This innovative prosthesis is the only “intra-osseous” prosthesis exists. A segment of distal ulnar bone is cut and two stems of prosthesis are inserted in the distal and proximal remaining segments of ulna. This type of prosthesis is indicted when the triangular fibrocartilage complex (TFCC) is intact or with minor defects. The advantage of this type of prosthesis is TFCC sparing, and simply converting to the Suve-Kapandji’s procedure. In theory, the DRUJ range of motion is transmitted to a pivot in ulnar bone near the natural joint which in turn, may influence wrist range of motion and prosthesis stability.  However, biomechanical studies confirmed the stability and preservation of the range of motion after prosthesis insertion. Short-term clinical results are promising.