Abstract: Objective：To explore and analyze the quality of DR-filmed tooth slice image and its value in clinical application.Methods：The periapical films of 260 teeth in 230 cases was taken by DR equipment and compared with the traditional films.Results：Compared with traditional teeth radiography technology,using DR to film the teeth outside the mouth,the exposure time was shorten,the quantity of projection was reduced,and the image definition was improved obviously.Conclusions： The DR tooth slice X-ray photography technology is superior to the traditional periapical radiography,and it has a bright prospect in clinical science of stomatology.