放射線照射が歯冠修復用硬質レジンおよびレジンセメントの物性におよぼす影響

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  • Effect of X-ray irradiation on composite resin for crown restoration and resin cement properties

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This study aimed to evaluate the properties composite resin for crown restoration and resin cement after X-ray irradiation. A commercial composite resin for crown restoration, Estenia C&B DA3 (EST: Kuraray, Tokyo, Japan), and a resin cement, Panavia F2.0 (PAN: Kuraray, Tokyo, Japan), were selected and irradiated at 10 and 100 Gy. The effects of irradiation compared to control (no-irradiation, 0 Gy) were evaluated using the three-point bending test according to ISO 4049. The flexural strengths±s.d. of EST and PAN of no irradiation (0 Gy) were 183.31±16.41 and 89.62±7.41 MPa, respectively and those irradiated with 10 Gy were 180.66±20.59 and 87.28±7.55 MPa, respectively. All pastes irradiated with 100 Gy except Paste B of PAN were already almost cured and could not be evaluated. These results suggested that the effect of X-ray irradiation with less than 10 Gy to composite resin paste had no significant effect.

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