Abstract: A power bone-cutting saw system exhibits the cutting efficiency of a circular saw, but retains the practical dimensions of an oscillating saw blade. A circular saw blade, available in a variety of diameters, is positioned at the end of a narrow, low-profile elongated support. The support houses a drive assembly that efficiently transmits power from a standard hand-held portable saw to the blade. The support can rest on modified saw guides for total joint procedures, providing the surgeon with a compact, efficient and precise bone-cutting tool. In the preferred embodiment the circular saw and support are single-use disposable units, available in a variety of lengths and widths. In an alternative embodiment, twin blades are used to eliminate changes in height between the blades and the support.