In pursuit of a highly safe reciprocating file capable of minimizing damage to the natural tooth during root canal preparation, Bondent Group began researching files that combine safety with superior cutting efficiency. Around this time, Dr. Nuno Pinto from Portugal joined the team, providing valuable support in both design and clinical testing. Over the course of two years, we conducted five rounds of continuous sampling, which led to laboratory testing and confirmed an ideal level of performance. Confident in the results, we proceeded to clinical trials in collaboration with Dr. Pinto. Thanks to its outstanding clinical performance, the Flash file was successfully launched in 2022.