Effect of activation and preactivation on the mechanical behavior and neutral position of stainless steel and beta-titanium T-loops.

Objective: To quantify, for each activation, the effect of preactivations of differing distribution and intensity on the neutral position of T-loops (7-mm height), specifically the horizontal force, moment to force (M/F) ratio, and load to deflection ratio.

Methods: A total 100 loops measuring 0.017 × 0.