The A/P dimension on the JOURNEY II UK femoral component changes between sizes by how many millimeters?

• A. 1 mm
• B. 2 mm
• C. 3 mm
• D. 4 mm

Answer: (B)

Sizing in knee implants uses fixed steps to keep the overall shape in proportion as you move to larger or smaller sizes. The A/P dimension is the depth of the femoral component from front to back, and it needs to scale consistently across sizes.

For the JOURNEY II UK femoral component, each size adds a constant amount to that depth: two millimeters. So the A/P dimension changes by two millimeters between consecutive sizes. This small, regular increment preserves the geometry of the anterior flange and the posterior contours, helping maintain predictable knee flexion, contact patterns with the tibial insert, and patellofemoral tracking as you select the appropriate size.