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Recent advances
1. Air abrasion technique:
• A stream of gas–borne aluminum oxide abrasive particles to wear
away and abrade the tooth structure.
• The usual range of size of the abrasive particles utilized in the air
abrasive technique is25- 50 microns while the pressure used to
apply the particles ranged between 80-160 psi.
• The present outcome in the field of air abrasion is the Kinetic cavity
preparation using KCP2000.
• It is a precise, gentle, time saving , painless as it reduces thermo-
genesis and omits the vibration of the ordinary rotary tools.
• It is recommended for treatment of children, pregnant women and
other medically compromised patients.
2.
3. Lasers in tooth preparation:
• Nd-Yag (Neodymium – Ytterium/Alluminum/Garnet) is most
suitable for tooth preparation.
• complications such as the difficulty in the localization of its effect
and the enormous temperature rise (Elmortada,1995).
• Overcome by innovation of a hydrokinetic laser to employ a
combination of laser energy and water spray .
• employment of pulsed laser and the recent technology of micro and
nano seconds have yielded a hope in achieving the objective of
utilizing only the required laser energy
