Improved method for removing large amount of bone and articulate surface including cartilage comprising a bone chipper, which can be adapted for usage with any large articular surface or bony structure through a small incision using minimally invasive surgical approach. The inventive device includes an oscillating chipper tip having a series of metallic blades with sharp cutting edges vertically situated and attached to a metallic circular platform. Said platform is situated at the distal end of shank blade. The circular platform and cutting blade will oscillate horizontally driven by the reciprocating eccentric cam with his attached proximally to a reciprocating central shaft. Each of the vertical blades has two sharp vertical cutting edges. The blade shank contains a suction channel, which allows of the removal of bone particles and tissue debris generated by the cutting process. The electromagnetic driver comprises three or four electromagnetic coils placed in a collinear fashion and in series. The coils being separated by magnetic Neodymium wafers firmly attached to the reciprocating central shaft which actually move back and forth driven by the electromagnetic coils as they receive alternating current from a frequency modulator external power supply unit. A railing in the form of an inverted T located at the bottom of the electromagnet driver and used to guide the movement of the driver when said guide slides into corresponding T grooves located on the femoral and tibial templates which are positioned adjacent to the tibial and femoral bones and firmly secured by two or more large guide wires inserted through the templates and into the bone.
