| Objective: This study aimed to investigate how the radiographic processing method affect the radiographic density of two types of film. Methods: Radiographs from non-cavitated occlusal caries lesions obtained in a previous study were used. We analyzed 28 films from 12 patients that were obtained with the same X-ray device. Seven Ektaspeed (Kodak Eastman Kodak Co, Rochester, NY, USA) and seven Ultraspeed (Kodak Eastman Kodak Co) films were manually processed, while seven Ektaspeed and seven Ultraspeed films were automatically processed. The angle of incidence of the X-ray beam and the distances between the apparatus, the tooth and the film were standardized. Therefore, the study comprised four groups: GE1: Ektaspeed manually processed; GE2: Ektaspeed automatically processed; GU1: Ultraspeed manually processed; and GU2: Ultraspeed automatically processed. The images were digitized (G40450 Scan Jet C/T, Hewlett-Packard) and analyzed using Digora for Windows 2.7 (Soredex Medical Systems) to obtain the average radiographic density, and data were analyzed using Student's t test for paired data (Bioestat 5.3). Result: Only the Ektaspeed film showed statistically significant differences among radiographic densities with different processing methods (p = 0.0037). Conclusion: The Ektaspeed film automatically processed is better suited for the early diagnosis of caries lesions.DESCRIPTORS | X-Ray Diagnosis; Dental Caries; Digital Dental Radiography; Community Dentistry. RESUMO | Influência do tipo de filme e método de processamento na densidade radiográfica para diagnóstico de cárie oclusal •Objetivo: Este estudo tem como objetivo estudar a influência do método de processamento na densidade radiográfica de dois tipos de filmes. Métodos: Foram utilizadas radiografias de lesões de cárie oclusais não cavitadas obtidas em estudo prévio. Foram analisados 28 filmes obtidos de 12 pacientes cujas radiografias foram realizadas com o mesmo aparelho radiológico. O mesmo número de filmes (n=7) Ektaspeed (Kodak Eastman Kodak Co, Rochester, NY, USA) e Ultraspeed (Kodak Eastman Kodak Co) foram processados manualmente e automaticamente. Desta forma, o estudo compreendeu quatro grupos: GE1: Ektaspeed processado manualmente (n=7); GE2: Ektaspeed processado automaticamente (n=7); GU1: Ultraspeed processado manualmente (n=7) e GU2: Ultraspeed processado automaticamente (n=7). As imagens foram digitalizadas (G40450 Scan Jet C/T, Hewlett-Packard) e analisadas utilizando o programa Digora for Windows 2.7 (Soredex Medical Systems) para obter a média da densidade radiográfica. Os dados foram analisados através do teste T de Student para dados pareados (Bioestat 5.3). Resultado: Apenas o filme Ektaspeed mostrou diferenças estatisticamente significantes entre as densidades radiográficas com os diferentes métodos de processamento (p = 0.0037). Conclusão: O filme Ektaspeed processado automaticamente é mais apropriado para o diagnóstico precoce de lesões de cárie oclusal. DESCRITORES |
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