US 12,090,018 B2
Dental milling tool
Wan Tsin Goh, Bristol (GB); and Graham Handbury, Stroud (GB)
Assigned to PRIMA DENTAL MANUFACTURING, LTD, Gloucester (GB)
Filed by Prima Dental Manufacturing Ltd, Gloucester (GB)
Filed on Apr. 5, 2023, as Appl. No. 18/296,298.
Application 18/296,298 is a continuation of application No. 16/402,808, filed on May 3, 2019, granted, now 11,633,257.
Claims priority of application No. 1807472 (GB), filed on May 8, 2018.
Prior Publication US 2023/0240797 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 3/02 (2006.01); A61C 8/00 (2006.01)
CPC A61C 3/02 (2013.01) [A61C 8/0089 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A dental milling tool for milling dental materials in the making of dental prostheses, comprising:
the dental milling tool is a ball-nose end mill with a diameter of 0.3 mm-8 mm and having precisely two helical flutes, each flute being associated with a cutting edge, each cutting edge having chip breakers along the curved edges of the ball; and
the dental milling tool is formed from or coated with a hard material selected from the group consisting of: carbide based material, ceramic, cermet, superhard materials including polycrystalline diamond (PCD) and cubic boron nitride (CBN), and diamond composite, diamond coating, diamond-like-carbon (DLC), nitride based coating such as titanium aluminium nitride (TiAlN), aluminium titanium nitride, (AlTiN), and titanium nitride (TiN), and ceramic coating.