Shielding property of different prosthetic materials to shield radiation of 125I seed

VernacularTitle:基托材料对125I粒子屏蔽效果的初步研究
Author: Yang BAI ¹ ; Yan-Yi WANG ; Lei ZHANG ; Rong-Fa BU
Author Information

1. 解放军总医院
Keywords: Dental materials; Shield; Brachytherapy; 125I
From: Chinese Journal of Stomatology 2011;46(8):502-504
CountryChina
Language:Chinese
Abstract: Objective To investigation the shielding property to 125I of several different prosthetic materials used in clinical when prostheses are used as carriers of 125I seed in tumor treatment. Methods125I seeds were taken as the radiation sources to establish a model in vitro and the radiation doses were measured by thermoluminescent dosemeters(TLD). The shielding property of titanium plate, cochrome plate, and poly methyl methacrylate(PMMA) plate were detected, calculated and compared with that of plumbum plate in the control group. Results The radiation doses of the radiation source at 10 mm distance through the following materials were measured, and the results are 2.805 mGy (0.09 mm thick titanium plate), 1.082 mGy (0.48 thick titanium plate),0.390 mGy (0.41 mm thick cochrome plate), and 0.261 mGy (0.67 mm′s cochrome plate), and 2.885 mGy (1.685 mm thick PMMA plate). ConclusionsThe shield property of cochrome is optimal. The poly methyl methacrylate behaves to some extend as a shield to the 125I seed which can shield the radiation as the effects of plumbum when adopted together with the 0.557 mm′s(or more)titanium plate.