Surgical guide preparation tool and method for preparing surgical guide

A method for preparing a surgical guide comprising:

• a step of preparing a gauge body having a pair of marker members, wherein each of the marker members is provided with plural marks which are recognizable by a CT scanned image and disposed longitudinally and laterally at substantially regular intervals;
• a step of installing the gauge body at a position of the surgical guide body that corresponds to a deficient tooth, capturing a CT scanned image obtained in such a state that the surgical guide body is installed on the teeth into a computer, and reading the positions of marks of respective marker members corresponding to the insertion direction of the implant by analysis with computer operation;
• a step of inserting a positioner into the internal side of the guide ring, inserting the guide ring into the internal side of the gauge body, and inserting a pin in such a direction connecting the axis of the positioner and the positions of the marks of respective marker members from which the insertion direction of the implant has been read;
• and
• a step of fixing the guide ring to the surgical guide body at such a position where the pin is inserted, and then removing the pin, positioner and gauge body.