	US 11,744,675 B2
	Elastic orthodontic appliances, systems, and methods for use
Loc Phan, Santa Clara, CA (US)
Assigned to Smylio Inc., Fremont, CA (US)
Filed by Smylio Inc., Fremont, CA (US)
Filed on Jan. 13, 2021, as Appl. No. 17/148,078.
Application 17/148,078 is a continuation of application No. 16/775,202, filed on Jan. 28, 2020, granted, now 11,317,992.
Claims priority of provisional application 62/797,797, filed on Jan. 28, 2019.
Prior Publication US 2021/0153979 A1, May 27, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 7/08 (2006.01)

CPC A61C 7/08 (2013.01)

5 Claims

1. An orthodontic appliance comprising:

a stack of polymer shells, the stack of polymer shells being shaped to have cavities shaped to receive teeth, the stack of polymer shells comprising non-affixed portions and affixed portions, the stack of polymer shells comprising a first shell, second shell, and third shell,

wherein the first shell has a bottom first shell surface with the cavities shaped to receive the teeth and a top first shell surface opposite the bottom first shell surface, and a first shell edge therebetween;

wherein the second shell is shaped to receive the first shell, wherein the second shell has a bottom second shell surface in contact with the top first shell surface and a top second shell surface opposite the bottom first shell surface, and a second shell edge therebetween;

wherein the third shell shaped to receive the second shell, wherein the third shell has a bottom third shell surface in contact with the top second shell surface and a top third shell surface opposite the bottom third shell surface, and a third shell edge therebetween;

wherein the affixed portions are located about the first shell edge, second shell edge, and third shell edge, wherein the first shell edge and the second shell edge are separated by a first gap of a first uniform width, and wherein the first shell edge and the third shell edge are separated by a second gap of the first uniform width or a second uniform width.