An implant insertion device is adapted for use with a shape memory implant. The single-stage planetary gear unit is provided with a planetary gear disk firmly sleeved onto the shaft, a plurality of planetary gears pivoted onto the planetary gear disk, an internal ring gear meshed with the planetary gear, and a sun gear fixed onto the rotor and meshed with the planetary gear. Channel movement is controlled by a clamp screw acting in conjunction with spring means urging the channels apart. Cluster analysis is performed on the color data points to determine which existing cluster will receive a new point or if a new cluster should be created.