Dentistry Commons^™

Interactions Between Silica And Titanium Nanoparticles And Oral And Gastrointestinal Epithelia: Consequences For Inflammatory Diseases And Cancer, Cassio Luiz Coutinho Almeida-Da-Silva, Leticia Ferreira Cabido, Wei Chun Chin, Ge Wang, David M. Ojcius, Changqing Li

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Engineered nanoparticles (NPs) composed of elements such as silica and titanium, smaller than 100 nm in diameter and their aggregates, are found in consumer products such as cosmetics, food, antimicrobials and drug delivery systems, and oral health products such as toothpaste and dental materials. They may also interact accidently with epithelial tissues in the intestines and oral cavity, where they can aggregate into larger particles and induce inflammation through pathways such as inflammasome activation. Persistent inflammation can lead to precancerous lesions. Both the particles and lesions are difficult to detect in biopsies, especially in clinical settings that screen large numbers …

Effect Of Voxel Size On The Accuracy Of 3d Reconstructions With Cone Beam Ct., Delphine Maret, Norbert Telmon, Ove A. Peters, B. Lepage, J. Treil, J. M. Inglèse, A. Peyre, Jean-Luc Kahn, Michel Sixou

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OBJECTIVES: The various types of cone beam CT (CBCT) differ in several technical characteristics, notably their spatial resolution, which is defined by the acquisition voxel size. However, data are still lacking on the effects of voxel size on the metric accuracy of three-dimensional (3D) reconstructions. This study was designed to assess the effect of isotropic voxel size on the 3D reconstruction accuracy and reproducibility of CBCT data.

METHODS: The study sample comprised 70 teeth (from the Institut d'Anatomie Normale, Strasbourg, France). The teeth were scanned with a KODAK 9500 3D® CBCT (Carestream Health, Inc., Marne-la-Vallée, France), which has two voxel …