The βTMA (Beta Titanium) wire is most useful for space closure and finishing because it offers an optimal balance of flexibility and strength. This allows for precise, controlled force application, essential for effective tooth movement during the finishing phase. βTMA wires have a lower modulus of elasticity compared to stainless steel, providing better springback and resilience. They also allow for easy adjustment without permanent deformation, facilitating fine-tuning of tooth positions. These mechanical properties make βTMA wires ideal for delicate movements and space closure, improving treatment efficiency and outcomes.

Reference: Proffit, Contemporary Orthodontics, 6th Edition.