The effect of cavity disinfectants on microleakage of composite restorations in primary teeth

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ABSTRACT

Aim

The purpose of this study was to determine the effect of different cavity disinfectants on microleakage of Class V resin-
based composite restorations in primary teeth.

Methods

Standard non-beveled Class V cavities were prepared on
50 human primary anterior teeth with the incisal and cervical margin placed on the enamel. The crowns were randomly divided into 6
groups. Four experimental groups of 10 teeth each, in which cavities were disinfected using the following solutions: 1) S. persica extract
(Ethanol 1 mg/ml); 2) 1.3 sodium hypochlorite (NaOCl); 3) 0.2 chlorhexidine gluconate (CHX), and 4) No solution
applied. Two control groups; 5 teeth each; 5) Negative control: filled cavity and entirely coated with nail varnish and 6) positive control:
empty cavity and without nail varnish coating. Each cavity in groups 1-5 were filled with Filtek Z350 XT Universal Restorative (3M Espe,
St. Paul, USA). All specimens were thermocycled for 500 cycles (5C/55C) and prepared for microleakage evaluation using a 2
methylene blue.

Results

For the experimental groups; there was no significant difference in dye penetration between the incisal and
cervical walls in all groups (P0.176). However comparing microleakage by location/walls showed a significant difference in dye
penetration between the incisal walls (P0.014) and cervical walls (P.045). CONCLUSIONS: None of the disinfectant
solutions in the experimental groups were able to prevent dye penetration. In comparison to chlorhexidine gluconate and sodium
hypochlorite; application of S. persica did not increase microleakage and was not detrimental to enamel and dentin adhesion using the
restorative technique and materials used in this study.

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