Hypothetical mortality risk associated with spiral tomography of the maxilla and mandible prior to endosseous implant treatment

European Journal of Oral Sciences - Tập 105 Số 2 - Trang 123-129 - 1997
Karl Dula1,2, R. Mini3, Jörg Thomas Lambrecht4, P.F. van der Stelt1, Paul Schneeberger3, Gerard Clemens2, Herman Sanderink1, Daniel Buser2
1Department of Oral Radiology, School of Dentistry, Academic Center for Dentistry Amsterdam, Amsterdam, The Netherlands
2Department of Oral Surgery, Section of Dental Radiology and Diagnostic Stomatology, School of Dental Medicine, University of Berne, Berne, Switzerland
3Department of Radio-oncology, Division of Medical Radiation Physics, School of Medicine, University of Berne, Berne, Switzerland
4Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dentistry, University of Basle, Basle, Switzerland

Tóm tắt

Radiation dose delivered from the SCANORA® radiography unit during the cross‐sectional mode for dentotangential projections was determined. With regard to oral implantology, patient situations of an edentulous maxilla and mandible as well as a single tooth gap in regions 16 and 46 were simulated. Radiation doses were measured between 0.2 and 22.5 mGy to organs and tissues in the head and neck region when the complete maxilla or mandible was examined. When examining a single tooth gap, only 8% to 40% of that radiation dose was generally observed. Based on these results, the mortality risk was estimated according to a calculation model recommended by the Committee on the Biological Effects of Ionizing Radiations. The mortality risk ranged from 31.4 × 10−6 for 20‐year‐old men to 4.8 × 10−6 for 65‐year‐old women when cross‐sectional imaging of the complete maxilla was performed. The values decreased by 70% when a single tooth gap in the molar region of the maxilla was radiographed. The figures for the mortality risk for examinations of the complete mandible were similar to those for the complete maxilla, but the mortality risk decreased by 80% if only a single tooth gap in the molar region of the mandible was examined. Calculations according to the International Commission on Radiological Protection carried out for comparison did not reveal the decrease of the mortality risk with age and resulted in a higher risk value in comparison to the group of 35‐year old individuals in calculations according to the Committee on the Biological Effects of Ionizing Radiations.

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European Journal of Oral Sciences

Tập 105 Số 2

123-129

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