The assortment of special expansion screws proposed by Leone derives from over 30 year experience in the manufacture of expansion
screws. The screw selection ranges from the Pagani’s classical fan type screw to the Bertoni’s three directional one.
The special purpose expansion screws are made of biomedical stainless steel with a mechanical tolerance superior to 1/100 mm.
The thread parts are absolutely smooth and they ensure great sturdiness, good friction and prevent from any unwanted turning back.

Three Directional Screw Anatomical for Lower Arch

Length	Horizontal Expansion	Vertical Expansion
13mm	4mm	2.5mm	0.4mm Protrusive	2.5mm