New Maillefer Protaper Gold system is more flexible and with better access. Progressive conicity. Manufactured in nickel-titanium with the latest generation in rotary mechanical instrumentation in endodontics for a quick and efficient preparation of root canals respecting the anatomy of the same elements. Advantages: The multiple conicidad improves the flexibility of the cutting efficiency and reduces the stress - The wide and convex ducts are configured using only 3 to 4 instruments - Shorter work time: less instruments - Cutting efficiency - Safe and simple.