US 11,969,309 B2
Tooth repositioning system
Ta-Hua Yu, Woodbury, MN (US); Jennifer L. Cook, Cypress, TX (US); Karl J. L. Geisler, St. Paul, MN (US); Paul A. Sevcik, White Bear Township, MN (US); Bruce R. Broyles, Oakdale, MN (US); and Jennifer K. Tully, St. Paul, MN (US)
Assigned to Solventum Intellectual Properties Company, St. Paul, MN (US)
Appl. No. 17/926,803
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jun. 28, 2021, PCT No. PCT/IB2021/055764
§ 371(c)(1), (2) Date Nov. 21, 2022,
PCT Pub. No. WO2022/003534, PCT Pub. Date Jan. 6, 2022.
Claims priority of provisional application 63/091,144, filed on Oct. 13, 2020.
Claims priority of provisional application 63/046,507, filed on Jun. 30, 2020.
Prior Publication US 2023/0200944 A1, Jun. 29, 2023
Int. Cl. A61C 7/08 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01)
CPC A61C 7/08 (2013.01) [B32B 27/08 (2013.01); B32B 27/308 (2013.01); B32B 27/36 (2013.01); A61C 2201/00 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2307/546 (2013.01); B32B 2535/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A system for repositioning teeth of a patient from an initial tooth arrangement to a final tooth arrangement, the system comprising a plurality of incremental position adjustment appliances, each comprising a shell including an arrangement of cavities shaped to receive and reposition teeth of the patient, wherein the cavities in at least one appliance of the plurality of incremental adjustment appliances in the system have a different geometry than that of at least one other appliance in the system of the plurality of incremental adjustment appliances, and wherein at least two of the appliances in the system are successively worn by the patient to exert force on at least one tooth and move the teeth of the patient from a first arrangement to a successive arrangement different from the first arrangement, and wherein the plurality of incremental adjustment appliances comprises:
a first incremental position adjustment appliance including a first shell, the first shell having a bending stiffness factor less than about 0.1 GPa*mm3 as measured within 2 mm of a trimmed line of incisors on a labial side of the first shell, and an elastic modulus no greater than about 1.5 GPa, wherein the first shell is a multilayer shell that comprises:
a core layer with a first major surface and a second major surface, wherein the core layer has an elastic modulus of greater than about 1.3 GPa and a bending stiffness factor of greater than 0.02 GPa*mm3;
a first interior layer on the first major surface of the core layer, and a second interior layer on the second major surface of the core layer, wherein each of the first and the second interior layers have an elastic modulus of no greater than 0.5 GPa and a bending stiffness factor less than 0.001 GPa*mm3; and
a first exterior layer on the first interior layer and a second exterior layer on the second interior layer, wherein the first and the second exterior layers each have an elastic modulus of greater than about 1.3 GPa and a bending stiffness factor less than 0.002 GPa*mm3; and
a second incremental position adjustment appliance including a second shell with a bending stiffness factor of at least about 0.1 GPa*mm3 as measured within 2 mm of a trimmed line of incisors on a labial side of the second shell.