Resumen Introducción: El bruxismo está definido como una actividad oral motora que consiste en el apretamiento o rechinamiento involuntario (rítmico o espasmódico no funcional) de los dientes, con una prevalencia de 5,9% a 49,6% en niños. Lo que podría contribuir a problemas clínicos asociados con la articulación temporomandibular. La asociación entre la disfunción temporomandibular (DTM) y el bruxismo en niños aún no está totalmente establecida. Objetivo: El objetivo de esta revisión de literatura es recopilar información actualizada de estudios que hayan abordado la asociación entre el bruxismo y la disfunción temporomandibular en niños de 3 a 12 años. Metodología: Se realizó una búsqueda en las bases de datos de Scopus, Pubmed y Scielo usando los descriptores “Niño”, “Niños”, “Preescolar”, “Bruxismo”, “Bruxismo del sueño”, “Disfunción Temporomandibular”; y, “Síndrome de la Disfunción de Articulación Temporomandibular”. Fueron incluidos artículos publicados en los últimos 15 años en idiomas español, inglés y portugués. Fueron incluidos estudios transversales, de cohorte, casos controles y ensayos clínicos aleatorizados. Resultados: Se evaluaron 242 artículos, de los cuales solo 11 fueron incluidos de acuerdo a los criterios de inclusión. Entre los estudios incluidos, dos de ellos no encontraron asociación entre DTM y bruxismo, tres encontraron una tendencia o probable asociación y seis encontraron una asociación positiva. Conclusiones: Existen estudios que relatan asociación entre el bruxismo y las disfunciones temporomandibulares en niños de 3 a 12 años, relacionando la presencia de signos y síntomas de la DTM con el bruxismo, pudiendo ser este último, un factor de riesgo para la presencia de DTM.

ABSTRACT Introduction: Bruxism is defined as an oral motor activity that consists of involuntary clenching or grinding (non-functional rhythmic or spasmodic) of the teeth, with a prevalence rate ranging from 5.9% to 49.6% in children, which could contribute to clinical problems associated with the temporomandibular joint. The association between bruxism in children and temporomandibular dysfunction (TMD) is not yet fully established. Objective: The objective of this literature review is to collect up-to-date information on studies that have addressed the association between bruxism and temporomandibular dysfunction in children ranging 3 - 12 years of age. Methods: A search was performed in the Scopus, PubMed and SciELO databases using the descriptors “Child”, “Children”, “Child, Preschool”, “Bruxism”, “Sleep Bruxism”, “Temporomandibular Dysfunction” and “Temporomandibular Joint Dysfunction Syndrome.” Articles published in the last 15 years in the Spanish, English and Portuguese languages were included. Results: A total of seventy-two articles were assessed. Only 11 articles were included according to the inclusion criteria. Among the included studies, two of them found no association between TMD and bruxism, three found a trend or probable association, and six found a positive association. Conclusion: There are studies that report an association between bruxism and temporomandibular dysfunctions in children ranging 3 - 12 years old, relating the presence of signs and symptoms of TMD with bruxism.

Abstract To assess the impact of oral conditions on the oral health-related quality of life (OHRQoL) of pediatric liver transplant candidates. This cross-sectional study included 60 children aged 13 to 48 months who were liver transplant candidates that attended the AC Camargo Cancer Center, São Paulo, Brazil. On the day of oral examinations, the children’s mothers were invited to answer two questionnaires; one related to children’s OHRQoL using the B-ECOHIS and another related to socioeconomic/demographic characteristics. Thereafter, a single, adequately trained dentist carried out children’s oral examinations for gingival inflammation (Silness-Löe index), dental plaque (Green-Vermillion Simplified index), dental caries (dmft index), developmental defects of enamel (DDE index), tooth discoloration, oral mucosal/lip alterations. The data collected also included socioeconomic/demographic characteristics and liver disease. The adjusted Poisson regression model was used to associate children’s socioeconomic/demographic characteristics and clinical conditions to the outcome. The adjusted regression model showed that children with untreated caries lesions (RR = 3.35, p < 0.0001) and tooth discoloration (RR = 1.74, p = 0.04) had poorer total B-ECOHIS scores. Dental discoloration and untreated caries lesions had a negative impact on the OHRQoL in pediatric liver transplant candidates.

Abstract The aim of this study was to assess the clinical and socioeconomic indicators associated with dental anxiety in preschool children with severe dental caries. A total of 100 children between 3 and 5 years of age were selected during a dental screening procedure. The selection criteria were having at least one tooth with dental caries and a visible pulpal involvement, ulceration, fistula, and abscess (PUFA) index of ≥1 in primary teeth. Before the clinical examination or any treatment procedure was performed, we evaluated the children’s dental anxiety using the Facial Image Scale (FIS). Parents completed a questionnaire on socioeconomic conditions, which included the family structure, number of siblings, parental level of education, and family income. A dentist blinded to FIS and socioeconomic data performed the clinical examination. Poisson regressions associate clinical and socioeconomic conditions with the outcome. Most of the children (53%) experienced extensive dental caries (dmf-t ≥ 6), and all children had severe caries lesions, with a PUFA index of ≥1 in 41% and that of ≥2 in 59%. The multivariate adjusted model showed that older children (4–5-year old) experienced lower dental anxiety levels compared with younger children (3-year old) (RR = 0.35; 95%CI: 0.17–0.72 and RR = 0.18; 95%CI: 0.04–0.76, respectively), and children with three or more siblings were associated with higher levels of dental anxiety (RR = 2.27; 95%CI: 1.06–4.87). Older age is associated with low dental anxiety, and more number of siblings is associated with high dental anxiety in preschool children, whereas the severity or extent of dental caries is not associated with dental anxiety.