Loc X. PHAN,Muhammad CHISHTI,Ross J. MILLER,H. Robert VANDENBERG,Eric KUO
申请号：
US16877136
公开号：
US20200276746A1
申请日:
2020.05.18
申请国别(地区):
US
年份:
2020
代理人:
摘要：
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.
