2. : LASER •
• Light Amplification by Stimulated Emission
of Radiation
•

3. •

4. •
•

5. •

6. •

7. •
light
amplification

8. •
.
•
stimulated
emission

9. •
monochromatic –
coherent –
directional –

10. Ruby Laser
•

11. Ruby
Laser

12. Ruby
Laser

13. Ruby
Laser

14. Ruby
Laser

15. Ruby
Laser

16. Ruby
Laser

17. solid-state laser •
ruby
neodymium:yttrium-aluminum
TAG
Gas laser •

18. Excimer laser •
Dye laser •
rhodamine 6G
Semiconductor •
laser

21. (nm)
193 Argon fluoride (UV)
248 Krypton fluoride (UV)
308 Xenon chloride (UV)
337 Nitrogen (UV)
488 Argon (blue)
514 Argon (green)
543 Helium neon (green)
633 Helium neon (red)
570-650 Rhodamine 6G dye (tunable)
694 Ruby (CrAlO3) (red)
1064 Nd:Yag (NIR)
10600 Carbon dioxide (FIR)

22. •
–
–
- –
-
–

23. •
CO2 •
- (

24. •
-. -
:
. –
. –
. –
). ( –
( –
).
. –
. –
. –
. –
•

25. •
- -
- -
•
– -
… –

26. •
•
•
•
•
•
•
•

27. •
Erbium Laser
Neodymium Laser
Deodymium Laser
CO2 laser
Helium laser

28. Erbium Laser
•
•
•
•

29. •
–
–
–
smear layer –
–

30. Neodymium
Laser
•
•

31. Deodymium
Laser
•
•
•

32. CO2
laser
•
•

33. Helium laser
•

34. •

35. •

36. •

37. •

38. •

39. •

40. •
•

41. •

42. Laser Pros
• Compared to the traditional dental drill, lasers:
– May cause less pain in some
instances, therefore, reducing the need for anesthesia
– May reduce anxiety in patients uncomfortable with
the use of the dental drill
– Minimize bleeding and swelling during soft tissue
treatments
– May preserve more healthy tooth during cavity
removal

43. Laser Cons
• The disadvantages of lasers are that:
– Lasers can't be used on teeth with fillings already in
place.
– Lasers can't be used in many commonly performed
dental procedures. For example, lasers can't be used
to fill cavities located between teeth, around old
fillings, and large cavities that need to be prepared
for a crown. In addition, lasers cannot be used to
remove defective crowns or silver fillings, or prepare
teeth for bridges.

44. Laser Cons
• The disadvantages of lasers are that:
– Traditional drills may still be needed to
shape the filling, adjust the bite, and polish
the filling even when a laser is used.
– Lasers do not eliminate the need for
anesthesia.
– Laser treatment tends to be more expensive
since the cost of the laser is much higher
than a dental drill.
• Lasers can cost between $39,000 and $45,000
compared to about $600 for a standard drill.