原著
根尖部撮影におけるRVGとX線写真の比較に関する研究
1992 年 13 巻 1 号 p. 24-34
詳細
1992 年 13 巻 1 号 p. 24-34
The conventional dental radiography which is nowadays used in daily dental practice, has some disadvantages. As one of them, cell damage by exposure of sarplus X-ray doze could be mentioned. Furthermore, films and the solution for development are needed. Recently, without such troubles, talking X-ray picture became possible. This device is called Radio-Visio-Graphy which was developed by Mouyen in France in 1989.
The purpose of this study was to compare with Radio-Visio-Graphy (RVG) with conventional radiography at the periapical region by using some kinds of methods.
Five extracted human parmanent teeth (2 anterior teeth, 1 premolar tooth and 2molar teeth), a dry cranial bone, a partial mandibula bone embedded in resin and human teeth (10 persons) were used for this research.
As a result, It was proved that RVG could reduce the radiation doze at 67.9～88.5%, comparing with the ardinary periapical films (D-speed film), and that we could get a picture immediatly after turring on the switch of X ray device. But, it was found that it was necessary to improve the sensor size and the resolving power, in order to carry out the precise clinical application. From the above results, the effectiveness and usefulness were confirmed, but a more improvement about the clear imagination and the miniaturization of the sensor seemed to be still neccessary.
