ESTRO meets Asia 2024 - Abstract Book

S230

Interdisciplinary – Other

ESTRO meets Asia 2024

The results showed that the absorbed dose to the surrounding OARs are significantly increases when dental implants are present. The most prominent changes of absorbed dose to the OARs with the presence of implants can be observed in upper and lower jaw as well as tongue, sublingual and submandibular gland. This is because the structures are located adjacent to the position of dental implants, thus, the scattered energy generated from Compton interaction will be absorbed by the nearest structures. Also, absorbed dose to the upper and lower jaw were affected by the type of materials, number and placement of dental implants but no discernible impact to the surrounding OARs. The composition of the upper and lower jaws, which were predominantly constructed utilising skeleton density, is what accounts for the low fluctuation of the absorbed dose to the other OARs. The high density of the jawbone attenuated any low energy scattered radiation and prevented them from perturbing the jawbone or travelling farther to reach other OARs causing most of the scattered radiation being absorbed in the jaw structures.

Conclusion:

In conclusion, high-density dental implants are shown to cause an increase in the absorbed dose to OARs mainly upper and lower jaw due to Compton scattering, therefore, adjustments to the prescribed dose should be considered for patients with dental implants.

Keywords: Radiotherapy; Dental Implant; GEANT4

References:

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2. Al-Johany, S. S., Al Amri, M. D., Alsaeed, S., & Alalola, B. (2017). Dental Implant Length and Diameter: A Proposed Classification Scheme. Journal of Prosthodontics, 26(3), 252–260. https://doi.org/10.1111/jopr.12517.

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