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Paediatric dentistry

Retention in fissure resin-based sealants in schoolchildren: the etching step importance



Randomized controlled trial.

Study population

Forty-seven schoolchildren aged 9–10 years with fully sound/noncavitated erupted first permanent molars were included and randomly allocated in control and experimental groups in a split-mouth design.


47 schoolchildren (94 molars) fissure sealants applied using self-etch universal adhesive system.


47 schoolchildren (94 molars) fissure sealants applied using conventional acid-etching technique.

Outcome measure

Retention of sealants and secondary caries incidence (ICDAS).

Data analysis

Chi-square test.


Conventional acid-etch sealants retention was superior to self-etch after 6 and 24 months (p < 0.001), but no differences were found in caries incidence after 6 and 24 months (p > 0.05).


Clinical retention of fissure sealants using conventional acid-etch technique is greater than self-etch.

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Correspondence to Paulo Antônio Martins-Júnior.

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The authors declare no competing interests.

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Cite this article

Pereira, T.S., Clementino, L.C., Freire-Maia, J. et al. Retention in fissure resin-based sealants in schoolchildren: the etching step importance. Evid Based Dent 24, 79–80 (2023).

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