Large bud, evaluation of access cavities
Excellent overview during the preparation.
Direct view and control during use of magnifying spectacles and operating microscopes.
Fast preparation and removal of old root fillings.
Easier discovery of the canals.
Extension of sclerosed canals.
Preparation of a straight access to the canals without weakening of crowns.
Removal of hard root filling materials, cements and pins.
Avoids perforation and stepping.