| 摘要 |
PROBLEM TO BE SOLVED: To provide improved devices, systems, and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. SOLUTION: The improved devices, systems, and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement are disclosed. Repositioning is accomplished with a system comprising a series of polymeric shell appliances (100) configured to receive the teeth (115) and incrementally reposition individual teeth in a series of successive steps. The individual appliances may be formed from layers (110, 111) having different stiffnesses (elastic moduluses), and the stiffnesses of successive appliances may be different, or both. COPYRIGHT: (C)2009,JPO&INPIT |
