Eruption Pattern of Permanent Canines and Premolars in Polish Children.

Eruption is a complex and dynamic process determined by both genetic and epigenetic factors. This process involves a number of changes in the tissues surrounding the tooth and in tooth morphology. The aim of this study was to analyze the eruption sequence of permanent canines and premolars on the basis of pantomographic images. The study material consisted of 300 digital pantomographic images of children in the developmental period. The study group consisted of 165 boys and 135 girls. Images of patients of Polish nationality, aged 6-10 years, without diagnosed systemic diseases and local disorders were used in the study. Results: The study has shown that the most common pattern of tooth eruption in the lateral zones is type A positioning of the lateral teeth, which is 4-5-3. This pattern is characteristic of both girls and boys. This pattern also occurs most frequently in the maxilla in both boys and girls. In the mandible, on the contrary, two patterns of lateral tooth eruption were predominant. In girls, types A and E/4-5-3 and 3-4-5/occurred in the mandible, while in boys, types A and C/4-5-3 and 5-4-3/were observed in the mandible. The process of tooth eruption is a recognized measure of a child's physical development, and pantomographic images are an effective and common diagnostic tool.

Estimating molar-incisor-hypomineralization among 8-year-olds based on 15-year public oral health practice-based data.

Background: A wide range in the prevalence of molar-incisor-hypomineralization (MIH) has been reported. Population-based studies are recommended. However, such studies are expensive and time-consuming.Objectives: To estimate the magnitude of MIH condition among 8-year-olds based on routine oral health examinations and to associate first permanent molar (FPM) affection with that of other permanent teeth over time.Materials and methods: This retrospective study, with cross-sectional and longitudinal components, was based on electronic oral health records; all 8-year-olds examined between 2002 and 2016 were included.Results: The average estimated prevalence of MIH was 8.3%; yearly range was 4.8-15.9%. The mean number of affected teeth was 1.4; 62% had one affected tooth. One-surface defects were the most frequent (66%). Asymmetric distribution of affected teeth was observed. In follow-up, 10.7%, 8.4%, and 11.2% had at least one affected permanent canine, premolar, or second permanent molar, respectively. The proportion of children with other MIH-affected permanent teeth was higher in the group with ≥2 MIH-affected teeth than in group with one affected FPM at the age of 8.Conclusions: The average prevalence of MIH was comparable to that reported elsewhere. The number of MIH-affected teeth at early mixed dentition predicts the affection of other permanent teeth over time, mainly that of permanent canines. Further screening of children with MIH is recommended to improve individually tailored early preventive and restorative dental care.

Unerupted permanent incisors and associated dental anomalies.

AIM: The aim of the present study was to investigate the association between unerupted permanent incisors and dental anomalies among children and adolescents. METHODS: The clinical records of patients between January 2005 and December 2014 were retrieved to identify those with unerupted permanent incisors. A retrospective audit on the presence or absence of any dental anomalies was done from all available records of the included patients. RESULTS: A total of 266 patients with 320 unerupted permanent incisors were identified from the 15 987 patients in the study. Among the unerupted permanent incisors, 222 (69.4%) were associated with dental anomalies, which was significantly higher than those showing an absence of dental anomalies (N = 98, 30.6%, P < 0.001). For the unerupted maxillary central incisors, a significantly higher proportion was associated with supernumerary teeth (P < 0.001). For the unerupted maxillary lateral incisors, a significantly higher proportion was associated with the ectopic eruption of permanent canines when compared with other dental anomalies (P < 0.001). The presence of the ectopic eruption of permanent canine, double teeth, and hyperdontia was significantly higher among male patients with unerupted permanent incisors. CONCLUSIONS: Unerupted permanent incisors were associated with supernumerary teeth and ectopic eruption of permanent canines. Specifically, a higher proportion of unerupted maxillary central incisors was associated with the presence of supernumerary teeth, whereas a higher percentage of unerupted maxillary lateral incisors was associated with the ectopic eruption of permanent canines.

Caninos permanentes retenidos en pacientes del Hospital Pediátrico Universitario Centro Habana. 2012-2015 / Retained permanent canines in patients of the University Pediatric Hospital of Centro Havana. 2012-2015

Introducción:Los caninos permanentes son dientes importantes para el aparato estomatognático. La retención de estos por limitación física en su erupción debe ser tratada en forma temprana con aparatología ortodóncica que permita una rehabilitación precoz y evitar tratamientos quirúrgicos más cruentos. Objetivo: Caracterizar los pacientes pediátricos con caninos permanentes retenidos atendidos en el Servicio de Cirugía Máxilofacial del Hospital Pediátrico Universitario Centro Habana, en el período de 2012 a 2015. Material y Métodos:Se realizó un estudio retrospectivo descriptivo en pacientes pediátricos con caninos permanentes retenidos atendidos en el Servicio de Cirugía Maxilofacial del Hospital Pediátrico Universitario Centro Habana, durante el período mencionado. Resultados: Se obtuvo un predominio del sexo femenino (69 por ciento).La edad de mayor detección de esta anomalía dentaria fue la de 13 años (26 por ciento). El canino permanente que más se retuvo fue el superior derecho (62 por ciento). El tipo de retención más frecuente la constituyó la unilateral (67 por ciento). La retención Clase I maxilar fue la de mayor presentación clínica (25 por ciento). El tratamiento más empleado fue la excéresis quirúrgica (50 por ciento). Conclusiones: En los pacientes pediátricos estudiados, los caninos retenidos se presentan fundamentalmente en el sexo femenino y los 13 años es la edad de mayor detección de esta anomalía dentaria. El canino permanente que más se retiene es el superior derecho (13) por palatino y la excéresis quirúrgica es el tratamiento más empleado(AU)