ESTRO meets Asia 2024 - Abstract Book

S229

Interdisciplinary – Other

ESTRO meets Asia 2024

Purpose/Objective:

The majority of patients with head and neck cancer, notably oral, nasal, and paranasal malignancies, are 50 years of age or older, a group most likely to have a dental implant or prosthesis. Dental implants are often made of high-density materials like metal, ceramic, or polymer materials. The aim of this study was to evaluate the discrepancies in dosimetric effect of the dental implants on the 6 MV external beam radiotherapy for salivary gland cancer by using Geant4 Monte Carlo Simulation.

Material/Methods:

The simulation was conducted using MIRD5 adult male anthropomorphic phantom, readily available in the GEANT4 Monte Carlo package, and a few additional structures were incorporated, such as dental implants, the parotid gland as an irradiated organ, and OARs (brain, brain stem, eyes, eye lens, optic nerve, optic chiasm, submandibular and sublingual glands, tongue, upper and lower jaw, and thyroid). Cylindrical implants measuring 4 mm in diameter and 5 mm in length were inserted into both upper and lower jaw varies by three different parameters: 1) Material of implant (Amalgam, Gold, and Titanium), 2) Number of implant (no implant, single implant, multiple implants, full-mouth implant), and 3) Position of implant (right, left and front of jaw). The absorbed dose to the implant, parotid gland and OARs were recorded.

Results: