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논문 기본 정보

자료유형
학술저널
저자정보
Yoon Lee (Yonsei University) Jung-Soo Woo (Seoul National University) Soo-Heang Eo (Korea University) Deog-Gyu Seo (Seoul National University)
저널정보
대한치의학회 Journal of Korean Dental Science Journal of korean dental science Vol.8 No.2
발행연도
2015.12
수록면
82 - 88 (7page)

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Purpose: To evaluate the effect of light-curing on the immediate and delayed micro-shear bond strength (μSBS) between yttria-tetragonal zirconia polycrystal (Y-TZP) ceramics and RelyX Ultimate when using Single Bond Universal (SBU).
Materials and Methods: Y-TZP ceramic specimens were ground with #600-grit SiC paper. SBU was applied and RelyX Ultimate was mixed and placed on the Y-TZP surface. The specimens were divided into three groups depending on whether light curing was done after adhesive (SBU) and resin cement application: uncured after adhesive and uncured after resin cement application (UU); uncured after adhesive, but light cured after resin cement (UC); and light cured after adhesive and light cured resin cement (CC). The three groups were further divided depending on the timing of µSBS testing: immediate at 24 hours (UUI, UCI, CCI) and delayed at 4 weeks (UUD, UCD, CCD). μSBS was statistically analyzed using one-way ANOVA and Student-Newman-Keuls multiple comparison test (P<0.05). The surface of the fractured Y-TZP specimens was analyzed under a scanning electron microscope (SEM).
Result: At 24 hours, µSBS of UUI group (8.60±2.06 MPa) was significantly lower than UCI group (25.71±4.48 MPa) and CCI group (29.54±3.62 MPa) (P<0.05). There was not any significant difference between UCI and CCI group (P>0.05). At 4 weeks, µSBS of UUD group (24.43±2.88 MPa) had significantly increased over time compared to UUI group (P<0.05). The SEM results showed mixed failure in UCI and CCI group, while UUI group showed adhesive failure.
Conclusion: Light-curing of universal adhesive before or after application of RelyX Ultimate resin cement significantly improved the immediate μSBS of resin cement to air-abrasion treated Y-TZP surface. After 4 weeks, the delayed μSBS of the non-light curing group significantly improved to the level of light-cured groups.

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Introduction
Materials and Methods
Result
Discussion
Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2016-515-002234312