US 11,864,962 B2
Method of making dental restorations from sintered preforms
David Leeson, North Tustin, CA (US); Marco A. Jokada, Diamond Bar, CA (US); Vaheh Golestanian Nemargrdi, Orange, CA (US); and Hossein Madanipour, 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 Mar. 7, 2022, as Appl. No. 17/687,910.
Application 17/687,910 is a continuation of application No. 16/426,180, filed on May 30, 2019, granted, now 11,266,485.
Application 16/426,180 is a continuation of application No. 16/291,276, filed on Mar. 4, 2019, granted, now 10,973,616.
Application 16/291,276 is a continuation of application No. 15/259,550, filed on Sep. 8, 2016, granted, now 10,258,440.
Claims priority of provisional application 62/215,525, filed on Sep. 8, 2015.
Prior Publication US 2022/0183801 A1, Jun. 16, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 13/00 (2006.01); A61C 13/083 (2006.01); A61C 13/20 (2006.01); G05B 19/4099 (2006.01); A61K 6/40 (2020.01)
CPC A61C 13/0004 (2013.01) [A61C 13/0006 (2013.01); A61C 13/0022 (2013.01); A61C 13/083 (2013.01); A61C 13/20 (2013.01); A61K 6/40 (2020.01); G05B 19/4099 (2013.01); G05B 2219/35134 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for making a dental restoration from a sintered ceramic preform, comprising:
obtaining a 3D CAD file of a dental restoration design and a computer model of a preform, wherein the preform comprises a preform body and a preform stem that projects from an outer surface of the preform body at a stem contact point;
nesting the dental restoration design within the computer model of the preform body by identifying at least two nesting options, wherein the location of the stem contact point relative to the dental restoration design is different for the at least two nesting options, and selecting one of the at least two nesting options;
generating machining instructions for shaping the dental restoration from the preform based on the selected nesting option; and
machining a sintered ceramic preform body into a final, posterior dental restoration crown with a single grinding tool in less than 1 hour of machining time.