Is rotational alignment of the tibial component in total knee arthroplasty better at the medial third of tibial tuberosity than at the medial border?
Using fixed bone landmarks for rotational alignment leads to a notable variance between femoral and tibial components. Referencing the tibial rotation on a line from the medial third of the tibial tubercle to the center of the tibial tray resulted in a better femoro-tibial rotational alignment than using the medial border of tibial tubercle as a landmark. Surgeons using fixed bearings with a high rotational constraint between the inlay and the femoral component should be aware of this effect to avoid premature polyethylene wear.
The PCAMT is considered to have the potential of being a useful instrument for identifying referred children whose mothers may not attend for treatment and possibly for identifying those mothers who would benefit most from concentrating on attending and observation skills in child management training.