Summary Background During COVID‐19 pandemic, children are confined at home, with changes in family routines. Aim Evaluate sleep disorders among Brazilian and Portuguese children during social distancing, and its association with parental perception of child’s oral hygiene. Design In this cross‐sectional study, Portuguese and Brazilian parents/caregivers of 3‐15‐year‐old children, practicing social distancing due to COVID‐19 pandemic, answered an online questionnaire, from April 24 th ‐26 th 2020, evaluating sociodemographic characteristics, child’s school activities online, child’s sleep quality during social distancing. Two questions from the questionnaire, developed based on previous studies, evaluated the parental perception of child’s oral hygiene quality and routine changes during social distancing. Parents/caregivers answered five domains of the Portuguese‐language version of the Sleep Disturbances Scale for Children, evaluating sleep–breathing disorders, disorders of arousal, sleep–wake transition disorders, disorders of excessive somnolence and sleep hyperhidrosis. Descriptive, Linear‐by‐linear association, Kruskal‐Wallis and Post‐Hoc analysis were performed ( P ≤0.05). Results Participated in the study 253 parents/caregivers, 50.2% from Brazil. Most parents (72.2%) reported changes in child’s routine during social distancing. Sleep–breathing disorders ( P =0.019), sleep–wake transition disorders ( P =0.022) and disorders of excessive somnolence ( P <0.001) were associated with poor oral hygiene during social distancing. Conclusion Sleep disorders are associated with poor oral hygiene during social distancing.

Background The most‐cited papers help to better understand important characteristics of this specific science field. Objective To analyse the 100 most‐cited papers in the field of Paediatric Dentistry. Design A search of the most‐cited papers in Paediatric Dentistry journals was performed using journals included in the category of ‘Dentistry, Oral Surgery & Medicine’ in the Thompson Reuters Web of Science citation indexing database up to December 2018. Two researchers performed the data extraction, which included: number of citations, title, authors, country, year, journals, study design, and thematic area. Results The number of citations of each paper included in the top 100 most‐cited ranged from 42 to 182 (mean: 64.51). Seven papers were cited more than 100 times. Most of the papers were published in the International Journal of Paediatric Dentistry (36%), between 2006 and 2015 (55%), with a cross‐sectional design (39%). Twenty‐six authors participated in two or more papers. The countries with the highest number of most‐cited papers were the United States (25%), Australia (11%), and Brazil (9%). Cariology was the most studied thematic area. Conclusion The evaluation of the top 100 most‐cited papers in Paediatric Dentistry journals allowed for a better understanding of the world scenario regarding this research field.

Objective: This quali-quantitative study analysed the 100 most-cited papers in core dental public health (DPH) journals focusing on understanding international knowledge production. Methods: The DPH journals were selected from titles and scopes at Web of Science Core Collection database up to March 2020. Further comparisons were performed at Scopus and Google Scholar databases. Some bibliometric parameters were extracted as follows: title, number of citations, citation density (number of citations per year), first author's country, year of publication, study design and subject. VOSviewer software was used to create graphical bibliometric maps. Results: Papers were ranked by the total number of citations, which ranged from 104 to 1,019, and six papers were cited more than 400 times. Papers were published from 1974 to 2013, mainly in Community Dentistry and Oral Epidemiology. Most frequent study designs were cross-sectional (30%) and nonsystematic review (25%). Most papers were from Europe (54%) and North America (31%). First authors were predominantly from the United Kingdom (17%), United States of America (17%) and Canada (14%). VOSviewer map of co-authorship demonstrated the existence of clusters in the research collaboration. Although epidemiology was the most frequent subject (84%), health services research presented eight times higher citation density. Conclusions: Top 100 most-cited papers in core DPH journals were predominantly observational studies from Anglo-Saxon countries. Top 100 most-cited papers in core DPH journals tend to be cross-sectional studies carried out in the United States with highest citation in health services research. Locker D, Petersen PE and Sheiham A are a landmark for DPH field. K E Y W O R D S bibliometric analysis, bibliometrics, citation index, dental public health, public health | 41 MATTOS eT Al. MATTOS eT Al. milestones for oral health in the world. Those citations pictured that dental public health investigations spread along time and beyond geographic barriers. This study is helpful for journal editors to better understand the relevance of DPH papers in the international scientific scenario. The knowledge of topics, study designs and authors more frequently cited by peers can help policymakers, clinicians and researchers choose scientific evidence for their decision-making processes.

The purpose of this study was to evaluate the association between oral health problems and oral health-related quality of life (OHRQoL) of preschool children according to both self-reports and the reports of parents/caregivers. A school-based, cross-sectional study was conducted with 769 preschool children and their parents/caregivers. The OHRQoL was evaluated using the Scale of Oral Health Outcomes for Five-Year-Old Children (SOHO-5). Based on logistic regression for complex samples, the following variables were found to be associated with poorer OHRQoL in the parent/caregiver version: toothache (OR = 6.77; 95% CI: 3.95-11.59); consequences of untreated dental caries (OR = 2.69; 95% CI: 1.27-5.70); and anterior open bite (OR = 2.01; 95% CI: 1.13-3.56). The following variables were associated with poorer OHRQoL in the child self-report version: toothache (OR = 3.34; 95% CI: 2.11-5.29); cavitated lesions (anterior teeth) (OR = 2.20; 95% CI: 1.26-3.84); occurrence of traumatic dental injury (OR = 1.77; 95% CI: 1.19-2.61); and anterior open bite (OR = 1.95; 95% CI: 1.16-3.29). We conclude that children with dental caries (or its sequelae) had poorer OHRQoL. Having experienced a traumatic dental injury and having a malocclusion were also associated with a poorer OHRQoL.

A higher monthly household income, history of toothache, the absence of TDI, and strong SOC of the parents/caretakers influence the use of dental services by preschoolers.

The aim of the present study was to determine the concentration of total fluoride (TF) and total soluble fluoride (TSF) in children's dentifrices marketed in the city of Lima, Peru. Three samples of 23 dentifrices (4 without fluoride and 19 with fluoride) were purchased in different pharmacies in Lima, Peru. The TF and TSF concentrations found in the dentifrices were determined by ion-selective electrode, expressed in ppm F (μg F/g of dentifrice). The TF concentration in the majority of the fluoride toothpastes matched that shown on the label, except for one declared as 1450 ppm F by the manufacturer, whereas only 515.1 ppm F was found. The concentration of TSF found in the fluoride toothpastes ranged from 457.5 to 1134.8 ppm F. All the dentifrices were formulated with silica, but one also presented calcium carbonate. In conclusion, 83% of the children's dentifrices marketed in Lima, Peru, were fluoridated, but only 53% contained a TSF concentration greater than 1000 ppm F, the minimum concentration required to provide an anticaries effect.

The impact of oral problems on the OHRQoL of the preschool children was high. A greater number of injured teeth, the presence of toothache, and socioeconomic factors were associated with poorer OHRQoL, based on the reports of both the parents/caregivers and the children. The occurrence of non-complicated TDI was a protective factor for OHRQoL.

The aim of the present study was to evaluate the impact of clinical oral factors, socioeconomic factors and parental sense of coherence on affected self-confidence in preschool children due to oral problems. A cross-sectional study with probabilistic sampling was conducted at public and private preschools with 769 five-year-old children and their parents/caretakers. A questionnaire addressing socio-demographic characteristics as well as the Scale of Oral Health Outcomes for Five-Year-Old Children (SOHO-5) and the Sense of Coherence Scale (SOC-13) were administered. The dependent variable was self-confidence and was determined using the SOHO-5 tool. Dental caries (ICDAS II), malocclusion and traumatic dental injury (TDI) were recorded during the clinical exam. Clinical examinations were performed by examiners who had undergone training and calibration exercises (intraexaminer agreement: 0.82-1.00 and inter-examiner agreement: 0.80-1.00). Descriptive statistics and Poisson regression analysis were performed (α=5%). Among the children, 91.3% had dental caries, 57.7% had malocclusion, 52.8% had signs of traumatic dental injury and 26.9% had bruxism. The following variables exerted a greater negative impact on the self-confidence of the preschool children due to oral problems: attending public school (PR=2.26; 95% CI: 1.09-4.68), a history of toothache (PR=4.45; 95% CI: 2.00-9.91) and weak parental sense of coherence (PR=2.27; 95% CI: 1.03-5.01). Based on the present findings, clinical variables (dental pain), socio-demographic characteristics and parental sense of coherence can exert a negative impact on self-confidence in preschool children due to oral problems.O r a l P r o b l e m s a n d S e l fConfidence in Preschool Children