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Nd:YAG laser effects on the occlusal surface of premolars
S I Myaki1, I S Watanabe, C de P Eduardo
1Departamento de Anatomia, Universidade de São Paulo, Brazil.
Purpose:
To evaluate with the scanning electron microscope (SEM) the effects of a pulsed Nd: YAG laser on the occlusal surface of human premolars in vitro.
Materials And Methods:
Twenty normal premolars extracted for orthodontic reasons were used and separated in two groups. Group 1 received the irradiation at 2.0 watts, repetition rate of 20 Hz and 124.3 J/cm2 of energy density during 3 minutes, on the occlusal fissure. Group 2 received the laser irradiation in only half of the fissure.
Results:
The SEM analysis revealed that in the case of shallow fissures the sealing was total but in narrow and deep fissure the sealing was partial or was in complete.