This document discusses lasers and their uses in dentistry. It defines lasers as monochromatic, collimated and coherent light sources compared to conventional light sources. The key components of a laser machine are described as the active medium, pump source and resonator. Lasers can interact with tissue through reflection, transmission, scattering and absorption. Some dental uses of lasers include cavity detection, tooth preparation, light curing, bleaching, root canals, surgery and treatment of conditions like ulcers and TMJ. Laser safety, especially protective eyewear, is emphasized.

1. Prepared by DR Sara Bahaa
Osman

2. Light Amplification by Stimulated
Emission of Radiation.

4. laser
Monochromatic
Collimated
Coherent
Conventional sources
Many wavelengths
Emitted in many directions
incoherent

5. Component of Laser Machine
1-Active medium.
2-Pump Source.
3-Resonator.

6. Interactions of the laser on tissue:
The light energy produced by a laser can have
four different interactions with a Target tissue:
Reflection, Transmission, Scattering, and
Absorption.

7. Laser uses in dentistry
Diagnosis Soft Tissue Hard tissue
Laser activation Other

8. Cavity detection

9. tooth preparation

10. Light curing

11. Bleaching /Teeth Whitening

12. Root Canal Treatment

13. Frenectomies

14. Aesthetic gingival re-contouring
and crown lengthening

15. Gingival depigmentation

16. Ulcers treatment

17. TMJ Treatment

18. Advantages of laser

19. Disadvantages of laser

20. Laser safety
The most important and foremost is
protective eyewear by anyone in the vicinity
of the laser, while it is in use.