The main aim of this cross-sectional study was to investigate the prevalence and severity of erosive tooth wear and its association with dental caries and socio-demographic factors among middle-aged Finnish adults. Of the total Northern Finland Birth Cohort 1966 (n = 12,058), a convenience sample (n = 3181 adults) was invited for an oral health examination of which 1962 (61.7 %) participated, comprising the final study group. Clinical examinations were carried out by trained and calibrated dentists. Erosive tooth wear was assessed by sextants using the Basic Erosive Wear Examination Index (BEWE, 0–18) and dental caries at surface level using the ICDAS criteria (0–6). Socio-demographic data were obtained from a postal questionnaire. A logistic regression model was generated to test the association of the variables. The prevalence of erosive tooth wear was 75 % and the mean of the BEWE sum score was 3.4 (SD 3.30). Almost half of the members needed non-invasive or invasive measures to prevent further progression of the condition. Of those with erosive lesions, 14.6 % suffered from severe erosive tooth wear. There was a strong positive relationship between the presence of severe erosive tooth wear (BEWE sum score ≥9) and male gender and restorative treatment need. Erosive tooth wear is a common finding in Finnish adult population; almost one in ten suffer from severe erosive tooth wear. Restorative treatment need seems to be associated with severe erosive tooth wear.

The Northern Finland 1966 birth cohort (NFBC 1966) is an epidemiological study where the participants have been controlled since pregnancy both in field tests and using questionnaires. This study aimed to evaluate cross-sectionally the association of self-reported oral symptoms (dental caries and bleeding of gums) with sociodemographic and health behavior factors among the subjects. Of the 11,541 original members of the cohort, 8,690 (75%) responded to the questionnaire on oral health (dental decay, gingival bleeding and self-estimated dental treatment need) and sociodemographic factors, general health and health behavior. Cross-tabulation and chi-squared tests as well as multiple logistic regression analysis were used to analyze the association between the outcome and explanatory variables. The study group was equally distributed between the genders. One third of the subjects reported having dental decay, one fourth gingival bleeding and a half a dental treatment need. As compared to women, men reported significantly more frequently symptoms (p < 0.05). Logistic regression analysis revealed low tooth brushing frequency increasing the odds most for all oral symptoms ((OR 1.57 (1.39–1.78) for dental decay, 1.94 (1.68-2.24) for gingival bleeding and 1.42 (1.26-1.61) for dental treatment need). Frequent smoking was associated with dental decay (OR 1.63 (1.44–1.84)) and treatment need OR (1.39 (1.23–1.56)), whereas poor general health (OR 1.71 (1.48–1.96)) and high BMI (OR 1.19 (1.03–1.36)) both were associated with gingival bleeding. Males with single marital status, BMI over 25, poor general health and poor oral health behaviors are at risk for self-reported poor oral health and dental treatment need.

The aim of this study was to evaluate the surface roughness of fixed prosthodontic materials after polishing or roughening with a stainless steel curette or ultrasonic scaler and to examine the effect of these on Streptococcus mutans adhesion and biofilm accumulation. Thirty specimens (10 × 10 × 3 mm³) of zirconia (Zr), pressed lithium disilicate (LDS-Press), milled lithium disilicate glazed (LDS-Glaze), titanium grade V (Ti) and cobalt-chromium (CoCr) were divided into three groups (n = 10) according to surface treatment: polished (C), roughened with stainless steel curette (SC), roughened with ultrasonic scaler (US). Surface roughness values (Sa, Sq) were measured with a spinning disc confocal microscope, and contact angles and surface free energy (SFE) were measured with a contact angle meter. The specimens were covered with sterilized human saliva and immersed into Streptococcus mutans suspensions for bacterial adhesion. The biofilm was allowed to form for 24 h. Sa values were in the range of 0.008–0.139 µm depending on the material and surface treatment. Curette and ultrasonic scaling increased the surface roughness in LDS-Glaze (p < 0.05), Ti (p < 0.01) and CoCr (p < 0.001), however, surface roughness did not affect bacterial adhesion. Zr C and US had a higher bacterial adhesion percentage compared to LDS-Glaze C and US (p = 0.03). There were no differences between study materials in terms of biofilm accumulation.

The aim of this pilot study was to investigate the acceptability of an oral health-related mobile application developed for young children based on the feedback given by the children and their parents. Another aim was to evaluate the self-reported change in children’s oral health behaviors during a short test period. The application—a virtual pet integrated into a child’s daily routines—aimed to promote oral hygiene and dietary behaviors in children. A total of 36 4–12-year-old voluntary children were given a mobile phone with the installed application. After the 5-week testing period, the feasibility of the application and possible changes in the children’s oral health behaviors were asked using an electronic questionnaire. Most of the children considered the application clear (n = 34), amusing (n = 31), and useful (n = 29). The children’s tooth brushing manners improved both qualitatively and quantitatively: the time used for tooth brushing increased and the children learned how to brush different tooth surfaces. Mobile applications can be fun and useful in oral health promotion; while playing, children can learn good oral health-related behaviors. Mobile applications integrate oral health promotion into children’s daily environment and routines.

Background: The number of asylum seekers and immigrants arriving in European countries is growing explosively. The aim of this pilot study was to investigate self-reported oral health, oral health habits, dental fear and use of dental health care services among asylum seekers and immigrants in Finland. Methods: The interview study carried out in 2012 comprised 38 participants (18 males and 20 females) from 15 different countries, nine of whom were asylum seekers and 29 immigrants. The youngest participant was 17 and the oldest 53 years old. Each interview took approximately 30 min. Results: The participants reported high need for dental treatment. Compared with the immigrants, the asylum seekers reported significantly more frequently dental pain and other symptoms and were less satisfied both in getting a dental appointment and in the quality of treatment they had received. All the asylum seekers and almost half of the immigrants found it difficult to get an appointment. The immigrants were more aware of good oral health habits than the asylum seekers. The asylum seekers suffered from dental fear more often than the immigrants. Conclusion: Despite the small number of participants, our interview-based study indicates that asylum seekers and immigrants have need for acute and basic dental treatment and health education.