Akademik Veri Yönetim Sistemi
MEANDROS MEDICAL AND DENTAL JOURNAL, cilt.25, sa.2, ss.1-5, 2024 (Hakemli Dergi)
Objective: Radiation-induced oral mucositis is a major problem of radiotherapy. This study aims to investigate the effectiveness of polyether silicone-based (PE) and polyvinyl siloxane impression materials (PVS) to protect adjacent tissues from radiation scattered from dental materials.
Methods: Amalgam, zirconium, and titanium dental material specimens were covered with 5 mm PE and PVS in the study group. The dental materials were placed in a linear accelerator device at a distance of 100 cm from the radiation source and coinciding with a field size of 15x15 mm. Samples placed perpendicular to the central beam were irradiated with 6 MV photons with a fractional daily therapeutic radiation dose of 2 Gy. Thermoluminescent dosimeters (TLD-100) placed 90 degrees lateral to the specimens were used for recording the scattered dose data. In the control group, uncovered dental materials were irradiated, and scattered doses were measured by TLD. The TLD data of the study and control groups were compared by independent t-test to analyze the shielding effect of PE and PVS. Besides, the photon stopper properties of PE and PVS were compared. Photon interaction parameters and effective atomic numbers of dental materials were calculated.
Results: It was calculated that the PE and PVS significantly prevent the dose enhancement caused by dental materials. (p<0.05) There was no difference between impression materials in the photon-stopping properties. (p>0.05)
Conclusion: PE and PVS can be used as a scatter dose shield for the 2 Gy daily fractional dose. This study demonstrates the radiation-shielding property of PE for the first time.