Influence of life-style factors, including second-hand smoke, on dental caries among 3-year-old children in Wuxi, China

Passive Smoking and Oral Health of Infants, Preschoolers, and Children: A Systematic Review

INTRODUCTION

Almost half of the world's children experience passive smoking, which is linked to numerous oral health conditions. The aim is to synthesize data on the impact of passive smoking on oral health of infants, preschoolers, and children.

AIMS AND METHODS

A search was conducted across Medline (via EBSCOhost), PubMed, and Scopus up to February 2023. Risk of bias was assessed according to the Newcastle-Ottawa Scale (NOS).

RESULTS

The initial search produced 1221 records and after removal of duplicates, screening by title and abstract, and full-text assessment, 25 studies were eligible for review and data extraction. The majority of studies (94.4%) found a correlation between passive smoking and increased prevalence of dental caries with three studies suggesting a dose-response relationship. Prenatal passive smoking exposure in 81.8% of studies indicated an increased dental caries experience compared to postnatal exposure. Low parental education, socioeconomic status, dietary habits, oral hygiene, and gender affected the level of environmental tobacco smoke (ETS) exposure and dental caries risk.

CONCLUSIONS

The results of this systematic review strongly suggest a significant association between dental caries in the deciduous dentition and passive smoking. Early intervention and education on the effects of passive smoking on infants and children will allow for the improvement in oral health outcomes and reduction in smoking-associated systemic conditions. The results justify all health professionals paying more attention to passive smoking when conducting pediatric patient histories, contributing to improved diagnosis and appropriate treatment planning with more suitable follow-up schedules.

IMPLICATIONS

The evidence from this review that environmental tobacco smoke and passive smoking is a risk factor for oral health conditions, both prenatally and postnatally during early childhood, justifies all health professionals paying more attention to passive smoking when conducting pediatric patient histories. Early intervention and appropriate parental education regarding the effects of secondhand smoke on infants and children will allow for the minimization of dental caries, improvement in oral health outcomes and overall reduction in smoking-associated systemic conditions for the children exposed.

Dental caries severity and oral health-related quality-of-life in Brazilian preschool children

The impact of dental caries on oral health-related quality-of-life (OHRQoL) may be influenced by disease severity. This study evaluated the impact of caries severity on OHRQoL in preschool children. A school-based, cross-sectional study was conducted with 205 children (aged 2-5 years) in Southern Brazil. Parents answered the Brazilian version of the Early Childhood Oral Health Impact Scale (B-ECOHIS) and provided sociodemographic information. The Caries Assessment Spectrum and Treatment criteria were used to evaluate caries severity, and Poisson regression with robust variance estimation conducted to determine the rate ratio (RR) and 95% confidence intervals (CIs) of the mean OHRQoL scores according to severity level. Most children had at least one tooth in the morbidity (37%) or pre-morbidity (35%) stages, and the prevalence of impacts on OHRQoL was 40%. Caries severity was associated with the impact scores: after adjustments, the mean B-ECOHIS scores were 6.31 (95% CI: 4.24-9.38) higher for children in the morbidity stage, and 10.84 (95% CI: 6.51-18.05) higher in the severe morbidity stage, than for healthy children [RR = 10.84 (95% CI: 6.51-18.05)]. Children with carious lesions into dentine or with pulpally-involved or abscessed teeth had poorer OHRQoL than children without such lesions.