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 .
An in vitro investigation of pre‐treatment effects before fissure sealing
BACKGROUND Fissure sealants prevent occlusal caries in permanent molars .  Enamel preparation methods are used before fissure sealing . AIMS To investigate effects of bioglass air-abrasion pre-treatment with and without an adhesive , on fissure enamel of permanent teeth , with respect to etchability , microleakage and microtensile bond strength . DESIGN Half of the occlusal surfaces of 50 extracted premolars underwent bioglass air-abrasion . Dye was applied to the entire occlusal surface . Photographs were taken to score etched surface by dye uptake . Adhesive was applied to 25 of the bioglass-treated areas and all teeth were fissure sealed , sectioned , and evaluated using confocal microscopy . Buccal and lingual surfaces of a further eight premolars were acid-etched and r and omly received : air-abrasion , adhesive , both , or none before sealant application for microtensile bond strength measurement in half of the sample s immediately and half following 6 months of water immersion . RESULTS Linear mixed models and multinomial logistic regression were used ( P = 0.05 ) . Bioglass air-abrasion significantly improved enamel etchability and reduced microleakage . The addition of an adhesive made no difference to either microleakage or microtensile bond strength . The combination of bioglass abrasion and adhesive led to more cohesive , rather than adhesive , failure . CONCLUSIONS Bioglass air-abrasion improved enamel etchability and reduced microleakage irrespective of the adhesive use but neither pre-treatment affected the microtensile bond strength
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 .