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US 11,999,141 B2Granted
Dual shell dental appliance and material constructions
AssigneeBay Materials, LLC
InventorsRay F. Stewart, John Lahlouh
Life of this patent
Estimating the term…
Abstract
Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA (“hard”) and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa (“soft”), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.
Claims20
A polymeric sheet composition, comprising:
- a thermoplastic polymer layer having a flexural modulus of from about 1,000 MPa to 2,500 Mpa;
- and
- an elastomeric layer comprising an elastomeric material having a hardness of from about A 80 to D 75.
Dependencies are inferred from the claim text.