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 .
Split-mouth study of sealant retention with carbon dioxide laser versus acid etch conditioning.
A split mouth clinical trial was undertaken to compare the  retention of fissure sealants placed using laser or acid conditioning .  After a mean follow-up period of 14.5 months , the retention rate for laser conditioning was greater than that for acid etching ( 97.9 per cent versus 94.6 per cent , respectively ) , although this difference was not statistically significant . No adverse effects occurred during or subsequent to laser conditioning procedures . It is concluded that carbon dioxide laser conditioning is a viable alternative to acid etching for fissure sealing
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 .