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Tooth decay is the main oral pathology and a worldwide public health problem. The paediatrician is the first medical professional to assess and treat children. Therefore, it is important that they are well informed. The aim is to determine the level of dental knowledge of paediatricians practising in the public and private health sectors in Catalonia (Spain).Cross-sectional, descriptive, and analytical study of the basic dental knowledge of paediatricians through an anonymous and voluntary survey of 17 questions on prevention, trauma and dental cavities. The results are segmented based on professional experience, type of centre and whether it has a paediatric dentistry area.A total of 129 paediatricians from Catalonia participated. Almost all paediatricians (86.82%) normally perform an oral examination in a routine visit; 31.8% refer the child to the paediatric dentist when the first permanent molars have erupted, and 41.9% indicate that toothpaste should contain a minimum of 1,000 ppm of fluoride. It is proven that paediatricians practising in the private sector have greater dental knowledge than those in the public sector (p = 0.019). Experience is not related to knowledge (p = 0.0691). The paediatricians who have a paediatric dentistry area in their workplace show greater knowledge (p = 0.046).Only half of the surveyed paediatricians follow the recommendations of paediatric societies on prevention aspects. In dental traumatology, professionals mostly follow the recommendations supported by the literature with high scientific evidence.

This work reports the CMOS compatible and monolithic fabrication of a conventional planar field effect transistor (FET) co-integrated with a quantum dot (QD) based single electron transistor (SET). The FET process fabrication is adapted to fulfill the restrictions imposed by the pre-fabricated SET, such as reduced thermal budget, extra protection layers and modified doping in order to obtain low threshold voltage. The resulting FET presents good subthreshold characteristics and the SET preserves its integrity at the end of the fabrication.

The inherent three-dimensional topology of vNWs imposes several constraints to their fabrication and their integration in other circuits. We present here the use of Hydrogen silsesquioxane (HSQ) for the fabrication of single electron transistors (SETs) based on vNWs.

The main objective was to study supernumerary teeth diagnosed during the routine checkups at the Paediatric Dentistry Service of Hospital de Nens, Barcelona (Spain), for four months.A transversal, descriptive study, was performed in 1,960 patients, aged 1 to 17 years, visited during routine oral checkups. An intraoral exploration (with intraoral mirror and probe) was performed to all patients, and subjects older than 5 years also underwent panoramic x-ray examination.A total of 33 patients showed supernumerary teeth (1.68%), 22 boys and 11 girls. A total of 10 patients (8 boys/2 girls) had supernumerary teeth in the temporary dentition, 20 patients (12 boys/8 girls) in the permanent dentition and 3 patients (2 boys/1girls) in both temporary and permanent dentition. A total of 46 supernumerary teeth were diagnosed.Any alteration in the number of teeth in patients younger than 5 years are difficult to diagnose, as x-rays are usually not taken. We believe that starting at 5 years old, a radiological exploration (panoramic x-ray) has to be carried out as a complement to the clinical examination.

The purpose of this unique case report is to describe a very unusual dentoalveolar fracture associated with avulsion of the near-complete root. A 3-year-old male patient came for consultation after a dentoalveolar trauma with a “fragment that looks like canine” found in his mouth by his mother. This boy suffered root fracture of the upper primary central right incisor, accompanied by transalveolar and transmuco-gingival avulsion of the tooth root fragment, leaving the crown in its position in the dental arch. Clinical and radiological examinations were performed in order to follow up the case: 15 days, one month, and three months after trauma, the crown had a slight mobility without other clinical or radiological signs. After six months, the upper primary central right incisor’s crown was exfoliated. Open bite due to the persistence of the pacifier habit favored the crown retention in the mouth. This case emphasizes the importance of primary diagnosis and follow-up of trauma cases. To the best of our knowledge, this kind of dental injury has not been previously described in the literature nor in the current Dental Trauma guidelines for the management of traumatic dental injuries in the primary dentition.