Which of the following scaling instruments is more likely to produce undue
a. Sickle Scaler U 15-33.
b. Younger-Good 7-8.
d. Gracey 1-2.
Which of the following items of equipment uses an activated insert tip together with
the bubbling action of water to dislodge calculus and stain?
a. Prophy jet.
b. Dental unit sonic scaler.
Ultrasonic dental unit.
To avoid damage to tooth structure, does the insert tip of the ultrasonic dental unit
have to be kept moving constantly?
Which of the following items of equipment is handled like a slow-speed
a. Ultrasonic dental unit.
b. Air polishing prophylaxis unit.
Dental unit sonic scaler.