ies in this population. This study investigated the progression of incisal tooth wear clinically for 4-years, using various diagnostic methods. Effectiveness of occlusal splints (night guards) for patients with nocturnal bruxism was also evaluated. Forty maxillary incisors from 10 patients with nocturnal bruxism were selected. Group 1 (n=5) wore occlusal splints for 6 months, whereas group 2 (n=5) didn't. Ultrasound, cast-model analysis (control), digital radiography, FluoreCam and colorimeter were used for measurements. Clinical progression of incisal wear monitored at baseline, 3, 6, 12, 24 and 48 months, respectively. Ultrasound, cast-model analysis and FluoreCam readings gradually and statistically significantly decreased during the overall evaluation period for both groups (p<0.001). Regarding colorimeter, statistically significant differences in periodical measurements were observed from 24 months and 12 months, for group 1 and group 2, respectively (p<0.001). There were no statistically significant differences in y have a potential preventive effect for progressive tooth wear. Ultrasound, FluoreCam and colorimeter showed promising results for monitoring any change and progression of incisal tooth wear clinically. Ultrasound might be considered as a quantitative, reliable and repeatable method. Precision of the measurements varied among the diagnostic methods used. Occlusal splints may have a potential preventive effect for progressive tooth wear. To investigate dentin abrasivity and cleaning efficacy of novel/alternative toothpastes containing diamond particles, active carbon, sea salt or organic oils. Seventy-two bovine dentin samples (for measuring abrasivity) and 60 human dentin samples (for assessing cleaning efficacy) were used in this study. Samples were divided into six groups as follows group 1 Elmex Kariesschutz (hydrated silica); group 2 Lavera Neutral Zahngel (sea salt); group 3 Curaprox Black is White (active carbon); group 4 Swiss Smile Diamond Glow (diamond powder); group 5 Ringana Fresh Tooth Oil (hydrated silica); and group 6 artificial saliva. Samples were brushed for a total of 26 min at 120 strokes/min, replacing slurries (1 part respective toothpaste and 2 parts artificial saliva) every 2 min. Finally, abrasive dentin wear was measured profilometrically and cleaning efficacy planimetrically. The highest abrasivity values were observed for Lavera Neutral Zahngel (sea salt 9.2 µm) and Elmex Kariesschutz group (hydrated silica 6.0 µm). The lowest abrasivity value was observed for Ringana Fresh Tooth Oil group (hydrated silica 1.3 µm). The highest cleaning efficacy was observed for Elmex Kariesschutz group (86.7%) and the lowest cleaning efficacy was observed for Ringana Fresh Tooth Oil group (31.3%). The addition of diamond powder or active carbon to toothpastes could offer high cleaning efficacy with low dentin abrasivity. The addition of sea salt to traditional abrasives might cause high abrasive dentin wear without adding further cleaning benefit. The addition of diamond powder or active carbon to toothpastes could offer high cleaning efficacy with low dentin abrasivity. The addition of sea salt to traditional abrasives might cause high abrasive dentin wear without adding further cleaning benefit. Investigate dental trauma among adolescents aged 15-19 years and associated factors. The study was conducted in Recife, Brazil and the sample comprised 1485 adolescents of both sexes. The data was collected by clinical examination and interviews were conducted in-between classes by a single trained assessor. Two questionnaires (AUDIT and ASSIT 2.0) were used to investigate the involvement of adolescents with alcohol, tobacco and illicit drugs. The classification proposed by Andreasen was used to identify dental injuries. The sample size was calculated using 95% interval level. Pearson's chi-square test and Fisher's exact test were used to confirm the association between the variables. The prevalence of dental injuries was 17.8%. The main causes of trauma were playing with others (20.8%) and falls (25.4%). A statistically significant percentage of adolescents reported using illicit drugs (13.9%), 15.9% used tobacco and 56.8% used alcoholic beverages. However, no statistically significant difference between the consumption of this drugs and dental injuries (p >0.005) was found. The prevalence of dental trauma in adolescents was high, with no association with drugs use. The prevalence of dental trauma in adolescents was high, with no association with drugs use. To evaluate the effects of stomach and duodenal fluid on enamel surfaces, simulating the action of refluxed liquid in patients with duodenogastric reflux. Forty bovine incisors were used to obtain enamel fragments. Only half of the enamel surface was exposed to erosive challenges; the samples were then randomly divided into the following four groups (n = 10) G1 HCl; G2 HCl + pepsin; G3 HCl + ox bile + NaHCO3; and G4 HCl + pancreatin + NaHCO3. The specimens were placed in 37°C solutions, six times per day, for 20 s, over a period of 5 days and then analysed for morphology, surface roughness and the step formed on the dental enamel using confocal laser microscopy. The data were analysed using the Kruskal-Wallis and Dunn's test (p <0.05). Both analyses revealed a higher step and surface roughness for the G3 group (5.6 μm ± 1.69, 2.2 μm ± 1.61), which were statistically significant compared with the G1 and G2 groups (3.9 μm ± 1.5 μm; 1.0 μm ± 0.18; 3.7 μm ± 1.45; and 0.9 μm ± 0.12) (p <0.05); only the step in the G4 group (4.9 μm ± 1.8 μm) was similar to that of the G3 group (p >0.05). Morphological analysis showed greater structural loss in the G3 and G4 groups. Bile and pancreatin, in combination with hydrochloric acid, may promote a greater loss of structure, increased surface roughness and loss of enamel prismatic anatomy. Bile and pancreatin, in combination with hydrochloric acid, may promote a greater loss of structure, increased surface roughness and loss of enamel prismatic anatomy. Few longitudinal studies on changes of decayed, missing, or filled teeth (DMFT) counts in a population have been reported. This study aimed to evaluate the changes in DMFT counts in Ljubljana citizens in a 30-year period. 238 dentate subjects that attended the third epidemiological study were invited. Ninety 45-95-year-old subjects (37.8%) responded to our invitation. Two (2.2%) edentulous subjects were excluded. Among the dentate subjects there were 28 men and 60 women. They were divided in six age groups with mean age of 45, 55, 65, 75, 85, and 95 years. The number of subjects in each age group was 29, 12, 21, 18, 7, and 1, respectively. For evaluation of the state of teeth we used the DMFT index. The average DMFT value for 45-95-year-old population was 19.3. https://www.selleckchem.com/products/gsk-3008348-hydrochloride.html Mean DMFT counts in all comparable age groups (45-, 55- and 65-years) decreased in 30 years. In 45 year olds they decreased from 17.5 to 15.7, in 55-year-olds they decreased from 20.4 to 19.2, and in 65 year olds they decreased from 22.5 to 20.7.