Abstract The aim of this study was to determine the prevalence of dental trauma in schoolchildren 6 to 12 years of age and associated clinical, sociodemographic, and socioeconomic variables. A cross-sectional study was conducted in 477 children from public elementary schools in four locations in Mexico. The dependent variable was dental trauma, which was dichotomized in 0 = without dental trauma and 1 = with dental trauma. For the statistical analysis, a multivariate binary logistic regression model was generated in Stata. Average age was 9.06±1.94 years and 51.1% were girls. The prevalence of dental trauma was 18.2%. Falls, automobile accidents and sports had the highest number of instances (p < 0.01). In the multivariate model, it was observed that the risk of dental trauma increased with age (OR = 1.28) and among boys (OR = 1.45). Schoolchildren with decreased overjet (OR = 0.38) had lower dental trauma. Father’s age (OR = 1.03) and educational level (OR = 1.78) were associated with dental trauma. Schoolchildren without health insurance (OR = 0.62) presented dental trauma less often. This study provided important information regarding the association of different sociodemographic, socioeconomic and clinical variables with dental trauma in Mexican schoolchildren. Identifying factors associated with dental trauma may support health promotion opportunities to ameliorate the prevalence of dental trauma.

Abstract The aim of this study was to identify if the prevalence of dental pain (past and / or present) is associated with caries experience in Mexican children, as well as to characterize factors associated with dental pain. A cross-sectional study was conducted in a consecutive sample of 309 children 2 to 12 years old who were patients at a dental school clinic in Toluca, Mexico. Data were collected from clinical records. The dependent variable had three categories: 0 = have never had dental pain, 1 = had dental pain before the appointment, and 2 = current dental pain. Non-parametric statistical tests were used in the analysis. A multivariate multinomial logistic regression model was generated in Stata 11.0. Average age was 5.71 ± 2.43 years and 50.8% were boys. The joint dmft+DMFT index was 9.11 ± 4.19. It was observed that 56.6% of children did not report having experienced dental pain, 30.7% reported having previously had dental pain, and 12.6% had pain when the clinical appointment took place. In the multivariate model, variables associated (p < .05) with previous dental pain were age (OR = 1.13); the dmft + DMFT index (OR = 1.13), having had a last dental visit for curative/emergency reasons (OR = 2.41) and prior experience of dental trauma (OR = 2.59). For current pain, only the joint dmft + DMFT index (OR = 1.10, p < 0.05) had significant associations. Almost half of the children had experienced dental pain in their lifetime. Since caries experience is a factor associated with dental pain, decreasing caries levels may ameliorate suffering from dental pain in children.

ABSTRACT Introduction: Hyperdontia is a number anomaly in which teeth or structures similar to teeth are formed in excess of the normal amount, resulting in supernumerary dental organs. Case presentation: a male patient 7 years 11 months of age with mixed dentition and delayed eruption of the central and upper lateral incisors presented for evaluation. The panoramic radiograph showed a radiopaque area between the permanent upper central incisor (OD 21) and the permanent upper lateral incisor (OD 22). A supernumerary tooth was diagnosed. With the help of an occlusal and a periapical radiograph of the area, the tooth was evaluated and an extraction under local anesthesia was planned. The surgery was performed without complications and the patient was referred to the orthodontic clinic. Conclusions: In the present report, we note that time intervention and with the help of radiographic studies, a significant result can be achieved without damaging the patient’s future oral integrity. Early diagnosis can be improved with the help of the various types of radiographs available in dentistry, thus avoiding complications in infants.

RESUMEN Introducción: La hiperdoncia, es una anomalía de número en la que se forman dientes o estructuras parecidas a dientes en exceso con respecto a la cantidad normal, teniendo como resultado órganos dentales llamados supernumerarios. Presentación del caso: Paciente masculino de 7 años 11 meses de edad con dentición mixta y retraso en la erupción de los incisivos centrales y laterales superiores. En la radiografía panorámica se observa una zona radiopaca entre el incisivo central superior permanente (OD 21) y el incisivo lateral superior permanente (OD 22) diagnosticando un diente supernumerario. Con ayuda de una radiografía oclusal y una periapical de la zona se valoró y se determinó su extracción bajo anestesia local. Se realizó la cirugía sin complicaciones y se derivó al paciente a la clínica de ortodoncia. Conclusiones: En el presente reporte se pudo observar que llevando un buen control del caso y con la ayuda de estudios radiográficos se puede lograr un avance significativo sin dañar la integridad bucal del paciente en un futuro. Significancia clínica: El diagnóstico precoz puede mejorar con ayuda de los diversos tipos de radiografías disponibles en odontología, así se evitan complicaciones al paciente infantil.

ABSTRACT Teeth that erupt early are commonly referred to as natal or neonatal teeth. They can be classified according to the degree of maturity or appearance. Their prevalence varies from 1 in 44 to 1 in 30,000 births. Natal teeth are more frequent than neonatal teeth, and they often belong to the primary dentition; they occur bilaterally and principally among women. The etiology of these teeth is unknown, and the most acceptable theory is that the tooth germ is located superficially. Clinically, they resemble normal primary teeth, although they are often smaller and sometimes conical. They are generally characterized by a lack of root formation, changes in enamel and dentin, an immature appearance with hypoplastic enamel and sharp irregular and edges, and yellowish-brown/white opaque coloration. Radiographically there is no root. Histologically, most natal and neonatal teeth may follow a pattern of normal mineralization, but also have alterations in both enamel and dentin. Other findings include absence of the basal layer of Weil, Hertwig's sheath and cement; besides an increase in the number of blood vessels in dilated pulp. Treatment should be tailored to each tooth and each child. Available treatments include extraction or maintenance of the tooth in the arch. The most common complication of neonatal teeth or natal is traumatic ulceration of the ventral portion of the tongue due to friction, called Fede-Riga disease (ulcer). No reports of aspiration exist in the literature. The treatment of natal and neonatal teeth should be assessed very carefully to estimate their mobility, integrity, feeding baby, and the presence of some ulcers.

RESUMEN Los dientes que erupcionan antes de tiempo, desde el nacimiento o posterior a éste, son denominados comúnmente dientes natales o neonatales. Se clasifican de acuerdo al grado de maduración o apariencia. La prevalencia varía de 1 en 44 a 1 en 30,000 nacimientos. Son más frecuentes los dientes natales que los neonatales. Por lo general, pertenecen a la dentición primaria, ocurren de forma bilateral y predominan entre las mujeres. Todavía de etiología desconocida, la teoría más aceptable es que el germen dental tiene una localización superficial. Clínicamente se ven como dientes primarios normales, suelen ser más pequeños, algunas veces de forma cónica. Generalmente son móviles por la falta de formación radicular y presentan alteraciones del esmalte; pueden revelar una apariencia inmadura con hipoplasia del esmalte de bordes irregulares y agudos; su coloración puede ser marrón-amarillento / opaco blanquecino. Radiográficamente hay ausencia de raíz. Histológicamente, la mayoría de los dientes natales y neonatales pueden seguir un patrón de mineralización normal, pero también presentan alteraciones tanto en el esmalte como en la dentina. Otros descubrimientos incluyen ausencia de la capa basal de Weil, vaina de Hertwig y cemento; además de un incremento en el número de vasos sanguíneos dilatados en la pulpa. El tratamiento debe ser adaptado a cada diente y cada niño. Los tratamientos disponibles son: la extracción o el mantenimiento del diente en la arcada. La complicación más común de los dientes neonatales o natales es la ulceración traumática de la parte ventral de la lengua debido a la fricción, llamada úlcera de Riga Fede. No hay reporte de broncoaspiración. El tratamiento de los dientes natales y neonatales deben valorarse con mucho cuidado; estimando su movilidad, integridad, compromiso de la alimentación y la presencia de alguna úlcera.