US 12,451,228 B2
Augmented reality method and system for dental preparations
Julia Keren, Westmount (CA); and Nathaniel Lasry, Hampstead (CA)
Assigned to Intellident Dentaire Inc., Westmount (CA)
Filed by Intellident Dentaire Inc., Westmount (CA)
Filed on Apr. 6, 2023, as Appl. No. 18/131,656.
Claims priority of provisional application 63/327,948, filed on Apr. 6, 2022.
Prior Publication US 2023/0326573 A1, Oct. 12, 2023
Int. Cl. G16H 20/40 (2018.01); A61B 90/00 (2016.01); G06T 19/00 (2011.01); G06T 19/20 (2011.01)
CPC G16H 20/40 (2018.01) [A61B 90/37 (2016.02); G06T 19/006 (2013.01); G06T 19/20 (2013.01); A61B 2090/365 (2016.02); G06T 2210/41 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method comprising:
with a surface representation of a virtual dental preparation being provided for a specific tooth, and until an exit condition is reached, repeating, in real time during preparation of a real-dental preparation:
generating an overlay from the surface representation based on a computed difference between the real-dental preparation and the virtual dental preparation;
coincidently superimposing the overlay upon a feed of images of the real-dental preparation thereby generating an augmented reality feed of images;
displaying the augmented reality feed of images; and
triggering generation of a new surface representation of a further virtual dental preparation when the computed difference is smaller than a previously set value indicating that removal of material from the real dental preparation exceeds a preset tolerance, the further virtual dental preparation replacing the virtual dental preparation and the new surface representation replacing the surface representation in a next iteration; and
upon reaching the exit condition, suggesting modification of a contact inner surface of a suggested crown, the suggested modification being based on a final version of the real-dental preparation, the contact inner surface defining an interface between the suggested crown and the final version of the real-dental preparation, the final version of the real-dental preparation being the real-dental preparation satisfying the exit condition tied to the computed difference.