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Radiographic changes on panoramic imaging following intensity-modulated radiation therapy.

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  • 1Dental Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA.

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Summary
This summary is machine-generated.

Intensity-modulated radiation therapy (IMRT) can cause subclinical radiographic changes in the mandible. Close dental monitoring is recommended for oropharyngeal cancer patients post-IMRT to prevent complications like osteoradionecrosis.

Keywords:
IMRTOropharyngeal cancerPanoramic radiographRadiation therapyRadiographic changes

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Area of Science:

  • Dental Radiology
  • Oncology
  • Radiation Therapy

Background:

  • Oropharyngeal cancer treatment often involves radiation therapy.
  • Intensity-modulated radiation therapy (IMRT) is a common radiation technique.
  • Radiographic changes in the jaw following IMRT require documentation.

Purpose of the Study:

  • To document radiographic changes on panoramic radiographs after IMRT.
  • To assess the impact of IMRT on mandibular and maxillary structures.

Main Methods:

  • Retrospective study of 143 oropharyngeal cancer patients treated with IMRT.
  • Evaluation of pre-IMRT and post-IMRT panoramic radiographs (286 total).
  • Analysis of radiographic changes in the maxilla and mandible.

Main Results:

  • No significant radiographic changes were observed in the maxilla post-IMRT.
  • Significant mandibular changes included periodontal ligament space widening and vertical defects on the ipsilateral side.
  • No significant association found between other specific bone loss patterns and ipsilateral IMRT.

Conclusions:

  • Subclinical radiographic changes in the mandible are common after IMRT.
  • These changes indicate periodontium devitalization and necessitate close dental monitoring.
  • Frequent dental recalls are crucial to minimize risks of oral surgery complications and osteoradionecrosis.