Abstract: A measured object mounting tool for producing three-dimensional shape data includes a placing part at a lower face of a cylindrical part, an inclined part at a boundary between a side face and an upper face of the cylindrical part, and a pillar part at the upper face of the cylindrical part. The pillar part has a mounting part at the upper face thereof. A three-dimensional coordinate other than the engaging portion of a model is produced by engaging the model of the dental prosthesis with the mounting part of the tool on a placing table, detecting a position where a received light amount is remarkably decreased with a laser sensor to detect a lower end of the inclined part, and thereby calculating an upper end of the engaging portion.

Abstract: To remove an undercut part from three-dimensional data of the inner face, the program includes a surface model creating means to create a surface model based on three-dimensional data of a gypsum model including an abutment tooth, a cutting direction specifying means to specify a direction of a cutting bar, and a surface model creating means to create a surface model for machining by changing the three-dimensional data to have new coordinates by determining a base axis in parallel with the cutting bar in the surface model and plane moving coordinates of the cutting bar, and converting the coordinates of a point which becomes an undercut part, to be equal to the plane moving coordinates of a point having a high height from a specified face rectangular to the base axis at the opposite side of the occlusion face and a long distance from the base axis.

Abstract: A measured object mounting tool 2 for producing a three-dimensional shape data comprises a placing part 2b at the lower face of a cylindrical part 2a, an inclined part 2c at a boundary between the side face and the upper face of the cylindrical part 2a, and a pillar part 2d at the upper face of the cylindrical part 2a, where the pillar part 2d has a mounting part 2e at the upper face thereof, a three-dimensional coordinate other than the engaging portion 3a of a model 3 is produced by engaging the model of the dental prosthesis with the mounting part 2e of the tool 2 on a placing table 1; detecting a position where a received light amount is remarkably decreased to by a laser sensor detect a lower end of the inclined part 2c; and thereby calculating an upper end of the engaging portion 3a.

Abstract: To remove an undercut part from three-dimensional data of the inner face, the program includes a surface model creating means to create a surface model based on three-dimensional data of a gypsum model including an abutment tooth, a cutting direction specifying means to specify a direction of a cutting bar, and a surface model creating means to create a surface model for machining by changing the three-dimensional data to have new coordinates by determining a base axis in parallel with the cutting bar in the surface model and plane moving coordinates of the cutting bar, and converting the coordinates of a point which becomes an undercut part, to be equal to the plane moving coordinates of a point having a high height from a specified face rectangular to the base axis at the opposite side of the occlusion face and a long distance from the base axis.

Abstract: A measured object mounting tool 2 for producing a three-dimensional shape data comprises a placing part 2b at the lower face of a cylindrical part 2a, an inclined part 2c at a boundary between the side face and the upper face of the cylindrical part 2a, and a pillar part 2d at the upper face of the cylindrical part 2a, where the pillar part 2d has a mounting part 2e at the upper face thereof, a three-dimensional coordinate other than the engaging portion 3a of a model 3 is produced by engaging the model of the dental prosthesis with the mounting part 2e of the tool 2 on a placing table 1; detecting a position where a received light amount is remarkably decreased to by a laser sensor detect a lower end of the inclined part 2c; and thereby calculating an upper end of the engaging portion 3a.

Abstract: To provide a production method of three-dimensional shape data of a part other than an engaging portion by a three-dimensional measuring device, the engaging portion has an engaging part in a cross sectional shape other than a rotary body and is projected and/or recessed on a jawbone side, a measured object mounting tool 2 comprises a cylindrical part 2a, a mounting part 2b and a placing part 2c, the mounting part 2b positions a prolonged line of an axis of the cylindrical part 2a in the engaging part 3aa, the placing part 2c aligns a pre-specified direction of the mounting part 2b with a specified providing direction of the placing table 1b, the center axis of the cylindrical part 2a is aligned with Z axis, and the model of the dental prosthesis 3 is rotated around Z axis on the basis of the specified providing direction of the placing table 1b.

Abstract: A measured object mounting tool 2 for producing a three-dimensional shape data comprises a placing part 2b at the lower face of a cylindrical part 2a, an inclined part 2c at a boundary between the side face and the upper face of the cylindrical part 2a, and a pillar part 2d at the upper face of the cylindrical part 2a, where the pillar part 2d has a mounting part 2e at the upper face thereof, a three-dimensional coordinate other than the engaging portion 3a of a model 3 is produced by engaging the model of the dental prosthesis with the mounting part 2e of the tool 2 on a placing table 1; detecting a position where a received light amount is remarkably decreased to by a laser sensor detect a lower end of the inclined part 2c; and thereby calculating an upper end of the engaging portion 3a.

Abstract: To provide a production method of three-dimensional shape data of a part other than an engaging portion by a three-dimensional measuring device, the engaging portion has an engaging part in a cross sectional shape other than a rotary body and is projected and/or recessed on a jawbone side, a measured object mounting tool 2 comprises a cylindrical part 2a, a mounting part 2b and a placing part 2c, the mounting part 2b positions a prolonged line of an axis of the cylindrical part 2a in the engaging part 3aa, the placing part 2c aligns a pre-specified direction of the mounting part 2b with a specified providing direction of the placing table 1b, the center axis of the cylindrical part 2a is aligned with Z axis, and the model of the dental prosthesis 3 is rotated around Z axis on the basis of the specified providing direction of the placing table 1b.

Abstract: A dental automatic cutting apparatus is disclosed, having a construction in which cutting tools are made automatically detachable to a chuck and a tool cassette by automatic control mechanism comprising: an engagement means provided to the tool cassette and a base block to maintain the tool cassette in a detachable manner to the base block to a desired position relation, the tool cassette provided on its front surface side with at least two post-inserting bore through which each tool post having a function to accommodate and hold the cutting tool which can be inserted, and the base block is fixed to a main body of the dental automatic cutting apparatus, and connection means for connecting the engagement means provided in the tool cassette to the base block to fix the tool cassette.