BRUXISM IN PRESCHOOL CHILDREN

Reported prevalence of sleep bruxism—clenching and/or grinding of the teeth at night—varies greatly among different societies. To determine factors associated with sleep bruxism in 3-to 5-year-old children, Vieira-Andrade et al from the Federal University of Minas Gerais, Brazil, conducted a cross-sectional study of 749 patients for various malocclusions and evaluated the presence of bruxism, along with oral habits, medical history, birth information and sociodemo-graphic factors, through parental interviews; nutritional status was determined by anthropometric measures.

Bruxism was present in 103 of the preschool children (13.8%); malocclusion was present in 258 (34.4%). Biting on objects, lower arch crowding, brachyfacial type and having a mother with >8 years of school were significantly associated with sleep bruxism. In the adjusted multivariate regression, lower arch crowding (prevalence ratio [PR], 3.38; 95% confidence interval [CI], 1.9–5.7), biting on objects (PR, 2.49; 95% CI, 1.4–4.4), breastfeeding >12 months (PR, 1.98; 95% CI, 1.2–3.2) and bottle feeding for >24 months (PR, 1.93; 95% CI, 1.2–3.1) were significantly associated with sleep bruxism.

Biting on objects is a way preschool children relieve emotion and psychological stress. That may explain its connection to sleep bruxism, which has been associated with stress, anxiety, aggressiveness and hyperactivity. The greater prevalence among children breastfed 12 months may simply reflect the fact that these children tend to sleep in their parents’ bed more frequently, giving their parents more chances to observe sleep bruxism.

Vieira-Andrade RG, Drummond CL, Martins-Júnior PA, et al. Prevalence of sleep bruxism and associated factors in preschool children. Pediatr Dent 2014;36: 46-50.

ORAL HEALTH OF CHILDREN WITH CONGENITAL CARDIOVASCULAR DISEASE

Cardiovascular diseases are the leading cause of death from congenital malformations. The 3 most common congenital cardiovascular diseases are ventricular septal defect, aortic valve stenosis and coarctation of the aorta. Children with congenital cardiovascular diseases are less likely to receive quality dental care and more likely to have poorer oral health.

Many studies have noted a link between periodontal and cardiovascular diseases; some have suggested that periodontal disease is an independent risk factor for coronary disease. Children with congenital cardiovascular diseases must receive special dental care because of their susceptibility to infective endocarditis associated with dental and periodontal infections. Nosrati et al from Indiana University evaluated the gingival condition of children with congenital cardiovascular diseases to determine whether an association exists between congenital cardiovascular diseases and gingivitis and periodontal disease.
A group of 25 children aged 7 to 13 years old with congenital cardiovascular disease (6 with ventricular septal defect; 14 with aortic valve stenosis; 5 with coarctaion of the aorta, n = 5) was recruited from a pediatric cardiology department at a children’s hospital; an age- matched control group included 25 systemically healthy children. Parents completed a questionnaire about their children’s past and present systemic health status and dental health history.

Because periodontal probing may cause bacteremia and is therefore contraindicated in patients with congenital cardiovascular disease, modified techniques were used to measure the presence of gingivitis and dental plaque. Levels of recession were also measured.

The children with congenital cardiovascular disease had significantly higher scores on the modified gingival index (GI) and the modified plaque index (PI) and higher levels of recession than did the control group (Figure 1). No differences were detected among the 3 subgroups defined by type of congenital cardiovascular disease. While 20% of the children with congenital cardiovascular disease had ≥1 site with recession >0, none of the control children had any sites showing recession. The study also showed that these 25 patients and their parents had received encouragement from their pediatrician, pediatric cardiologist and parents’ dentist to arrange dental visits for the children, and the children had more recent visits to the dentist than did the control group. Nevertheless, children with congenital cardiovascular disease showed a greater incidence of periodontal disease, perhaps due to less-than-adequate oral hygiene habits. These children need to receive regular dental check-ups on a more frequent basis than do their systemically healthy peers.

Nosrati E, Eckert GJ, Kowolik MJ, et al. Gingival evaluation of the pediatric cardiac patients. Pediatr Dent 2013;35:456-62.

Maternal Taste Preferences and Early Childhood Caries Incidence

Dietary habits, especially a high daily intake of sugars, correlate with caries experience in pre-school and school-age children. A genetic component, based on the ability to taste the bitterness of the chemical 6-n-propylthiouracil (PROP), enters into certain food preferences. People with the ability to recognize PROP (known as supertasters) tend to dislike sweet tastes, preferring weaker tastes, while those who cannot recognize PROP (known as nontasters) prefer sweeter and stronger tastes.

Previous studies of children and adolescents show that nontasters have significantly more dental caries than do supertasters. However, their mothers’ food preferences may affect the decisions of what foods to offer their children. Alanzi et al from Kuwait University examined whether an association exists between mothers’ taste perceptions and their children’s early childhood caries prevalence.

The study originally included 60 children (aged 24–36 months) who presented to the pediatric clinic at the University of Maryland School of Dentistry. Their mothers were tested for PROP sensitivity; 18 mothers were nontasters, 20 were supertasters. (The children of 22 medium-taster mothers were excluded from the study.) Orally administered questionnaires recorded the moth-ers’ demographic information and oral health status, along with the children’s oral hygiene and dietary practices. Each child was examined by mouth mirror and fixed dental unit light for early childhood caries based on decayed, missing and filled surfaces (dmfs) score.

The oral examinations showed that 45% of the children (n = 17) had caries (defined as a dmfs >1). Of these children, 71% (n = 12) had mothers who were non-tasters, a statistically significant difference (p = .009). Children of nontaster mothers had significantly higher dmfs scores in their maxillary teeth than did children of supertaster mothers (p = .04; Figure 2). Children whose mothers had active dental caries had significantly higher dmfs scores than did children whose mothers did not have active dental cares (3.9 ± 5.3 vs 0.5 ± 1.2; p = .04).

Children of PROP nontaster mothers who shared a home with grandparents had significantly higher levels of caries than did similar children in homes without grandparents. This could reflect a genetic predisposition passed from generation to generation. Based on the results of this study, PROP screening for mothers may help identify children at risk for early childhood caries.

Alanzi A, Minah G, Romberg E, et al. Mothers’ taste perceptions and their preschool children’s dental caries experiences. Pediatr Dent 2013;35:510-514.