Sensitometric evaluation of a periapical radiographic film Dentix E?: effect of different processing conditions / Avaliação sensitométrica do filme radiográfico periapical Dentix E: efeito de diferentes condições de processamento

Objective: Knowing the properties of new radiogra-phic films is essentially important, because from this evaluation depends the learning of such films, directly affecting the radiation dose received by the patient in radiographic examination. Thus, the aim of this study was to evaluate the sensitometric properties of a new film ? Dentix E?, and compare it to E-speed? and Insight? films, processed with different liquids and under different conditions. Methods: The films were exposed at predetermined times and manually processed, using the temperature/time method and ready-to-use liquids from Kodak and Prograd, and were automatically processed with Kodak liquids. Later, the density of those X-rays was measured and the characteristic curves were built in order to determine their sensitometric properties, such as contrast, indicative value of sensibility, and latitude. The values of properties were evaluated by the inclination of curves in the graphs and by descriptive statistics. Results: It was possible to observe that Dentix E? film presented similar characteristic curves and sensitometric properties to E-speed? film, regardless of processing. Conclusion: This result indicates that Dentix E? presents contrast, sensibility, and latitude compatible to films classified as E sensibility.

Estudo comparativo da atividade proliferativa celular do fibroma ossificante periférico e da lesão de células gigantes periférica / Comparative study of the proliferative activity of the peripheral giant cells lesion and of peripheral ossifying fibroma

Foi realizado um estudo clínico retrospectivo descritivo e histoquímico de casos do fibroma ossificante periférico (FOP) e da lesão de células gigantes periférica (LCGP), coletados aleatoriamente no arquivo do Serviço de Diagnóstico Histopatológico da Universidade de Passo Fundo. O objetivo do trabalho foi comparar as atividades proliferativas celulares dessas lesões, visando o estabelecimento de uma conduta terapêutica adequada para cada uma das enfermidades. Os dados referentes ao sexo, idade, raça, localização da lesão e ocorrência de recidiva foram analisados e, o número de regiões organizadoras nucleolares (NORs) por núcleo de células ovóides foi determinado por meio do método de impregnação pela prata (Ag-NOR). Os resultados obtidos para o FOP foram de prevalência da lesão em mulheres (70%) da raça branca (60%) com média de idade de 28,11 anos, maior ocorrência da lesão na maxila anterior e índice de recidiva de 30%. O número médio de NORs foi de 1,72 para cada núcleo. Já para a LCGP, o sexo feminino também atingiu 70%, porém a média de idade foi de 42,90 anos e 100% dos pacientes pertenciam à raça branca. A ocorrência da lesão foi maior na região mandibular anterior e apresentou um índice de 20% de recidiva. Nesta lesão, o número médio de NORs foi de 1,93 por núcleo. Contudo, nos testes de correlação, nenhuma das características clínicas apresentou associação com o número médio de NORs por núcleo e a comparação desse número médio por núcleo nas LCGPs e nos FOPs não mostrou diferença significativa entre os grupos.

A retrospective clinical descritive and histochemical study envolving cases of periferic bone fibroma and of periferic giant cell lesion, randomly collected from the archives of Histophatologic Diagnostic Service of University of Passo Fundo was made. The objective of this work was to compare the proliferating cellular activities of these lesions, aiming the establishment of an adequate therapeutic conduct to each one of the disorders. The datas referring to the gender, age, race, position of the lesion and recurrence occurrence were analized and considered and the NORs’ numbers by egg-shaped cells’ nucleus were analized through the impregnation of silver method (Ag-NOR), getting as a result of periferic bone fibroma, 70% women, with an age average of 28.11 years old, where 60% of the pacients were white, and with the lesion’s position more often being on the front upper jaw, with the recurrence’s index up to 30%. The NORs’ average number was of 1.72 to each nucleus. On the periphery giant cell lesion, the female gender had also achieved 70%, however the age’s average was of 42.90 and 100% were white. The occurrence of the lesion was higher on the front inferior jaw and had showed a recurrence’s index of 20%. The NORs’ average of this lesion was 1.93 to each nucleus. Nevertheless, on the correlation’s tests none of these clinic characteristics showed a connection with the higher average’s number of NORs by nucleus and the comparison of NORs average’s number by nucleus on periphery bone fibroma and periphery giant cell lesion did not show a significant difference between the groups.