Holding attachment for denture abutment

A holding attachment for a denture abutment which holds a material of the denture abutment before cutting, the material including a round or substantially round columnar held portion in which a position reference portion is provided in one rotation position and a cut portion with a round or substantially round columnar shape coaxial or substantially coaxial with the held portion, the holding attachment comprising:

• a holding portion with a round or substantially round columnar hole shape in which the held portion of the material before cutting is inserted;
• and
• a mounting portion that is mounted on a work mount of a cutting machine;
• wherein
• the mounting portion includes:
• at least one pin that is inserted in at least one pin insertion hole in the work mount of the cutting machine;
• and
• at least one engagement portion that is engaged with at least one rotation stopper provided in the work mount of the cutting machine;
• the position reference portion of the material before cutting is recessed from a round or substantially round columnar outer peripheral surface of the held portion;
• the held portion includes a fitting portion fit to the position reference portion of the material before cutting;
• the position reference portion of the material before cutting includes a first cut surface provided by removing a portion of the round or substantially round columnar outer peripheral surface of the held portion in a planar shape;
• and
• the fitting portion includes a second cut surface provided by removing a portion of a round or substantially round columnar hole of the holding portion in a planar shape;
• and
• the second cut surface corresponds to the first cut surface.