ObjectiveTo compare the repair effect of penetrating resin versus fluoride coating on chalky plaque caries of isolated deciduous anterior teeth and their penetrating capacity. MethodsForty deciduous anterior teeth from early bottle caries children with chalky plaque were collected for preparing specimens. Specimens were randomly assigned to control group or experiment group, with 20 deciduous anterior teeth in each group. Teeth specimens of the control group were coated with fluoride on dental crown caries surface, and teeth specimens of the experiment group were coated with penetrating resin on dental crown caries surface. All specimens were immersed in artificial saliva for 6 months after specimen processing. The penetration percentage (PP), L* value, and chalky plaque score were compared between the two groups after 6 months of specimen processing. The enamel microhardness (Vickers Hardness Number ［VHN］) before specimen processing, after 3 and 6 months of specimen processing, and after demineralization was compared between the two groups, respectively. ResultsAfter 6 months of specimen processing, the experiment group yielded a higher PP as compared with the control group (P＜0.05); furthermore, the L* value of both groups was decreased as compared with before processing, the chalky plaque score of both groups was elevated as compared with before processing, and the experiment group yielded a lower L* value and a higher score of chalky plaque score as compared with the control group (all P＜0.05). After 3 and 6 months of specimen processing, and after demineralization, the enamel VHN was higher in both groups than that before processing, and was higher in the experiment group than the control group (all P＜0.05). ConclusionCompared with fluoride, the penetrating resin has a stronger penetrating capacity in the treatment of chalky plaque caries of isolated deciduous anterior teeth, exerting superior improved effects on enamel hardness and chalky plaque.

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