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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Proteção Radiológica - SBPR
2020
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=722280907009 |
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Inhaltsangabe:
- Evaluation of PETG as a material for immobilization device used in radiation therapy for head and neck Heitor Birnfeld Gabriela Corati Touguinha Romulo Rocha Santos Mirko Salomón Alva-Sánchez Luzia Millão Biología PETG Immobilizers radiotherapy In planning the radiotherapy treatment of head and neck cancer, the oncologist can indicate the use of an intraoral prosthesis to facilitate the radiation therapy planning and reduce the toxicity of the treatment. These devices are commonly fabricated with dental acrylic resin, the polymethylmethacrylate (PMMA), yet there are reports about manufacture in thermoplastic materials. The polyethylene terephthalate glycol (PETG) is a compound used for the fabrication of dental appliances, which could be used at intraoral prosthesis manufacture. The main objective of the present work was to evaluate the potential use of PETG at intraoral prosthesis for radiotherapy of head and neck cancer. Materials and methods: Circular forms of PMMA and PETG of thicknesses of 1, 2 and 3 mm were used with the dimensions of a head phantom, which allowed the insertion of a radiochromic film. The irradiations occurred at a linear accelerator with photons of 6 MeV energy. Results: The percentage depth dose differences of the materials PMMA and PETG were of 3%, 8% and 4%, respectively for the thicknesses of 1, 2 and 3 mm, around the position of the circular forms. Conclusion: Based on the results obtained, it can be inferred that PETG is suitable for manufacturing the intraoral prosthesis for radiotherapy treatment, replacing existing materials. 2020 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280907009 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.3 Vol.8