Explain the Root-End Preparation - endodontic surgery
a. Class I type preparation, 3mm depth.
b. Tips are designed in a length of 3 mm to prevent procedural errors.
c. Ultrasonic retrotips have superior operator control, decreased risk of perforation than the micro-handpiece.
d. The frequency "speed" of the ultrasonic tips should not be more than 4000
e. Most ultrasonic tips are:
- Stainless steel,
- Diamond coated.
f. Do light touch cutting with correct amount of water to prevent overheating and crack formation.