Objective: This study was to investigate the mechanical properties of different brands thermodynamic nickel-titanium(NiTi) archwires under controlled temperature and in artificial saliva to provide some reference for its clinical application.

Objective: To discuss a method about shaping a dynamic and visualizational color stress cloud chart of finite element model of Ni-Ti arch wire for orthodontics.

Research advances on the mechanical properties of nickel-titanium archwires;

case patients of teeth slight crowding are treated by using titanium nickel wire to arch lips and cheeks for aligning the teeth.