Effects of Oral Liquid Medicaments in Children on Shear Bond Strength of Resin Composite in Primary Teeth

 Due to the prevalence of the use of  oral liquid medications in children with chronic diseases (asthma, heart problems, seizures and kidney problems) and also in children with transient diseases (influenza, colds, tonsillitis, ear infections, sinusitis and seasonal allergy) and due to the fact that several studies have shown that children’s' common medications affect topography and enamel structure, and composite bonding is dependent on enamel structure, the aim of this study was to investigate the effect of oral liquid medications used in children on composite bond strength to primary canine dental enamel.

 In this experimental-laboratory study, 90 teeth were divided into 9 groups, 8 drug groups and 1 control group (artificial saliva). Each group of 10 teeth was immersed
3 times a day for 1 minute in 10 ml of the desired drug. After 7 days and after
14 days, 5 teeth from each group were bonded with composite and their shear bond strengths were measured. Data were analyzed by one-way ANOVA, paired T-test and Pearson correlation coefficient tests. (α = 0.05).

In all groups, in comparison with the control group, the mean bond strength was not significantly different in the first and second weeks (p value > 0.05). Also, there was no significant difference between the mean composite shear bond strengths in each of the nine groups in the first and second weeks (p value > 0.05). Pearson correlation coefficient showed that there was no significant relationship between PH value with shear bond strength of composite in first weeks (p value = 0.53) and second
(p value = 0.83).

Based on this study, short-term use (up to 14 days) of medications did not significantly change the shear bond strength of the composite to enamel.