The present study demonstrated that saliva of individuals under orthodontic treatment is subjected to changes in properties that have implications on the onset of ACL.

Aim This prospective cohort study aimed to investigate whether orthodontic appliance removal (OAR) combined with caries‐preventive strategies and fluoride varnish treatments alters salivary physicochemical properties, changes the activity of carbonic anhydrase VI (CA VIACT) and α‐amylase (α‐AMLACT), and favors the regression of active caries lesions (ACL). Design Twenty‐two individuals aged between 13 and 24 years were assessed for the presence of visible biofilm, daily sugar exposure, caries activity, salivary flow rate (SFR), pH, buffering capacity (BC), and CA VIACT and α‐AMLACT activity at baseline, and 1, 5, and 13 weeks after OAR. Variables were assessed using repeated‐measures analysis of variance, Cochran's Q and McNemar's test, and Pearson's correlation. Results We observed a significant decrease in the number of ACL at the 5‐week (29% reduction) and 13‐week follow‐ups (58% reduction). At the 5‐ and 13‐week follow‐ups, the percentage of visible biofilm and sugar exposure decreased, whereas the salivary pH and α‐AMLACT activity significantly increased. BC and CA VIACT remained unchanged throughout the follow‐up. Conclusion OAR combined with caries‐preventive strategies and fluoride varnish treatments favored the regression of ACL and increased salivary pH and α‐AMLACT activity, whereas BC and CA VIACT remained stable.

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The objective of this study was to report the clinical treatment of a child with Incisor Molar Hipomineralization. A 5-year-old Brazilian child, male gender, was diagnosed with Molar Incisor Hypomineralization, reporting high teeth sensitivity. After anamnesis and clinical examination, treatment was conducted with three weekly applications of fluoride varnish containing 5% CPP-ACP complex. Also, it was advice to the patient for using a toothpaste containing fluoride and CPP-ACP (MI Paste Plus). After that, molars with great tooth structure loss were restored with resin modified glass ionomer cement. Prior to the first topical application of varnish with CPP-ACP and fluoride toothpaste containing CPP-ACP, a sensitivity test was conducted using thermal stimulus and facial pain scale. It was observed relative sensitivity decrease between sessions, reporting no sensitivity at the last session before the restoration. The treatment of Molar Incisor Hypomineralization teeth with CPP-ACP complex associated with fluoride varnish can be an alternative to reduce sensivity.

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