1Wenzel A,Hintze H,Mikkelsen L,et al.Radiographic detection of occlusal caries in noncavitated teeth:a comparison of con-ventional film radiographs,digitized film radiographs,and radio-visiography.Oral Surg Oral Med Oral Pathol,1991,72(5):621.
2Heaven TJ,Firestone AR,Feagin FF.Computer-based image analysis of natural approximal caries on radiographic films.J Dent Res,1992,71(Suppl):846.