Does the use of a larger femoral head in total hip replacement increase the amount of wear of the plastic liner or the amount of movement of the acetabular cup?

Primary total hip replacement using a 36 mm metal on highly cross-linked polyethylene articulation. This is a surgical procedure where the femoral head is removed and replaced by a metal prosthetic femoral head (which in this situation has a diameter of 36 mm), which is attached to a femoral stem inserted into the femur. The head then articulates with a plastic (highly cross-linked polyethylene) liner in a metal acetabular shell, which is inserted into the acetabulum. The duration of the operation is between about 45 minutes and 4 hours, depending on the complexity of the operation. During the operation tiny tantalum beads are inserted into the polyethylene liner and periprosthetic bone to enable determination of polyethylene wear and acetabular component migration using a highly sophisticated radiographic technique, namely radiostereometric analysis.