Prospective case series on possible effects of local factors on the development of halitosis in new complete denture...

To assess the development of halitosis in participants wearing new removable complete dentures (RCD).

Seventy-five completely edentulous patients receiving RCD were recruited. Halitosis was assessed by means of FitScan Breath Checker on the day of denture insertion (T0), as well as after 1 month (T1), and after 2 months (T2). Risk factors were studied using a validated questionnaire about oral and denture hygiene, and tongue scoring followed for each participant. A modified plaque scoring technique assessed the percentage of newly formed biofilms accumulated on all surfaces of the RCD.

At T0, 44% of the participants revealed halitosis. This percentage insignificantly increased at T1 (66.7%) and T2 (65.6%), respectively (P > .109). At T1, halitosis was significantly lower among persons who reported tongue brushing compared to refraining participants (14.3% vs 72.6%; P = .002). At T2, halitosis was significantly higher among patients suffering from moderate to heavy tongue coatings compared to those with no or only light coatings (83.3% vs 50.0%; P = .006), those who did wear their dentures during sleeping (77.5% vs 45.8%; P = .010), and those who did not brush their tongues at all (87.5% vs 29.2%; P < .0001). With a 16-fold increased probability (95% CI 10.0 to 23.31; P < .001), the multivariate analysis revealed that non-brushing the tongue was the only variable significantly linked to halitosis at both follow-ups.

Non-brushing of tongues as well as sleeping with dentures seems to be the main causes of halitosis in new RCD wearers.