New Maillefer Protaper Gold system even more flexible and with better access to the tooth. Progressive taper. Manufactured in nickel-titanium, they are the latest generation in rotary mechanical instrumentation in endodontics for a quick and efficient preparation of root canals while respecting their anatomy. Advantages: Multiple taper improves flexibility, cutting efficiency and reduces stress - Long, convex ducts are configured using only 3 to 4 instruments - Shorter working time: fewer instruments - Cutting efficiency - Safe and simple.