ABSTRACT
As perfurações endodônticas comunicam o canal radicular com o periodonto, em consequência de cárie, reabsorções ou causas iatrogênicas. O sucesso no tratamento está diretamente relacionado com a localização, tamanho e período entre a ocorrência e o tratamento. Os materiais utilizados no tratamento exercem função importante no selamento da área perfurada e a biocompatibilidade junto aos tecidos. A primeira via de tratamento é a não-cirúrgica. Caso o resultado não seja satisfatório, opta-se pelo acesso cirúrgico. Dos materiais para o tratamento de perfurações, na atualidade, o MTA (Agregado Trióxido Mineral) é o mais usado. É material bioativo que permite a formação de cemento, oferecendo condições para organização dos tecidos de suporte dentário. O objetivo esperado para o tratamento das perfurações é prevenir a reabsorção óssea e a perda de ligamento periodontal da região perfurada evitando a infecção. Foi objetivo desse trabalho descrever dois casos clínicos de dentes com perfuração radicular, preenchidas com cimento a base de MTA.
Endodontic perforations are accidents that communicate the internal environment with the dental periodontium. They can be caused by caries, resorption or iatrogenic factors. The successful treatment in the perforations is directly related to their location, size and time between the accident and treatment. The materials used also play important function in connection with the sealing of the perforated area and biocompatibility with human tissue. The first-line treatment is non-surgical. If the result is not positive, surgical approach should be chosen. Actually, MTA (Mineral Trioxide Aggregate) is the most used material for perforations treatment. It is a bioactive material that allows the formation of cementum and gives the conditions for the organization of the teeth supporting tissues. The expected goal for the perforation treatment is to prevent bone resorption and periodontal ligament lost in the region, avoiding the infection. The objective of this paper was to describe two case reports of dental radicular perforations filled by a MTA-based cement.
ABSTRACT
Currently, algae and algae products are extensively applied in the pharmaceutical, cosmetic and food industries. Algae are the main organisms that take up and store heavy metals. Therefore, the use of compounds derived from algae by the pharmaceutical industry should be closely monitored for possible contamination. The pollution generated by heavy metals released by industrial and domestic sources causes serious changes in the aquatic ecosystem, resulting in a loss of biological diversity and a magnification and bioaccumulation of toxic agents in the food chain. Since algae are at the bottom of the aquatic food chain, they are the most important vector for transfer of pollution to upper levels of the trophic chain in aquatic environments. Moreover, microalgae are also used for the bioremediation of wastewater, a process that does not produce secondary pollution, that enables efficient recycling of nutrients and that generates biomass useful for the production of bioactive compounds and biofuel.
ABSTRACT
In this work we described the cultivation of Chlorella vulgaris in a photobioreactor to algal biomass production. The dried biomass was used as feedstock for biodiesel production, it presented 26 percent lipids and via sonocatalysis stage of the methodology resulted in 60 percent of fatty acid methyl esters (FAME). The FAME content was confirmed by Gas Chromatography (GC).
ABSTRACT
Nevoid cell carcinoma syndrome or Gorlin-Goltz syndrome is an autosomal dominant disorder characterized by multiple basal cell carcinoma, multiple keratocyst tumors, and skeletal anomalies. The Gorlin-Goltz syndrome has been associated with numerous benign and malignant neoplasms. The authors describe a case of Gorlin-Goltz syndrome in association with non-Hodgkin's lymphoma. To the best of our knowledge, this is the second case described in the English literature.
ABSTRACT
Purpose: Burkitt's lymphoma is one of the fastest growing malignancies in the pediatric population. It is a high-grade B-cell non-Hodgkin's lymphoma with endemic, sporadic and human immunodeficiency-associated subtypes. The African, or endemic, variant usually involves the maxilla and other facial bones, while head and neck manifestations in sporadic Burkitt's lymphoma are rare. Case description: Two cases of oral manifestations of Burkitt's lymphoma are described on the right jaw in young patients, which had different clinical evolution and prognosis.
Objetivo: O linfoma de Burkitt é uma das mais importantes neoplasias de crescimento rápido na população pediatra. É um linfoma Não-Hodgkin primário de células B subdividido em endêmico, esporádico ou associado a imunodeficiência humana. O tipo africano (endêmico), quando em cabeça e pescoço, envolve geralmente os maxilares e outros ossos faciais, enquanto que o envolvimento facial da forma esporádica é bem raro. Descrição do caso: São descritos dois casos intra-bucais de linfomas de Burkitt envolvendo maxila direita em pacientes jovens, os quais apresentaram evolução clínica e prognósticos diferentes.