S1* Diamond-coated instrument for preparation of a bone flap for lateral sinus floor augmentation and for crown edge extensions.S2* Instrument with diamond-coated ball for preparation of a bone flap for lateral sinus floor augmentation and for crown edge extensions.S3* Instrument for gentle detachment of the Schneiderian membrane from the bone. The coolant film protects the Schneiderian membrane by means of three coolant openings.S4* Instrument with rounded edges for atraumatic detachment of the Schneiderian membrane.S5* Instrument with rounded edges for atraumatic detachment of the Schneiderian membrane.