Recurrent aphthous stomatitis and Helicobacter pylori

Background: Recurrent aphthous stomatitis (RAS) is a recurrent painful ulcerative disorder that commonly affects the oral mucosa. Local and systemic factors such as trauma, food sensitivity, nutritional deficiencies, systemic conditions, immunological disorders and genetic polymorphisms are associated with the development of the disease. Helicobacter pylori (H. pylori) is a gram-negative, microaerophile bacteria, that colonizes the gastric mucosa and it was previously suggested to be involved in RAS development. In the present paper we reviewed all previous studies that investigated the association between RAS and H. pylori. Material and Methods: A search in Pubmed (MEDLINE) databases was made of articles published up until July 2015 using the following keywords: Helicobacter Pylori or H. pylori and RAS or Recurrent aphthous stomatitis. Results: Fifteen experimental studies that addressed the relationship between infection with H. pylori and the presence of RAS and three reviews, including a systematic review and a meta-analysis were included in this review. The studies reviewed used different methods to assess this relationship, including PCR, nested PCR, culture, ELISA and urea breath test. A large variation in the number of patients included in each study, as well as inclusion criteria and laboratorial methods was observed. H. pylori can be detected in the oral mucosa or ulcerated lesion of some patients with RAS. The quality of the all studies included in this review was assessed using levels of evidence based on the University of Oxford’s Center for Evidence Based Medicine Criteria. Conclusions: Although the eradication of the infection may affect the clinical course of the oral lesions by undetermined mechanisms, RAS ulcers are not associated with the presence of the bacteria in the oral cavity and there is no evidence that H. pylori infection drives RAS developmen

Use of Surgical Laser for Excision of a Neurofibroma Associated With Neurofibromatosis Type-1

Introduction: Neurofibromatosis type 1 (NF1) is an autosomal dominant genetic disorder that affects approximately 1/3500 individuals. Various bone manifestations and peripheral nerves neoplastic lesions associated with NF1 are seen in the jaws. Several oral manifestations may occur in this disorder; therefore the dentist’s knowledge and multidisciplinary management of these patients are extremely important.Case Presentation: In the present article, we present the use of a high-power surgical laser to excise a neurofibroma in a patient with several intraoral manifestations associated with NF1.Conclusion: The use of diode laser (808 nm) for excision biopsy of tongue nodules showed no thermal damage to the tissue, allowing an adequate histopathological analysis of the neurofibrom

ROTAS TECNOLÓGICAS EMPREGADAS NO APROVEITAMENTO DE RESÍDUOS DA INDÚSTRIA DA SOJA

O presente trabalho tem como objetivo realizar uma revisão bibliográfica acerca do potencial de aproveitamento de resíduos proveniente da agroindústria da soja por meio de diversosprocessos tecnológicos. O estudo apresenta as características fitofisionômicas, agrícolas e químicas da soja bem como uma análise minuciosa de suas atividades de produção, industrialização e consumo, de acordo com regiões e unidades federativas brasileiras. São apresentadas durante a revisão as operações unitárias do processo produtivo da agroindústria da soja. Esse trabalho também apresenta o potencial de aproveitamento da casca da soja por meio de rotas tecnológicas, buscando assim a redução da disposição dos resíduos sólidos industriais e agregando valor a essa importante cadeia produtiva

Conversão térmica do lodo da estação de despejo da agroindústria da soja / Thermal conversion of sludge from the soy agroindustry diction station

Esta pesquisa teve como objetivo produzir biocombustíveis a partir do tratamento térmico de resíduos de soja. A pirólise do lodo industrial foi realizada a fim de obter bio-óleo e carvão. As amostras de resíduos foram caracterizadas pelas seguintes variáveis analíticas: umidade e teste cinético. O teor de umidade foi determinado de acordo com o método ASTM D 3173-85. O estudo cinético foi realizado em casa de vegetação a duas temperaturas de 40 e 50ºC. Os tempos de secagem foram 1, 2, 3, 4, 5, 10, 20 e 30 horas. A conversão térmica do resíduo foi feita em um reator de leito fixo a uma temperatura de 500 oC, sendo o sistema operado por 30 minutos a uma taxa de aquecimento de 30 ° C / min. Durante o teste cinético observou-se que após 20 horas em uma amostra permaneceu com menos de 30% da matéria inicial nos dois tratamentos utilizados. O rendimento do bio-óleo foi de 45,9%. O pH do bio-óleo estava em torno de 4,0. A densidade do líquido foi de 1,1 g / mL. O tratamento térmico dos resíduos estudados é uma alternativa importante para a geração de biocombustíveis com valor comercial e ambiental, substituindo os combustíveis fósseis e com aplicação industrial como materiais sólidos e oleosos de caráter renovável em sistemas de produção sustent

Ewing’s Sarcoma: imaging findings of a patient with primary tumor in the femur and mandibular metastasis

Ewing’s Sarcoma, a common primary bone malignancy that usually occurs in childhood and young adults, has a predilection for males and occurs mostly in the diaphysis of long bones and pelvis. This tumor rarely affects the head and neck. Histologically, this neoplasm is a small round cell tumor and there is evidence of a neuroectodermal origin. Radiographic findings of ES show an osteolytic lesion, that is not a pathognomonic feature for this neoplasm. The association of conventional imaging methods such radiography, Computed Tomograph (CT), magnetic resonance imaging (MRI), combined with scintigraphy or Positron Emission Tomography/ Computed tomography PET /CT), is essential for a correct diagnosis and treatment. Therefore, the aim of this report was to present image findings of a patient who presented with ES in the femur, and a metastasis in the mandible after eighteen months, and discuss the importance of imaging methods for a correct diagnosis, treatment and consequently, prognosis

STUDY OF THE INFLUENCE OF DOOR INTRUSION VELOCITY IN LATERAL COLLISIONS: BIOMECHANICAL RESULTS

The influence of door intrusion velocity in occupant injury according to Latin NCAP side impact 2016 protocol were studied isolating door panel design or clearance between occupant versus door panel with the main objective of understand purely structural features in a mobile deformable barrier side impact. A sled impact model was created with the validated MADYMO fiftieth percentile occupant model (EuroSid 2) and a finite element flat panel. Impact velocity was incremented from 3.5 to 9.5m/s in intervals of 1m/s. Occupant injury was measured for each case analyzing ribs, abdomen and pelvis behavior to identify a critical intrusion velocity according to project characteristic and its objectives.&nbsp