Impact of the COVID-19 lockdown on the oral health behaviour of young children.

AIM: Children up to the age of 10 are dependant primarily on their caregivers for oral care; COVID-19 lockdowns may have disrupted this care. We therefore assessed whether the COVID-19 lockdown affected routine parental oral care for their children. METHODS: A short online survey regarding oral health behaviour and changes in the home setting during the COVID-19 lockdown was emailed to parents (n = 782, response 15%) participating in an existing study 'Healthy Teeth All Aboard (HTAA)'. RESULTS: During the lockdown, 29% of parents reported that they skipped their children's toothbrushing more often than before the lockdown, and 49% of the children were allowed to consume sugary snacks or drinks more often. These behaviours were not significantly associated with socio-economic status, country of birth of the mother, work situation of the parents, school attendance patterns or HTAA participation status. CONCLUSION: The COVID-19 lockdown affected the daily oral hygiene routines of children, potentially increasing caries risk. CLINICAL RELEVANCE: Dental professionals should be aware of the potential impacts on oral health in children in the circumstance of a new lockdown. Parents should be made aware of the oral health consequences of a lockdown.

Referral from well-child care clinics to dental clinics leads to earlier initiation of preventive dental visits: A quasi-experimental study.

BACKGROUND: An ealy first preventive dental visit for children is recommended no later than twelve months. However, still many children have their first dental visit relatively late. AIM: To evaluate whether active or passive referral by a well-child care (WCC) physician of babies for a first preventive dental visit leads to earlier initiation of dental care. DESIGN: From WCC clinics in two Dutch regions, 629 parents of babies participated. Parents received an active referral from a WCC physician for a dental visit for their babies (n = 204) or received care as usual (CAU) (n = 136) in one region and a passive referral (n = 143) or CAU (n = 146) in the other region. Active referral involved parents receiving a scheduled appointment at the dental practice, and passive referral involved parents making an appointment themselves. During the WCC visit, parents completed a baseline questionnaire. At age 2.5 years, parents received a follow-up questionnaire about dental attendance. RESULTS: Of the active referral intervention group, 59.3% had their first preventive dental visit in their first year compared with 3.7% in the CAU group (p < .001); for the passive referral group, 46.9% compared with 9.6% (p < .001). CONCLUSION: Referral of babies by WCC for their first preventive dental visit leads to earlier initiation of dental care. An active referral had a larger effect than passive referral.

Long-term effects of a community-based oral health intervention for young children in the Netherlands: A 5-year follow-up.

OBJECTIVES: The aim of this study was to assess whether referral of parents of 6 months old children by a well-child care (WCC) clinic medical practitioner for an early first dental visit combined with the Non Operative Caries Treatment and Prevention (NOCTP) approach in dental practices was effective to maintain oral health in children. METHODS: The study was conducted as a quasi-experimental comparative pre-post trial with a baseline measurement before the intervention. In total 1347 children were allocated at the age of 6 months and 306 children (intervention group: n = 166; care as usual (CAU) group: n = 140) underwent an oral examination at 5 years of age and their parents completed a questionnaire. Nonparametric tests and Hurdle models were used to determine differences in caries experience between the intervention and CAU groups. RESULTS: Children in the intervention group had significantly lower caries experience (d1,2,3 mfs) than children in the CAU group (Median = 2 vs. 5, r = .15, p < .01). Children in the intervention group had significantly fewer inactive caries lesions compared with children in the CAU group (Median = 2 vs. 3, r = .18, p < .001). No differences were found for dentin caries experience and also no differences for active caries lesions. CONCLUSIONS: Referral of parents of newborns for a preventive first dental visit by a WCC medical practitioner combined with NOCTP in dental practices may offer a new opportunity to reduce enamel caries lesions in young children.

A Qualitative Evaluation of the Implementation of an Oral Care Program in Home Care Nursing.

An Oral Care Program (OCP) was implemented in home care nursing teams in a northern province of the Netherlands to improve the oral health and hygiene of older people who make use of formal home care in 2018-2019. The aim of the current study was to evaluate the experiences of the stakeholders involved (older people, home-care nurses and dental hygienists) and to report the experienced impact of OCP, with a qualitative approach. Three dental hygienists, nine home care nurses, and eight older people were interviewed with semi-structured interviews, which were audio recorded, transcribed and analyzed using thematic analysis. The codes derived were grouped into nine main themes. OCP was experienced as mostly positive by all stakeholders involved. The educational part lead to more awareness towards oral care, but should be repeated regularly. Personalized oral care plans for older people were experienced positively, however, obtaining oral care behavior changes appeared to be difficult. Collaboration between dental hygienists and home care nurses lead to a positive experience from both sides The method and intensity of collaboration varied between the teams. To provide better access to oral health care for older people in the community, a long term collaboration between home care nursing teams and dental care professionals in their working area should be established.

Dental caries in a Norwegian adult population, the HUNT4 oral health study; prevalence, distribution and 45-year trends.

OBJECTIVE: To investigate dental caries prevalence amongst adults in Central Norway and assess changes over the last 45 years. MATERIALS AND METHODS: The cross-sectional HUNT4 Oral Health Study was conducted in 2017-2019. A random sample of 4913 participants aged ≥19 years answered questionnaires and underwent clinical and radiographic examinations. Data were compared to findings from previous studies in the same region conducted from 1973 to 2006. RESULTS: Mean number of decayed, missing and filled teeth (D3-5MFT) was 14.9 (95% CI 14.7, 15.1), 56% of adults had one or more carious teeth (D3-5T) and 11.8% had ≥4 D3-5T, with the mean number of 1.4 (95% CI 1.32, 1.42). For initial caries, mean D1-2S was 3.8 (95% CI 3.7, 3.9), being the highest for 19-24-year-olds at 8.6 (95% CI 7.9, 9.3). Comparisons with earlier studies showed a decline in mean D3-5MFT for 35-44-year-olds from 26.5 in 1973 to 10.8 in 2019. In 1973, 4.8% of 35-44-year-olds were edentulous, while in present study edentulousness was found only in individuals >65 years. CONCLUSIONS: Despite a substantial reduction in caries experience over the last 45 years, untreated dentine caries was common, evenly distributed across all age groups. Initial caries particularly affected younger individuals, indicating a need to evaluate prevention strategies and access to dental services.

Determinants and barriers for visiting a dental clinic among (frail) older individuals.

AIMS: With increasing age, the proportion of older individuals visiting a dental clinic decreases. The aim was to gain insight into a) whether frailty or dental status were associated with visiting a dental clinic and b) their perceived barriers to accessing oral health care. METHODS: Individuals eligible for the yearly influenza vaccination in Winschoten, The Netherlands, were invited to participate in a questionnaire survey about dental visits and perceived barriers to such visits. RESULTS: A total of 1027 individuals aged 60+ completed the questionnaire - 80% of the non-frail, 71% of the mildly frail and 60% of the moderately to severe frail individuals visited a dental clinic in the previous year. Dental status was the crucial determinant for not visiting a dental clinic. Edentate individuals were more likely to drop out of the dental care system than dentate individuals or individuals with partial prostheses. A higher proportion of moderately and severe frail people were edentate than non-frail or mildly frail people. Barriers to visiting a dentist were making an appointment, costs, and services available. Conclusions: Dental clinicians should pay attention to the barriers that they can influence. The influenza vaccination seems to be an interesting momentum for identifying people who have dropped out of the oral healthcare system.

Evaluation of an Oral Care Program to Improve the Oral Health of Home-Dwelling Older People.

The aim of this study was to evaluate the impact of the implementation of an Oral Care Program on home care nurses' attitudes and knowledge about oral health (care) and the impact on older people's oral health. A pre-post study, without a control group, was conducted. A preventive Oral Care Program (OCP) was designed, focusing on home care nurses and older people, in collaboration with dental hygienists. Implementation was measured with questionnaires at baseline and after 6 months for home care nurses; for older people, implementation was measured at baseline and after 3 months with the Oral Health Assessment Tool and a questionnaire about oral (self) care between January 2018 and September 2019. Although the study design has limitations, the oral health of older people improved significantly after 3 months and the OCP was most beneficial for people with full dentures. The OCP improved knowledge and attitude of home care nurses. The program fitted well with the daily work routines of home care nurses. Individual-centered care plans for older people, education of home care nurses and the expertise of the dental hygienists have added value in home care nursing. Future implementations should focus on older people with natural teeth.

Validity of data collection methods for time spent, professional involvement and treatment volume for the purpose of cost-effectiveness studies in dentistry.

OBJECTIVES: Economic evaluations can support provision of adequate and affordable oral care, requiring valid information on costs. The aim was to assess the validity of (a) patients' self-report (PS) and routine electronic patient records (EPR) regarding time spent per visit and (b) PS regarding types of treatment and type of dental professionals involved. METHODS: Data were collected in four dental clinics regarding time spent using PS and EPR, on types of treatment and dental professionals involved using PS. As reference standard for time spent, independent research assistants (RA) collected data on time per visit using stopwatches. As reference standard for types of treatment and of dental professionals involved, we used the dental clinic's Electronic Patient Files (DEPF). The two one-sided tests (TOST) equivalence procedure for the difference between paired means for time and kappa statistics for treatment and professional were used to assess agreement of data collection methods with the reference standards. RESULTS: Equivalence and agreement was good between (a) PS and RA registration concerning waiting time, appointment time and total time spent and (b) EPR and DEPF concerning appointment time. Agreement between PS and DEPF concerning types of treatment was moderate to fair (kappa values between 0.49 and 0.56 for preventive consultation, restoration, radiographs and extractions and between 0.15 and 0.26 for fluoride applications and sealants). Agreement between PS and DEPF for dental professional involved was fair (kappa = 0.41). CONCLUSIONS: Data collection regarding time using PS and EPR was valid. Data collection via PS on treatment and professionals involved were not sufficiently valid and should occur via DEPF.

Oral health-related quality of life in patients with Parkinson's disease.

BACKGROUND: Parkinson's disease (PD) is a neurodegenerative condition affecting the quality of life. Due to a worsening of oral health in PD patients with the progression of the disease, oral health-related quality of life (OHRQoL) could be impaired as well. OBJECTIVES: To assess whether PD patients in The Netherlands experience worse OHRQoL than historical controls, and to investigate which factors are associated with OHRQoL in PD patients. MATERIALS & METHODS: In total, 341 PD patients (65.5 ± 8.4 years) and 411 historical controls (62.6 ± 5.3 years) participated. Both groups completed a questionnaire. The PD patients were asked questions regarding demographics, PD, oral health, and OHRQoL. The historical controls filled in demographic information and questions regarding OHRQoL. The latter construct was assessed using the Dutch 14-item version of the Oral Health Impact Profile (OHIP-14). Data were analysed using independent samples t-tests and univariate and multivariate linear regression analysis. RESULTS: The mean OHIP-14 score was higher in PD patients (19.1 ± 6.7) than in historical controls (16.5 ± 4.4) (t(239) = 6.5; p < .001). OHRQoL in PD patients was statistically significant associated with motor aspects of experiences of daily living (B = 0.31; t(315) = 7.03; p < .001), worsening of the oral environment during disease course (B = 3.39; t(315) = 4.21; p < .001), being dentate (B = -5.60; t(315) = -4.5; p < .001), tooth wear (B = 2.25; t(315) = 3.29; p = .001), and possible burning mouth syndrome (B = 5.87; t(315) = 2.87; p = .004). CONCLUSION: PD patients had a lower OHRQoL than historical controls. Besides, PD-related variables and oral health-related variables were associated with OHRQoL.

Periodontal breakdown inter-tooth relationships in estimating periodontitis-related tooth loss.

OBJECTIVES: The reasons for tooth extraction are rarely recorded in epidemiological datasets. It poses a diagnostic challenge to determine if tooth loss is related to periodontal disease (TLPD). The present study aimed to assess the inter-tooth relationships based on the periodontal characteristics of existing teeth. METHODS: A cross-sectional dataset of 8,978 participants with complete periodontal examination (including probing pocket depth [PPD] and clinical attachment loss [CAL]) in the NHANES 2009-2014 was used in this study. Spearman rank correlation was applied to assess the inter-tooth correlations of PPD/CAL among 28 teeth after adjustment for relevant confounders. We further verify our findings in the Java Project on Periodontal Disease with TLPD information available (the number of TLPD = 12). RESULTS: Strong PPD/CAL correlations were observed in adjacent teeth (r for PPD = 0.652, r for CAL = 0.597; false discovery rate [FDR] <0.05) rather than those on non-adjacent teeth (r for PPD = 0.515, r for CAL = 0.476; FDR <0.05). The correlations increased among severe periodontitis cases (CAL ≥5 mm or PPD ≥6 mm). In line with this, we further observed that the teeth adjacent to the TLPD tooth had the most alveolar bone loss in the Java dataset. CONCLUSION: The periodontitis parameters (PPD/CAL) of adjacent teeth could be a potential indicator to estimate TLPD when actual reasons for tooth extraction are unknown. CLINICAL SIGNIFICANCE: Periodontally compromised teeth adjacent to a lost tooth may help estimate whether the loss could be related to periodontal disease when the actual extraction reasons are unknown.

Trends in socioeconomic inequality of periodontal health status among Dutch adults: a repeated cross-sectional analysis over two decades.

BACKGROUND: Studies exclusively focusing on trends in socioeconomic inequality of oral health status in industrialized countries are relatively sparse. This study aimed to assess possible differences in oral hygiene and periodontal status among people of different socioeconomic status (SES) in the Netherlands over two decades. METHODS: A repeated cross-sectional analysis of 3083 participants aged 25-54 years was conducted on the Dutch National Oral Health Surveys of 1995, 2002, 2007, and 2013. Plaque-free was defined according to the Simplified Oral Hygiene Index (OHI-S = 0). Periodontal status was classified in two different ways, either periodontal health/disease (probing pocket depth index [PDI] = 0/ ≥ 1) or with/without deep pockets (PDI = 2). We used the regression-based absolute and relative effect index to measure the absolute and relative socioeconomic inequalities. Multivariable logistic regressions were used to explore temporal trends in oral hygiene and periodontal status by low- and high-SES groups. RESULTS: Age-standardized percentages of individuals with plaque-free increased in the whole population from 1995 to 2013 (12.7% [95% CI 10.5-14.9] to 28.1% [24.8-31.5]). Plaque-free showed significant socioeconomic differences in absolute and relative inequalities in 2007 and 2013. Between 1995 and 2013, age-standardized percentage of periodontal health increased (from 51.4% [48.1-54.7] to 60.6% [57.0-64.1]). The significant absolute inequalities for periodontal health were seen in 2002 and 2013. The relative scale presented a similar pattern. Regarding deep pockets, there was little difference in the age-standardized overall prevalence in 1995 versus 2013 (from 6.5% [4.9-8.2] to 5.4% [3.7-7.0]). The significant absolute and relative inequalities in deep pockets prevalence were found in 1995. Yet, all interaction terms between survey year and SES did not reach significance (plaque-free: P = .198; periodontal health: P = .490; deep pockets: P = .678). CONCLUSIONS: Socioeconomic inequalities in oral hygiene and periodontal status were present in the Netherlands in the last two decades.

Dietary inflammatory potential is associated with poor periodontal health: A population-based study.

AIM: To investigate the association between dietary inflammatory potential and poor periodontal health. MATERIAL AND METHODS: A cross-sectional analysis of a nationally representative sample of participants was performed. NHANES 2011-2014 (n = 7081) and NHANES 2001-2004 (n = 5098) were used as discovery and validation datasets, respectively. The energy-adjusted dietary inflammatory index (E-DII) score was calculated for each participant based on 24-h dietary recalls to assess diet-associated inflammation. Periodontitis was defined by the CDC/AAP using clinical periodontal parameters. Natural cubic spline was applied to identify any non-linear associations of the E-DII score with moderate/severe periodontitis. Furthermore, interaction analyses were performed by age, gender, and race/ethnicity to explore the moderating roles of these factors. RESULTS: In the discovery dataset, a non-linear positive relationship with periodontitis was identified for the E-DII score (pnon-linearity  < .001) after adjustment for potential confounders. Compared with those individuals in the lowest tertile of E-DII, participants in the highest tertile who consumed a pro-inflammatory diet were 53% more likely to be periodontitis (OR tertile3vs1  = 1.53, 95% CI: 1.33-1.77). The validation dataset showed similar associations. Relatively stronger associations were seen in older adults and males. CONCLUSION: Consuming a pro-inflammatory diet indicated by the E-DII score is associated with periodontal disease in the U.S. general adult population.

The prevalence of awake bruxism and sleep bruxism in the Dutch adolescent population.

OBJECTIVES: This study aimed to assess the prevalence of awake bruxism and sleep bruxism in the Dutch adolescent population. MATERIALS AND METHODS: As part of a large epidemiologic survey on oral health of the general Dutch adolescent population in 2017, a total of 920 subjects were asked about their bruxism behaviour during daytime and during sleep. The collected data were subjected to stratified analysis by two age groups (for 17 and 23 years, respectively), gender and socio-economic status. RESULTS: A prevalence of 4.1% and 4.2% was found for awake bruxism and of 7.6% and 13.2% for sleep bruxism. Women reported awake bruxism more often than men in the 17-year-old age group (5.0% and 3.2%, respectively), while in the 23-year-old age group it was the other way around (4.0% and 4.4%, respectively). Regarding sleep bruxism, women reported higher percentages than men in both age groups (7.8% versus 7.5% and 14.9% versus 11.5%, respectively). Concerning socio-economic status (SES), awake bruxism was more often found in high SES groups (4.6% versus 3.7% and 4.9% versus 4.0% in both age groups, respectively) as well as for sleep bruxism in the 23-year-old group (16.5% versus 8.6%). In the 17-year-old group, sleep bruxism was more often reported in the low SES group (9.7% versus 5.3%). CONCLUSIONS: Sleep bruxism is a common condition in the Dutch adolescent population, while awake bruxism is rarer. CLINICAL RELEVANCE: Dental caregivers can use this information when negative healthcare outcomes are present amongst adolescents.

White Blood Cell Count Mediates the Association Between Periodontal Inflammation and Cognitive Performance Measured by Digit Symbol Substitution Test Among Older U.S. Adults.

BACKGROUND: Systemic effects of periodontal infection may increase the risk of central neuroinflammation, aggravating impaired cognition. This study aims to examine whether systemic inflammatory factors mediate the possible association between periodontal inflammation and cognitive function. METHODS: We conducted a cross-sectional analysis of 766 participants aged ≥ 60 years and who had completed periodontal and cognitive examinations in the National Health and Nutrition Examination Survey (NHANES) 2001-2002. We used multivariable linear regression to investigate the overall association between periodontal health and cognitive function as measured by the digit symbol substitution test (DSST). Bleeding on probing (BOP) and periodontal inflamed surface area (PISA) were used to assess the periodontal inflammatory activity and burden, respectively. Mediation analyses were used to test the indirect effects of the BOP/PISA on DSST via C-reactive protein, white blood cell (WBC) count, and fibrinogen. RESULTS: Participants with superior periodontal health obtained higher DSST scores than those with poorer periodontal health, adjusting for demographic factors and chronic conditions. Concerning the inflammatory activity, WBC count acted as a full mediator in the association between BOP and DSST (ß = -0.091; 95% confidence interval [CI] = -0.174 to -0.008) and mediated 27.5% of the total association. Regarding the inflammatory burden, WBC count acted as a partial mediator in the association between PISA and DSST (ß = -0.059; 95% CI = -0.087 to -0.031) and mediated 20.3% of the total association. CONCLUSION: Our study indicated the potential role of systemic inflammatory factors as a mediator of associations between periodontal inflammation and cognitive function in the U.S. geriatric population.

Experiencing Financial Strain and Clinically Assessed Caries Experience in Dentate Adults Aged 25-44 Years: An Exploration of Potential Pathways.

Large socioeconomic inequalities still exist in oral health. It is already known that oral health-related behaviour may contribute to these inequalities, but why people with a lower socioeconomic position behave less healthily is not easily understood. A possible explanation that integrates insights on health behaviour, stress, and financial resources is the pathway of behavioural responses to financial strain. The aim of this study was to assess to what extent financial strain is associated with clinically assessed caries experience in a population-based study of dentate adults, independently of other socioeconomic indicators. Furthermore, the potential mediating pathways of oral health-related behaviours (oral hygiene, dietary habits, preventive dental visits) were explored. Dentate participants, aged 25-44 years, taking part in a survey on oral health and preventive behaviour in the Netherlands in 2013 were clinically examined on - among others - caries experience (DMFS index) and level of oral hygiene (OHI-s index). Financial strain, frequency of tooth brushing, dietary habits, attendance of (preventive) dental visits in the past year, and demographic variables were assessed via questionnaires. Negative binomial hurdle models were used to study the association between financial strain and DMFS and between oral health behavioural indicators and DMFS. Although it was observed that experiencing financial strain did not seem to affect whether there is any caries experience or not, among those having any caries (DMFS >0) suffering from financial strain was associated with a higher caries prevalence, independent of educational level and income. None of the studied potential mediators could explain this association.

Oral health and oral health behaviour of adolescents with mild or borderline intellectual disabilities compared with a national representative sample of 17-year-olds in the Netherlands.

BACKGROUND: People with intellectual disabilities have worse health outcomes compared to their peers without. However, regarding oral health parameters, recent systematic reviews reported conflicting evidence. The aim was to assess whether adolescents with MBID differ from their peers in oral health and oral health behaviour. METHODS: Ninety seven adolescents with MBID participated in this comparative study. Outcomes were compared to data of 17-year-old Dutch adolescents (n = 581) from a national epidemiological study on oral health and oral health behaviour. RESULTS: Adolescents with MBID showed worse oral health outcomes and poorer oral hygiene than their peers from the general population. Furthermore, they visit the dentist less regularly, brush less frequently, eat main-dishes less frequently and have higher levels of dental anxiety. CONCLUSION: Adolescents with MBID have poorer oral health and show worse oral health-promoting behaviours than their peers in the general population. Targeted interventions to reach this vulnerable group are necessary.

Effectiveness of a short web-based film targeting parental oral health knowledge in a well-child care setting.

Young children rely on their parents with respect to oral health routines. However, parental knowledge on this topic is often insufficient. Well-child care may be an excellent route to reach parents because almost all of them attend. To evaluate the effectiveness of an 8.5 min web-based film about oral health, provided by well-child care, a non-blinded quasi-experimental study was performed. Parents attending well-child care clinics in the Netherlands were assigned to an intervention (n = 88) or control group (n = 41). The control group received care as usual. We measured parental knowledge of oral health with a questionnaire (range of scores 1-12) before and directly after the intervention, and 6 months later, and assessed differences between the intervention and the control group. Parental oral health knowledge improved after watching the film: the intervention group's mean score of 11.1 (SD 1.3) was greater than the mean score of 7.1 (SD 2.0) of the control group (Cohen's d = 2.64). Scores remained higher in the intervention group 6 months after watching the film (mean 9.1, SD 1.3) than before (Cohen's d = 1.25). A web-based educational film delivered in a well-child care setting can be an effective way to address oral health and to improve parental knowledge.

The Relationship between Caries-Specific Quality of Life and Generic Wellbeing in a Dutch Pediatric Population.

Dental caries has significant negative impacts on the lives of children and young people. Whilst the impacts on children's oral health-related quality of life (OHRQoL) have been increasingly investigated, the effect on children's overall wellbeing remains largely unknown. Data were obtained from a survey conducted across four cities in the Netherlands. Children and their parents completed a series of questionnaires, which included Dutch versions of a caries-specific pediatric measure of OHRQoL (CARIES-QC-NL) and a generic pediatric health utility measure (CHU9D-NL). The participating children underwent dental examinations to determine their caries status. A total of 486 11-year-old children participated in the study, of which 184 had caries experience (38%). The mean number of decayed, missing and filled teeth (DMFT) was 0.71. The CARIES-QC-NL was found to have statistically significant correlations with the DMFT and CHU9D-NL. There were no statistically significant correlations between the CHU9D and the clinical variables. The CARIES-QC-NL had acceptable internal consistency and construct validity in this population despite the low prevalence of active caries. A relationship was demonstrated between OHRQoL and generic wellbeing in this population. Despite this, the CHU9D did not show any correlation with the clinical data, which may limit its application in studies of the impact of dental caries.

The prevalence of awake bruxism and sleep bruxism in the Dutch adult population.

BACKGROUND: Awake bruxism and sleep bruxism are common conditions amongst adult populations, although prevalence data are scarce. OBJECTIVE: This study aimed to assess the prevalence of awake bruxism and sleep bruxism in the Dutch adult population. METHODS: As part of a large epidemiologic survey on oral health of the general Dutch adult population, a total of 1209 subjects were asked about their bruxism behaviour during the day and during their sleep. The collected data were subjected to stratified analysis by five age groups (25-34, 35-44, 45-54, 55-64 and 65-74 years), socioeconomic status, and gender. RESULTS: A prevalence of 5.0% of the total population was found for awake bruxism and of 16.5% for sleep bruxism. Regarding the five age groups, prevalence of 6.5%, 7.8%, 4.0%, 3.2% and 3.0%, respectively, were found for awake bruxism, and of 20.0%, 21.0%, 16.5%, 14.5% and 8.3%, respectively, for sleep bruxism. Women reported both awake bruxism and sleep bruxism more often than men. These differences were statistically significant. Concerning socioeconomic status (SES), both awake bruxism and sleep bruxism were more often found in high SES groups, being statistically significant for awake bruxism only. CONCLUSION: Sleep bruxism is a common condition in the Dutch adult population, while awake bruxism is rarer.

Socio-economic inequality in oral health in childhood to young adulthood, despite full dental coverage.

The aim of this cross-sectional study was to assess differences in caries experience according to socio-economic status (SES) in a health-care system with full coverage of dental costs for children up to the age of 18 yr. In 2011 and 2014, by performing hurdle negative binomial models, we obtained data on 3,022 children and young adults aged 5, 8, 11, 14, 17, 20, and 23 yr, living in four cities in the Netherlands. At all ages between 5 and 23 yr, the percentages of children with caries-free dentitions were lower and mean caries experience were higher in low-SES than in high-SES participants. In 5-yr-old children with dmft > 0, mean caries experience was 3.6 in those with low SES and 2.3 in those with high SES. In 23-yr-old participants, these estimates were 6.8 and 4.4, respectively (P < 0.05). Low-SES children have a greater risk of more caries experience than high-SES children. Thus, in a system with full free paediatric dental coverage, socio-economic inequality in caries experience still exists. Dental health professionals, well-child care doctors and nurses, general practitioners, and elementary school teachers should collaborate to promote oral health at the community level, with specific targeting of low-SES families. We further need policy measures to curtail, at community level, the increasing availability and consumption of highly processed, carbohydrate-rich foods, with particular attention for low-SES families.