Mechanical root canal preparation gains more and more importance. Extremely flexible files made from nickel titanium alloy allow preparation of the root canal with rotating files.
The best results can be achieved very quickly using the Crown-down technique which combines W&H Endo NiTi contra-angle handpieces with nickel titanium files.
Connection diameter 20 mm, for motors with ISO connection according to ISO 3964 (DIN 13.940)
Types
WD-73 M
Contra-angle handpiece 70:1, for motor speed up to 25,000 rpm
WD-74 M
Contra-angle handpiece 128:1, for motor speed up to 40,000 rpm
Appropriate inserts: Root canal instruments suitable for 360°,
particulary nickel-titanium files, shank diameter 2.35 mm (type 1) according to EN ISO 1797-1:1995.