A study on FlexMaster : a Ni-Ti rotary engine driven system for root canal preparation. Mymensingh Medical Journal, [S. l.], v. 15, n. 2, p. 135–141, 2007. DOI: 10.3329/mmj.v15i2.31. Disponível em: https://www.banglajol.info/index.php/MMJ/article/view/31. Acesso em: 26 jun. 2026.