One study reported that laser preparation as an adjunct to acid-etching enhanced the retention rate .
No significant difference in the incidence of caries was reported .
And no significant differences were found in heart rates , oxygen saturation or degree of the patient dental anxiety between acid-etching and laser preparation .
Conclusion The present limited evidence suggests that lasers could be an effective pretreatment method .
The retention rate was similar to that of conventional acid etching .
Background This systematic review aim ed to assess the clinical effects of laser preparation compared to other types of chemical or mechanical preparation of tooth surfaces used in fissure sealant placement .
In vitro evaluation of enamel demineralization after Er:YAG and Nd:YAG laser irradiation on primary teeth.
OBJECTIVE This in vitro study evaluated the influence of both Er : YAG and Nd : YAG laser irradiation on  deciduous enamel demineralization .  BACKGROUND DATA Although there are still few studies on the use of the high-intensity laser for caries prevention in deciduous teeth , it is believed that its use on the dental structure can lead to a more acid-resistant surface . METHODS Forty enamel sample s obtained from 22 deciduous first molar teeth were ground and r and omly divided into four groups ( n = 10 ) : group 1 ( G1 ) , no treatment ( negative control ) ; G2 , fluoride ( positive control ) ; G3 , Er : YAG laser ( 2 Hz , 60 mJ , 40.3 J/cm(2 ) ) ; G4 , Nd : YAG laser ( 80 mJ , 10 Hz , 0.8 W ) . After the surface treatment , the sample s were su bmi tted to an acid challenge that consisted of a 5-day immersion in demineralizing ( 3 h ) and remineralizing solution ( 21 h ) . Next , a microhardness test was preformed . RESULTS Analysis of variance ( ANOVA ) and Student Newman Keuls tests were performed ( alpha = 5 % ) . The percentage of lesion inhibition for each group was as follows : G2 , 59.4 % ; G3 , 35.7 % ; and G4 , 40.4 % . As regards the percentage loss of mineral volume , there was no statistical difference between groups G2 ( 444.37 + /- 146.42 ) and G3 ( 441.81 + /- 207.08 ) when compared with group G1 ( 281.03 + /- 134.57 ) . All experimental groups presented a lower mineral loss compared with the non-irradiated sample s ( G4 ) . CONCLUSION The findings of the present study revealed that both Nd : YAG and Er : YAG lasers can be an alternative tool for enhancing deciduous enamel acid resistance
One study reported that laser preparation as an adjunct to acid-etching enhanced the retention rate .
No significant difference in the incidence of caries was reported .
And no significant differences were found in heart rates , oxygen saturation or degree of the patient dental anxiety between acid-etching and laser preparation .
Conclusion The present limited evidence suggests that lasers could be an effective pretreatment method .
The retention rate was similar to that of conventional acid etching .
Background This systematic review aim ed to assess the clinical effects of laser preparation compared to other types of chemical or mechanical preparation of tooth surfaces used in fissure sealant placement .