Dental caries and periodontal diseases are plaque mediated diseases.Poor oral hygiene and inappropriate dietary behaviour can lead to increased plaque accumulation. Dental plaque is a biofilm that is formed over the teeth and prosthetic appliances placed in the oral cavity. As dental plaque is not easily visible to the naked eye, its removal is difficult and complex. In order to remove dental plaque and improve the oral hygiene, the use of disclosing agents has been recommended. Disclosing agents are preparations containing dye or other colouring agents which is used for the identification of bacterial plaque that can be distinctly seen providing a valuable visual aid and help in the maintenance of good oral health.

We read with great interest the article entitled “Diagnóstico de fisura labio palatina en niños pequeños de Nicaragua: impacto del diagnóstico a nivel familiar”. It is well known that children with CL/P are at risk for psychological problems. In this connection, we would like to briefly discuss the finding of the study of Ortega and Vázquez (2018).

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Background: The present study was undertaken to evaluate effect of the salivary flow rate, pH, viscosity and buffering capacity on caries experience in government school children.Methods: This case-control study was conducted amongst the Government school children of Bangalore city aged 6-14 years. A total of 180 school children were selected out of what 90 were selected for the test group based on the presence of one or more active dental caries and another 90 were selected for the control group who were free of dental caries at the time of examination. Saliva samples were collected from all subjects and were estimated for flow rate, pH, viscosity and buffering capacity.Results: Mean salivary flow rate, pH and buffer capacity have been found to be significantly lower and mean salivary viscosity has been found to be significantly higher among children with dental caries.Conclusions: The physical and biochemical properties of saliva, such as salivary flow rate, pH, buffering capacity and viscosity are significantly related with the caries experience in children.