A STUDY ON THE EFFECT OF DENTIN ADHESIVE TO FLUORIDE RELEASE OF COMPOMER

상아질 결합제가 컴포머의 불소유리에 미치는 영향에 관한 연구

It is well known that glass-ionomer cement and compomer can release fluoride which can inhibit the progression of dental caries. The purposes of this study were to evaluate whether the fluoride from fluoride-containing filling materials can penetrate the dentin bonding adhesive and the dentin bonding adhesive can increase the bond strength of resin-modified glass ionomer. The amount of fluoride release from resin-modified glass ionomer and compomer was measured during 28 days of period and statistically analyzed by t-test. The bond strength of each material with/without dentin bonding adhesive was measured and also statistically analyzed by t-test. The distribution of fluoride from each material into the tooth was explored by electron probe microanalysis system(EPMA). The experimental teeth used were second primary molars about to exfoliate. The amount of fluoride release from each material was diminished by dentin bonding adhesive during 28 days(p<0.05) and the bond strength was not increased by dentin adhesive in resin-modified glass ionomer. The bond strength of group VI was not detectable. The distribution of fluoride from each material into teeth was according to dentino-enamel junction and dispersed into pulp from pulpal floor. The widest distribution was shown in resin-modified glass ionomer cement filled without the application of dentin bonding adhesive.

본 연구의 목적은 와동 충전시 충전재와 치질 사이에 개재되는 상아질 결합제가, 수복물에서 유리되는 불소가 와동 벽으로 침투하는 과정에 어떠한 영향을 주는지를 조사함이었고, 부가적으로 레진 강화형-글라스 아이오노머 시멘트의 접착에도 상아질 결합제를 도포 하는것이 치질과의 결합력을 강화시킬 수 있는지에 대해 평가하고자 하였다. Fuji II $LC^{(R)}$와 Dyract $AP^{(R)}$를 선정하여 상아질 결합제의 도포 여부에 따른 불소 유리량 측정과 전단 결합 강도를 비교분석하였으며, 치질 내로의 불소 침투 양상은 교환 시기에 있는 제2유구치에 Fuji II $LC^{(R)}$와 Dyract $AP^{(R)}$를 충전하고 3주내에 발거하여 EPMA로 분석하였다. 상아질 결합제는 불소 유리량을 현저하게 감소시키는 것으로 나타났으며(p<0.05) Fuji II $LC^{(R)}$의 경우 상아질 결합제의 도포가 결합강도를 증가시키지 못하였다. EPMA 분석결과 상아질 결합제는 충전재로부터 유리되어 나오는 불소가 치질 내로 확산되는 것을 방해하는 것으로 확인되었다.