초록 ▼

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric shell appliances configured to receive the teeth and incrementally

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric shell appliances configured to receive the teeth and incrementally reposition individual teeth in a series of successive steps. The individual appliances may be formed from layers having different stiffnesses (elastic moduluses), and the stiffnesses of successive appliances may be different, or both.

대표청구항 ▼

1. A dental appliance comprising:a laminar shell having cavities shaped to receive teeth, wherein at least a first layer of the shell is composed of a material having a first stiffness and a second layer of the shell is composed of a material having a second stiffness which differs from the film, st

1. A dental appliance comprising:a laminar shell having cavities shaped to receive teeth, wherein at least a first layer of the shell is composed of a material having a first stiffness and a second layer of the shell is composed of a material having a second stiffness which differs from the film, stiffness, wherein the first layer comprises a discontinuous inner layer and the second layer comprises a continuous outer layer, and wherein at least a portion of the inner layer is configured to engage individual teeth and the outer layer has a lower elastic modulus than the inner layer.