A method for manufacturing a dental or medical tool the method comprising the steps of positioning a p re-fluted blank (14) including a stem (24) and a shank (22) within a machine (30), using a probe to identify a position and/or an orientation of at least one flute (26) of the p re-fluted blank (14) and/or the position and/or orientation of an orientation indicator (28) of the pre-fluted blank (14), and using the machine (30) to form a cutting end region (36) at the end of the stem (24) of the pre-fluted blank (14) remote from the shank (22), the flute (26) extending into the cutting end region (36), the machine (30) being controlled to ensure that the cutting end region (36) is correctly orientated relative to the flutes (26) of the pre-fluted blank (14).
B23P 15/28 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe
A61C 3/02 - Instruments à forer ou couperInstruments agissant à la façon d'une décapeuse au jet de sable
B23C 5/10 - Fraise à queue, c.-à-d. comportant une queue incorporée
B23P 15/34 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe d'outils de coupe de fraises
G05B 19/418 - Commande totale d'usine, c.-à-d. commande centralisée de plusieurs machines, p. ex. commande numérique directe ou distribuée [DNC], systèmes d'ateliers flexibles [FMS], systèmes de fabrication intégrés [IMS], productique [CIM]
B24B 3/06 - Affûtage des arêtes tranchantes, p. ex. des outilsAccessoires à cet effet, p. ex. porte-outils des fraises des fraises en bout ou des fraises à surfacer, p. ex. fraises à queue
A method of manufacture of a dental prosthesis is described, comprising using a rotary milling or drilling tool (16) to mill or drill a block (12) of a sintered ceramic material. The use of a tool (16) to mill or drill material from a block (12) of a sintered ceramic material such as lithium silicate or lithium disilicate allows manufacture of a glass ceramic dental prosthesis in a relatively efficient manner.
The invention provides a dental milling tool (10) for milling dental materials in the making of dental prostheses. The dental milling tool is a ball-nose end mill having three helical flutes (20), each flute being associated with a cutting edge, each cutting edge having chip breakers (30) along the curved edges of the ball. The dental milling tool may be formed from a hard material such as carbide based material, ceramic, cermet, superhard materials including polycrystalline diamond (PCD) and cubic boron nitride (CBN), and diamond composite. Alternatively, the dental milling tool may be coated with a hard coating such as diamond coating, diamond-like- carbon (DLC), nitride based coating such as titanium aluminium nitride (TiAIN), aluminium titanium nitride, (AITiN), and titanium nitride (TiN), and ceramic coating.
