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Habilitation Thesis
DOI
10.11606/T.23.2009.tde-14122009-101420
Document
Author
Full name
Evangelo Tadeu Terra Ferreira
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2005
Committee
Panella, Jurandyr (President)
Carvalho, Jose Carlos Mesquita
Medici Filho, Edmundo
Moraes, Luiz Cesar de
Tavano, Orivaldo
Title in Portuguese
Estudo comparativo por meio de um programa computadorizado, de filmes radiográficos submetidos a diferentes processamentos automáticos.
Keywords in Portuguese
Filmes radiográficos
Propriedades sensitométricas
Radiografias dentárias
Abstract in Portuguese
Objetivos: Comparar as propriedades de quatro filmes radiográficos odontológicos: Ultra-speed, D, E e Insight (Eastman Kodak Company, Rochester, E.U.A.), submetidos a três diferentes condições de processamento. Métodos: Leituras de intensidades de cinza realizadas no programa Adobe PhotoShop 6.0 (Adobe Systems Incorporated, E.U.A.) forneceram dados para construção de gráficos e curvas para os quatro filmes radiográficos utilizando-se três condições diferentes de processamento e a mesma solução processadora (Kodak-Readymatic). Todos os filmes foram processados automaticamente utilizando-se o equipamento AT2000-Plus (Air Techniques, Hicksville, E.U.A.) com velocidade normal e endospeed e o equipamento Periomat (Dürr Dental, Bietigheim-Bissingen, Alemanha). Resultados: Os filmes Insight e E apresentaram os maiores valores indicativos de sensibilidade, já os filmes Ultra-Speed e D apresentaram resultados menores que os dois anteriores porém próximos entre si. As maiores sensibilidade, contraste e densidade base e velamento foram alcançadas utilizando-se o equipamento AT2000-Plus com velocidade normal e os menores valores para as propriedades sensitométricas foram encontrados utilizando-se o equipamento AT2000-Plus com velocidade endospeed, em um subprocessamento. Conclusões: Para reduzir a dose de radiação para o paciente, para o ambiente, para o operador e seu pessoal auxiliar, recomendamos os filmes Insight e E, pois ambos apresentam características similares utilizando-se a processadora automática Periomat, embora a pesquisa também tenha mostrado que o filme Insight deva ser preferencialmente processado na processadora AT2000-Plus com velocidade normal para alcançar sensibilidade, contraste e densidade base e velamento ideais. O novo filme D pode ser considerado como uma alternativa ao filme Ultra-Speed, sendo no entanto, ambos, menos sensíveis.
Title in English
Comparative study made by a software of intraoral radiographic films submitted to three different processing conditions.
Keywords in English
Densitometric properties
Dental radiography
X-ray film
Abstract in English
Objectives: To attempt to compare the sensitometric properties of four dental films: Ultra-Speed, D-speed, E-speed and Insight (Eastman Kodak Company, Rochester, U.S.A.) in three different processing conditions. Methods: Proper curves were constructed for four dental X-ray films using three different automatic processing conditions and the same processing chemical solution (Kodak- Readymatic). All the films were automatically processed using AT2000-Plus machine (Air Techniques, Hicksville, U.S.A.) in normal and endo speed and Periomat machine (Dürr Dental, Bietigheim-Bissingen, Germany). Comparative analysis was performed to evaluate two sensitometric properties (sensitivity and contrast) and base-plus-fog density to each film. Results: The D-speed and Ultra- Speed films had presented close results to their sensitivities. The Insight and Espeed films had showed higher values to sensitivity and contrast than those previous two. The highest film sensitivity, contrast and base-plus-fog density were achieved using AT2000-Plus in normal speed and lowest values to sensitometric properties were found using AT2000-Plus in endo speed, by sub-processing. Conclusions: The new D-speed film may be considered an alternative to Ultra- Speed. To reduce de radiation dose to the patient, could be recommended form use: Insight and E-speed films. Both of them present similar characteristics using the Periomat automatic machine, however the Insight film must be processed using AT2000-Plus machine in normal speed to achieve optimal sensitivity, contrast and base-plus-fog density.
 
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Publishing Date
2009-12-14
 
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