Dentin Thickness of Pulp Chamber Floor in Primary Molars: Evaluation by Cone-Beam Computed Tomography

ABSTRACT Objective: Use cone-beam computed tomography (CBCT) images to evaluate the dentin thickness of the pulp chamber floor in primary molars. Material and Methods: Cross-sectional study, conducted with CBCT images of teeth of children. Primary molars with preserved pulp chamber floor were included. The dentin thickness of the pulp chamber floor in the primary molars was measured linearly in CBCT cross-sections. Data were descriptively analyzed and the Mann-Whitney test was applied (p<0.05). Results: 27 CBCT exams and 123 primary molars of children aged 4 to 13 years were analyzed; the majority was female (52.0%). In maxillary molars, the median dentin thickness was 1.50 (0.6-2.2) mm in the first and 1.65 (0.6-2.3) mm in the second (p=0.049) molars. In mandibular molars, the median was 1.20 (0.3-1.7) mm in the first and 1.60 (1.0-2.2) mm in the second (p<0.001) molars. Children aged 4 to 8 years showed less dentin thickness (p<0.001). Conclusion: The median dentin thickness of the pulp chamber floor in primary molars was 1.50 mm, ranging from 0.3 to 2.3 mm. Less dentin thickness was associated with younger children, teeth in the mandibular arch, and first molars.

Plataforma colaborativa multimídia para apoio ao diagnóstico de lesões bucais em ambientes de teleodontologia / Collaborative multimedia platform to support oral diagnosis in teledentistry environments

Este artigo tem por objetivo apresentar uma solução tecnológica desenvolvida para permitir atividades colaborativas de diagnóstico de lesões bucais em ambientes de Teleodontologia. Trata-se de uma plataforma totalmente baseada na web e que permite o gerenciamento e compartilhamento de imagens clínicas, radiográficas e histopatológicas, dispensando a instalação de qualquer programa adicional no computador do usuário. Como suporte à colaboração através do navegador, as ações efetuadas por um usuário são replicadas e visíveis ao outro usuário conectado, sendo possível a discussão e troca de informações sobre o caso através de chat e/ou áudiovideoconferência. Ferramentas de Telessaúde podem ofereçe diferentes oportunidades para assistência e educação em Odontologia. Ao permitir a visualização de diferentes aspectos da doença do paciente, a solução aqui apresentada tem potencial para viabilizar: (1) a troca de informações entre profissionais de saúde atuantes em distintos níveis de assistência e (2) a tutoria, à distância, nos diferentes níveis de formação (graduação, pós-graduação e educação continuada) (AU).

This paper presents a technological solution developed to enabling collaborative activities in Teledentistry environments. This is a platform composed by a set of tools for the management and sharing of clinical, radio graphic and histopathologic images. The proposed solution is fully web-based, requiring only a web browser installed; it's not necessary to install any other software on the user's computer. As collaboration support, the actions performed by a user with mouse and keyboard are replicated and visible to the other connected user. This toolkit allows the discussion of disease via chat and/or videoconferen ing. Telehealth's tools offer opportunities for assistance and education in Dentistry. By allowing realtime viewing and discussion of different aspects of a disease this technological solution has potential to facilitate: (1) exchange of information between health professionals at different levels of assistance and (2) distance tutoring at different levels of training (undergraduate, postgraduate and continuing education) (AU).

Multidetector-row CT of the Gastrointestinal Tract / 대한소화기학회지

Recently, the availability of multidetector-row CT (MDCT) and continuous refinement in three-dimensional (3D) imaging process have greatly expanded the role of CT in evaluating patients with gastrointestinal diseases. MDCT is the latest advancement in CT technology and is now more readily available. This imaging modality can offer full examination of the entire intestinal tract as well as powerful information about the bowel itself and its surrounding structures, which are inherent advantages of CT over conventional barium or optical endoscopic studies. In most cases, MDCT with various 3D technologies can make an easy, rapid, and accurate diagnosis by one-stop imaging, and enables to avoid other examinations. Therefore, knowledge and awareness of valuable clinical applications and proper scan technique of MDCT imaging is essential to achieve the diagnostic goal of one-step imaging.