Comparison between radiation doses commonly used dental radiographic surveys with different collimators

الملخص EN

Aim of the study : An equivalent radiation dose to that of a complete mouth survey, bite–wing radiographs, panoramic survey and cephalometric survey was exposed on a phantom head.

Materials and Methods : Ten human skulls were used in this study and the average readings of radiation doses which are read with the dose-measuring instrument, this instrument in which the pocket dosimeter is charged and later read in terms of radiation exposure (charger-reader) this mean that tissue-equivalent phantom fitted with dose-measuring instrument or dosimeters.

This study was used to evaluate and to compare the radiation dose associated with commonly used dental radiographic surveys including the following : - 1.

Fourteen full-mouth survey.

2.

Bit-wing radiographs.

3.

Panoramic survey and, 4.

Lateral cephalometric radiograph.

Results : It was demonstrated that converting from round to rectangular collimation reduced the radiation exposure by a factor or four.

Conclusion : A panoramic survey used approximately one third of the radiation exposure needed to expose a full-mouth survey with rectangular collimation.