The effects of Nd:YAG laser on dental pulp of rhesus monkeys
- VernacularTitle:Nd:YAG激光对猴牙牙髓的影响
- Author:
Xinmei CHEN
- Publication Type:Journal Article
- Keywords:
Macaca mulatta;
Laser;
Dental pulp
- From:
Journal of Practical Stomatology
1995;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To observe the effects of Nd:YAG laser on dental pulp of rhesus monkeys and compare the effects between methylene blue and silver nitrate on laser irradiation. Methods: 27 teeth of 3 monkeys were irradiated respectively by 1 592 mJ/mm 2 ,3 185 mJ/mm 2 or 4 777 mJ/mm 2 Nd:YAG laser. Befor irridiation 9 teeth were treated with methylene blue on the surfaces and 9 treated with silver nitrate.The other 3 teeth were used as controll.One hour after irradiation,pulp samples were obtained and observed with histological examination. Results: No harmful response was observed in the dental pulp following laser irradiation at 1 592 mJ/mm 3 no matter what teatment of occlusional surfaces. Mild change were observed in the pulp irradiated with the laser at 3 185 mJ/mm 2. Severe damages were found in the 4 777 mJ/mm 2 laser treated group.Methylene blue could enhance pulp damage but silver nitrate could minish the damage by isolating tooth surface from laser beam. Conclusion: Great output energy of Nd:YAG laser may cause damaging effects on dental pulp and the use of absorption dye onto the surface of teeth may enhance the effect of laser irradiation.
