본 연구는 코어용 이중 중합 레진의 중합도에 미치는 두께의 영향과 빛이 감소된 깊은 와동에서 자가 중합에 의한 영향을 조사하고자 하였다. Luxacore Dual과 Luxacore Self (DMG Inc, Hamburg, Germany) 두 종류의 코어용 레진 수복재를 지름 10 mm, 두께가 2, 4, 6, 8 mm 의 Teflon mold에 주입하고 자가중합 시키거나 혹은 $500 mW/cm^2$의 광도로 제조자의 지시에 따라 중합 후 $37^{\circ}C$ 증류수에 24시간동안 저장하였다. 각 시편의 윗면과 아랫면에서 Knoop's hardness를 측정하였다. 결과는 ANOVA로 통계 분석 하였고 Tukey's test로 사후 검정하였다. Luxacore Self와 Luxacore Dual을 자가중합 시킨 군의 중합도는 두께에 따른 영향을 받지 않았다. Luxacore dual을 광중합한 경우 중합은 2 mm, 4 mm와 6 (적층충전) mm군에서는 밑면의 효과적인 중합이 일어났으나 8 (적층충전) mm군, 6, 8 (단일충전) mm군은 밑면에서 불완전한 중합을 보였다 (p < 0.05). 따라서 이 실험 결과에 의하면 4 mm를 초과하는 경우 단일충전보다 적층충전이 더 좋은 것으로 나타났다.
본 연구는 코어용 이중 중합 레진의 중합도에 미치는 두께의 영향과 빛이 감소된 깊은 와동에서 자가 중합에 의한 영향을 조사하고자 하였다. Luxacore Dual과 Luxacore Self (DMG Inc, Hamburg, Germany) 두 종류의 코어용 레진 수복재를 지름 10 mm, 두께가 2, 4, 6, 8 mm 의 Teflon mold에 주입하고 자가중합 시키거나 혹은 $500 mW/cm^2$의 광도로 제조자의 지시에 따라 중합 후 $37^{\circ}C$ 증류수에 24시간동안 저장하였다. 각 시편의 윗면과 아랫면에서 Knoop's hardness를 측정하였다. 결과는 ANOVA로 통계 분석 하였고 Tukey's test로 사후 검정하였다. Luxacore Self와 Luxacore Dual을 자가중합 시킨 군의 중합도는 두께에 따른 영향을 받지 않았다. Luxacore dual을 광중합한 경우 중합은 2 mm, 4 mm와 6 (적층충전) mm군에서는 밑면의 효과적인 중합이 일어났으나 8 (적층충전) mm군, 6, 8 (단일충전) mm군은 밑면에서 불완전한 중합을 보였다 (p < 0.05). 따라서 이 실험 결과에 의하면 4 mm를 초과하는 경우 단일충전보다 적층충전이 더 좋은 것으로 나타났다.
The purpose of this study was to investigate the influence of thickness on the degree of cure of dual-cured composite core. 2, 4, 6, 8 mm thickness Luxacore Dual and Luxacore Self (DMG Inc, Hamburg, Germany) core composites were cured by bulk or incremental filling with halogen curing unit or self-c...
The purpose of this study was to investigate the influence of thickness on the degree of cure of dual-cured composite core. 2, 4, 6, 8 mm thickness Luxacore Dual and Luxacore Self (DMG Inc, Hamburg, Germany) core composites were cured by bulk or incremental filling with halogen curing unit or self-cure mode The specimens were stored at $37^{\circ}C$ for 24 hours and the Knoop's hardness of top and bottom surfaces were measured. The statistical analysis was performed using ANOVA and Tukey's test at p = 0.05 significance level. In self cure mode, polymerization is not affected by the thickness. In Luxacore dual, polymerization of the bottom surface was effective in 2, 4 and 6 (incremental) mm specimens. However the 6 (bulk) and 8 (bulk, incremental) mm filling groups showed lower bottom/top hardness ratio (p < 0.05). Within the limitation of this experiment, incremental filling is better than bulk filling in case of over 4 mm depth, and bulk filling should be avoided.
The purpose of this study was to investigate the influence of thickness on the degree of cure of dual-cured composite core. 2, 4, 6, 8 mm thickness Luxacore Dual and Luxacore Self (DMG Inc, Hamburg, Germany) core composites were cured by bulk or incremental filling with halogen curing unit or self-cure mode The specimens were stored at $37^{\circ}C$ for 24 hours and the Knoop's hardness of top and bottom surfaces were measured. The statistical analysis was performed using ANOVA and Tukey's test at p = 0.05 significance level. In self cure mode, polymerization is not affected by the thickness. In Luxacore dual, polymerization of the bottom surface was effective in 2, 4 and 6 (incremental) mm specimens. However the 6 (bulk) and 8 (bulk, incremental) mm filling groups showed lower bottom/top hardness ratio (p < 0.05). Within the limitation of this experiment, incremental filling is better than bulk filling in case of over 4 mm depth, and bulk filling should be avoided.
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문제 정의
Therefore the purpose of this study was to investigate the influence of thickness on the degree of cure when bulk filling was done with dual-cured composite core and whether there was enough polymerization occurred at the deep bot tom surface by self 이ue ability.
가설 설정
In this study, we investigated the influence of thickness on the degree of cure of selP and dual cured composite core materials when light and self activated.
제안 방법
light. As a control group of self-cure mode of Luxacore Dual, three of each 2, 4, 6, 8 mm specimens were made and cured in a dark room for 30 minutes. In Luxacore Self groups, they were filled with a bulk placement and cured for 4 minutes before removal.
The composite restoratives under test were placed in Teflon mold 10 mm in diameter and cylin drical cavities 2, 4, 6, 8 mm in depth4). The materi al placed in the mold cavity was confined between opposing cellulose acetate strips (KerrHawe striproll, Switzerland).
sandpaper51. The specimens were posi tioned centrally beneath the indentor of a digital microhardness tester (Future-Tech Corp, Tokyo, Japan) to assess Knoop s hardness (KHN) of the top and bottom surfaces. A 25 gf load was applied through the indentor with a dwell time of 10 sec onds.
대상 데이터
Two composites core materials, Luxacore Dual and Luxacore Self (DMG Inc, Hamburg, Germany) of shade blue were chosen (Table 1).
데이터처리
The statistical analysis was performed using one-way analysis of variance (ANOVA) and Tukey s test at a p = 0.05 significance level.
참고문헌 (18)
Soh MS, Yap AUJ & Siow KS. Effectiveness of composite cure associated with different curing modes of LED lights. Oper Dent 28:371-377, 2003
Bala O, Uctasli MB & Tuz MA. Barcoll hardness of different resin-based composites cured by halogen or light emitting diode (LED). Oper Dent 30:69-74, 2005
Pilo R & Cardash HS. Post-irradiation polymerization of different anterior and posterior visible light-activated resin composites. Dent Mater 8:299-304, 1992
Laiza T Poskus, Elinane Placido & Paulo E Capel Cardoso. Influence of placement techniques on vickers and knoop hardness of class II composite resin restorations. Dent Mater 20:726-732, 2004
Jandt KD, Mills RW, Blackwell GB & Ashworth SH. Depth of cure and compressive strength of dental composites cured with blue light emitting diodes (LEDs). Dent Mater 16:41-47, 2000
Ruyter IE & oysaed H. Conversion in different depths of ultraviolet and visible light activated composite materials. Acta Odontol Scand 40:179-192, 1982
Lovell LG, Newman SM & Bowman CN. The effects of light intensity, temperature, and comonomer composition on the polymerization behavior of dimethacrylate dental resins. J Dent Res 78:1469-1476, 1999
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