. Lateral 126
• D. Valgus 150

Answer: (A)

Neck angle controls how the prosthetic neck sits relative to the femoral shaft, and valgus orientation means the neck–shaft angle is larger than the neutral setting, tilting the head laterally. In Polarstem, the valgus configuration is at 145 degrees, so that angle best matches the required valgus orientation. The neutral option is 135 degrees, which is not valgus, and 126 is a more varus/ lateral tilt. A higher value like 150 is another valgus setting but not the one described as the valgus orientation here.

Neck angle controls how the prosthetic neck sits relative to the femoral shaft, and valgus orientation means the neck–shaft angle is larger than the neutral setting, tilting the head laterally. In Polarstem, the valgus configuration is at 145 degrees, so that angle best matches the required valgus orientation. The neutral option is 135 degrees, which is not valgus, and 126 is a more varus/ lateral tilt. A higher value like 150 is another valgus setting but not the one described as the valgus orientation here.