a cutting tool is provided with an arcuate cutting blade that preferably engages a guide tool to create a curved resected surface during an arthorplasty procedure . in one embodiment , a depth of the cutting blade is sufficient to permit the simultaneous creation of resected surfaces on two bones that articulate , such as both the femor and the tibia for a given condyle , without the need to reposition the guide or the leg . in another embodiment , a cutting member has a generally rectangular cross - section along a longitudinal axis with a first and second surface having cutting teeth defined thereon and a third and fourth surface adapted to interface with a cutting guide positioned proximate the bone . in this embodiment , the cutting tool can resect the bone in two different directions without reorienting the cutting member .