US 11,850,110 B2
Method of making anterior dental restorations from sintered preforms
Marco Antonio Jokada, Diamond Bar, CA (US); David Christopher Leeson, Laguna Beach, CA (US); Vaheh Golestanian Nemagrdi, Orange, CA (US); Prabhakar Thirugnanasambandam, Irvine, CA (US); and Kenad Destanovic, Mission Viejo, CA (US)
Assigned to James R. Glidewell Dental Ceramics, Inc., Newport Beach, CA (US)
Filed by James R. Glidewell Dental Ceramics, Inc., Newport Beach, CA (US)
Filed on Jan. 30, 2023, as Appl. No. 18/161,454.
Application 18/161,454 is a continuation of application No. 17/085,239, filed on Oct. 30, 2020, granted, now 11,564,773.
Claims priority of provisional application 62/929,303, filed on Nov. 1, 2019.
Prior Publication US 2023/0172690 A1, Jun. 8, 2023
Int. Cl. A61C 13/00 (2006.01); A61C 5/77 (2017.01); A61K 6/818 (2020.01); A61C 13/083 (2006.01)
CPC A61C 5/77 (2017.02) [A61C 13/0004 (2013.01); A61C 13/083 (2013.01); A61K 6/818 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A method for making an anterior dental restoration from a fully sintered zirconia preform, comprising
obtaining an anterior dental restoration virtual design and a virtual model of a preform body, wherein the anterior dental restoration virtual design comprises and incisal edge and the preform body comprises a cylindrical shape having a stem projecting from a curved outer surface;
nesting the anterior dental restoration virtual design within the virtual model of the preform;
detecting a topmost point on the incisal edge of the anterior dental restoration virtual design and using the topmost point to define a line of separation that is either parallel to or orthogonal to the incisal edge of the anterior dental restoration virtual design;
generating machining instructions for shaping an anterior dental restoration from a fully sintered zirconia preform, said machining instructions comprising:
a first tool path located on a first side of the line of separation, and
a second tool path located on a second side of the line of separation; and
machining the fully sintered zirconia preform using the machining instructions.