Dosimetric evaluation of the effect of dental implants in head and neck radiotherapy.

Abstract

OBJECTIVE:

The aim of the study was to examine the dose enhancement from scattered radiation at bone-dental implant interfaces during simulated head and neck radiotherapy.

STUDY DESIGN:

Four cylindrical titanium dental implants with 3 different sizes and lengths were implanted into a human mandible in 4 different positions. Ionization measurements for 6 MV X, 25 MV X, and Co-60 gamma rays were done. Thermoluminescent dosimeter (TLD 100 ) chips were used to measure radiation dose enhancement due to the scattered electrons from titanium and electronic disequilibrium at the tissue-metal interface.

RESULTS:

The results showed that for Co-60, there is a 21% maximum increase in dose to alveolar mandibular bone at the close proximity to the titanium. For 6-MV x-rays the dose enhancement increase was almost the same or slightly lower than for Co-60, while for 25-MV high-energy x-rays, dose enhancement was lower than that of others. This increase in dose enhancement fell off rapidly and became insignificant at 2 mm from the interface.

CONCLUSION:

Total dose that may lead to osteoradionecrosis risk of the mandible is slightly but not significantly affected by the scattered dose of the dental implants of lower jaw in the radiation field exposed to 3 different radiation beams.

• Authors: Julide Ozen, Bahar Dirican, Kaan Oysul, Murat Beyzadeoglu, Ozlem Ucok, Bedri Beydemir
• Journal: Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics (Oral Surg Oral Med Oral Pathol Oral Radiol Endod) Vol. 99 Issue 6 Pg. 743-7 (Jun 2005) ISSN: 1528-395X [Electronic] United States
• PMID: 15897862 (Publication Type: Journal Article)

Chemical References

• Cobalt Radioisotopes
• Dental Implants
• Titanium

Topics

• Cadaver
• Cobalt Radioisotopes
• Cranial Irradiation
• Dental Implantation, Endosseous, Endodontic
• Dental Implants
• Gamma Rays
• Humans
• Mandible (radiation effects)
• Phantoms, Imaging
• Radiotherapy Dosage
• Radiotherapy, High-Energy (statistics & numerical data)
• Scattering, Radiation
• Thermoluminescent Dosimetry
• Titanium