Polymerization of flowable composite core materials irradiated by super-high intensity light with short time

To evaluate the polymerization of dual-cured flowable composite core irradiated by super-high intensity light with short time. The light-proof silicon rubber cuboid mold with one end open was syringed and filled by dual-cured flowable resin composite core, then the open end of mold was irradiated di...

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Bibliographic Details
Published inShanghai kou qiang yi xue Vol. 25; no. 3; p. 261
Main Authors He, Shao-Wei, Geng, Teng-Yu, Meng, Xiang-Feng
Format Journal Article
LanguageChinese
Published China 01.06.2016
Subjects
Composite Resins
Curing Lights, Dental
Hardness
Light
Materials Testing
Polymerization
Surface Properties
Time Factors
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Summary:To evaluate the polymerization of dual-cured flowable composite core irradiated by super-high intensity light with short time. The light-proof silicon rubber cuboid mold with one end open was syringed and filled by dual-cured flowable resin composite core, then the open end of mold was irradiated directly by a light unit at 1000 mW/cm(2) ×10, ×20 s; or at 3200 mW/cm(2) × 3, ×6 s. The specimens were stored in the light-proof box. After irradiation for 1 h and 24 h, Knoop microhardness was measured along the vertical surfaces of specimens from 1mm to 10 mm depth at 1 mm interval. The data was analyzed by one-way ANOVA with SPSS 16.0 software package. 3200 mW/cm(2) ×3 s light irradiation did not initiate light curing of the specimens. The other three light irradiations could make specimens obtaining higher microhardness than that by pure chemical cure; however, the depth of specimens affected by light irradiation was limited. Within the area affected by light, the microhardness of specimens could be improved by
ISSN:1006-7248