수종의 광중합기를 이용한 교정용 광중합형 글라스 아이오노머 시멘트의 전단 결합 강도에 관한 연구
A study on the shear bond strengths of visible light-cured glass ionomer cement with several light-curing units
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초록
본 연구에서는 세 가지 서로 다른 광원(할로겐 램프 : Elipar Trilight ; 3M ESPE, Seefeld, Germany, Light Emitting Diode (LED) : Elipar Freelight2 ; 3M ESPE, Seefeld, Germany, 플라즈마 광 : Flipo ; LOKKI, France)을 사용하여 브라켓과 광원사이의 거리에 따른 광중합형 글라스 아이오노머 시멘트(Fuji ORTHO LC : GC, Japan)의 전단 결합 강도를 알아보고자 하였다. 1. 광중합기에 따른 전단 결합 강도는 광중합기로부터 브라켓까지의 거리가 0mm일 때, 3 가지 광원에 유의할 만한 차이는 보이지 않았고 광중합기로부터 브라켓까지의 거리가 3mm, 6mm일 때, 할로겐 광과 플라즈마 광 사이에는 유의할 만한 차이가 없었으나 LED 광은 유의성 있게 낮은 전단 결합 강도를 나타냈다. 2. 할로겐 광과 플라즈마 광으로 광중합시 거리에 따른 전단 결합 강도에 유의한 차 없었고 LED 광을 사용하여 광중합시에는 거리가 증가할수록 전단 결합 강도가 감소하였다. 특히 0mm에서 3mm로 거리가 증가시 유의할 만한 감소를 나타내었다.
Abstract
The purpose of this study was to assess the effect of light-tip distance on the shear bond strength of a visible light-cured glass ionomer cement(Fuji Ortho LC ; GC, Japan) cured with three different light curing units : a halogen light(Elipar Trilight ; 3M ESPE, Seefeld, Germany), a Light Emitting Diode (LED, Elipar Freelight2 ; 3M ESPE, Seefeld, Germany) and a plasma arc light (Flipo ; LOKKI, France). 1. When used at a distance of 0mm from the bracket, the three light curing units showed no statistically different shear bond strengths. At distance of 3 and 6mm, no significant differences were found between the halogen and plasma arc lights, but both had significantly higher shear bond strengths than the LED light. 2. The halogen light and plasma arc light showed that no significant differences in bond strength were found among the three distances. Using the LED light, a greater light-tip distance produced significantly lower shear bond strengths.
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