What is the inclination angle of a size 5 Apex Stem?

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Multiple Choice

What is the inclination angle of a size 5 Apex Stem?

Explanation:
The inclination angle is how the stem sits within the femoral canal in the frontal view—the angle between the stem’s long axis and the femoral shaft axis. For the Apex stem family, the proximal geometry is fixed for each size to match typical femoral anatomy. In size 5, that fixed design specifies an inclination of 132.5 degrees. This value is chosen to align the implant with the natural orientation of the proximal femur, supporting proper leg length, offset, and load transfer. Deviating from this angle can lead to suboptimal alignment, impingement, or uneven load distribution, which is why 132.5 degrees is the correct specification for this size.

The inclination angle is how the stem sits within the femoral canal in the frontal view—the angle between the stem’s long axis and the femoral shaft axis. For the Apex stem family, the proximal geometry is fixed for each size to match typical femoral anatomy. In size 5, that fixed design specifies an inclination of 132.5 degrees. This value is chosen to align the implant with the natural orientation of the proximal femur, supporting proper leg length, offset, and load transfer. Deviating from this angle can lead to suboptimal alignment, impingement, or uneven load distribution, which is why 132.5 degrees is the correct specification for this size.

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