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[Absorbed doses in dental radiology]

S D Bianchi1, M Roccuzzo, F Albrito

  • 1Istituto di Radiologia, Università degli Studi, Torino.

La Radiologia Medica
|July 1, 1996
PubMed
Summary

This study measured in vivo radiation doses for dental X-rays, finding lower-than-expected doses for Full Mouth Periapical Examination (FMPE) and Intraoral Tube Panoramic Radiography (ITPR), suggesting a reduced radiation risk for these procedures.

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Area of Science:

  • Radiological Sciences
  • Medical Physics
  • Dental Imaging

Context:

  • Dento-maxillo-facial radiographic examinations are increasingly common.
  • Previous dosimetry studies primarily used phantoms, with limited in vivo data.
  • Accurate in vivo dosimetry is crucial for radiation protection in dental radiography.

Purpose:

  • To evaluate in vivo absorbed radiation doses during Orthopantomography (OPT), Full Mouth Periapical Examination (FMPE), and Intraoral Tube Panoramic Radiography (ITPR).
  • To compare radiation doses across different intraoral and extraoral sites.
  • To assess the reliability and clinical relevance of in vivo dosimetry in dental radiography.

Summary:

  • Measurements were conducted on 30 patients using 46 intra- and extra-oral thermoluminescent dosimeters (TLDs).

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  • Highest doses were recorded at specific sites: right mandibular angle in OPT (1899 μGy), right naso-labial fold in FMPE (5640 μGy), and palatal surface of the left second upper molar in ITPR (1936 μGy).
  • Intraoral doses varied significantly, from 21 μGy (OPT) to 4494 μGy (FMPE), with higher standard errors for FMPE and ITPR.

    • Impact:

    • Provides crucial in vivo dosimetry data for common dental radiographic procedures.
    • Suggests that FMPE and ITPR may have lower radiation risks than previously assumed.
    • Highlights the importance of in vivo measurements for accurate clinical dosimetry and radiation safety assessments.