Reconstruction of panoramic dental Iimages through Bézier function optimization

The authors were grateful to CAPES, CNPq, and FAPESP for their financial support.Computed tomography (CT) and X-ray images have been extensively used as a valuable diagnostic tool in dentistry for surgical planning and treatment. Nowadays, dental cone beam CT has been extensively used in dental clinics. Therefore, it is possible to employ three-dimensional (3D) data from the CT to reconstruct a two-dimensional (2D) panoramic dental image that provides a longitudinal view of the mandibular region of the patient, avoiding an additional exposure to X-ray. In this work, we developed a new automatic method for reconstructing 2D panoramic images of the dental arch based on 3D CT images, using Bézier curves and optimization techniques. The proposed method was applied to five patients, some of them with missing teeth, and smooth panoramic images with good contrast were obtained.info:eu-repo/semantics/publishedVersio

Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

Análise biomecânica das fraturas do fémur: estudo preliminar de uma haste intramedular bloqueada

O principal objetivo deste estudo é incidir na análise biomecânica das fraturas do fémur e no projeto de próteses femorais. O estudo efetuado teve o acompanhamento clínico de cirurgias à diáfise do fémur, em hospitais especializados no Brasil. Será apresentado um estudo preliminar de uma haste intramedular bloqueada por elementos finitos para análise no conjunto biomecânico osso-implante

Análise biomecânica de uma fratura simples no fémur

O principal objetivo deste trabalho é apresentar uma metodologia de análise computacional para fraturas simples do fémur. Será apresentado o estudo de uma haste intramedular bloqueada para fixação da fratura óssea por elementos finitos utilizando o programa Ansys

POMES: An Open-source Software Tool to Generate Porous/Roughness on Surfaces

AbstractThe long-term success of implants depends on rapid healing and safe integration with body. In the case of orthopaedic and dental implants it was found that geometry and surface topography are crucial for short and long-term success of the implant, due to its effects in osseointegration. Properties of implant surfaces have been studied in the last decade in a concentrated effort to improve osseointegration process and implant success. Several researchers have proved that roughness of implant surface is related to healing time and integration between the implants and the bone, but the parameters on the surface creation are not fully controllable with current processes. In this work, computational algorithms are proposed for implant surface design in order to control the parameters required for this application. As a result it is presented an open-source software tool, called POMES - Porous and Modifications for Engineering Surfaces -, to design porous/roughness on top of surfaces in any geometry. Additionally, an example model was fabricated using POMES and additive manufacturing

Rapid prototyping and inclined plane technique in the treatment of maxillofacial malformations in a fox

An approximately 9-month-old fox (Pseudalopex vetulus) was presented with malocclusion and deviation of the lower jaw to the right side. Orthodontic treatment was performed using the inclined plane technique. Virtual 3D models and prototypes of the head were based on computed tomography (CT) image data to assist in diagnosis and treatment