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This study aimed at evaluating the effectiveness of an adjuvant chlorhexidine–fluoride varnish (Cervitec F) for prevention and arrest of root caries on elderly participants using quantitative light-induced fluorescence (QLF). 23 participants with two or three non-cavitated root carious lesions were included and assigned to three groups of different varnishes (CF: Cervitec F, P: placebo, DP: Duraphate). Agents were applied once to root surface at baseline and in follow-up after 3, 6 and 9 months. The lesions were assessed clinically and with QLF. QLF-images were analyzed regarding fluorescence loss (Δ F ), lesion volume (Δ Q ) and bacterial activity (Δ R ) before ( t  0 ), after 14 days ( t  1 ), 6- ( t  2 ) and 12-months ( t  3 ). CF showed a significant difference between  t  0  and  t  3 : ∆ F  (− 12.51 [15.41] vs. − 7.80 [16.72],  p  = 0.012), ∆ Q  (− 2339.97 (20,898.30) vs. − 751.82 (5725.35),  p  &lt; 0.001), ∆ R  (23.80 [41.70] vs. 7.07 [37.50],  p  = 0.006). Independently of the varnish application, preventive care seems positively influence the root caries progress. Although within CF group the strongest effect was observed, no superiority of a specific varnish application was confirmed over a 12-months QLF observation period. Extra topical fluoride can help remineralise dentin lesions and QLF can be used as a measurement method to determine changes in the dentin lesions.

odontology

Arrest of root caries with an adjuvant chlorhexidine–fluoride varnish over a 12-months observation period: a QLF-analyzed, placebo-controlled, randomized, clinical trial (RCT)