Erosive Effect and Color of Mouthrinsing Solutions on Enamel Surface

시판중인 구강양치용액의 법랑질 표면의 착색과 침식에 미치는 영향

  • Received : 2011.06.23
  • Accepted : 2011.10.14
  • Published : 2011.10.31

Abstract

The aims of this study were to evaluate the effect of native acidity upon dental hard tissues by measuring pH in mouth-rinse, which is on the market, and to evaluate even influence of dental stain caused by mouse-rinse given using for a long time. The experimental group was used Garglin, Nextcare, Listerine, and Hexamedin. The control group was used sterile distilled water. As a result, pH was indicated to be low in Nextcare(4.70) and Listerine(4.16). In a change of color tone, $b^*$ value of indicating Yellow-blue showed the lower value than the early color tone in all groups. There was statistical significance in Nextcare and Listerine. ${\Delta}L^*$ value of indicating light -dark gets darker after using Nextcare, Listerine and Hexamedine. A change(VHN) in surface hardness of enamel showed reduction in surface hardness after 14 days in Nexcare and Listerine. As a result of confirming a change in enamel surface by using Scanning Electron Microscopy, the erosion aspect on the enamel surface could be confirmed in groups of Nexcare and Listerine. Ra value in surface roughness of enamel could be observed the enamel surface, which got rougher compared to other experimental groups.

최근 구강관리에 대한 관심이 증가하면서 시판되고 있는 구강양치용액의 종류도 다양해지고 있고 휴대가 간편하여 쉬운 사용방법으로 활용이 급진적으로 증가하고 있다. 본 연구에서는 시판 중인 구강양치용액의 pH를 측정하여 고유 산도가 법랑질 표면의 색조변화, 미세경도, 미세구조 변화, 거칠기 측정 등에 관한 실험방법을 통하여 구강양치용액의 효과를 평가하였다. 1. 색조변화는 Nextcare와 Listerine에서 light-dark를 나타내는 $L^*$값은 0에 가깝게 어두워졌으며 yellow-blue를 나타내는 $b^*$값은 초기값과 비교하여 채도가 낮아졌다. 특히 Listerine에서 ${\Delta}L^*$, ${\Delta}b^*$ 각각 -6.70, -7.20으로 가장 큰 변화를 보였다. 2. 표면경도 측정에서는 Nextcare와 Listerine에서 모두 통계적으로 유의한 감소를 보였다(p<0.05). 또한 표면의 형상과 거칠기에서도 Nextcare와 Listerine에서 다른 실험군과 비교하여 법랑질 표면의 붕괴 및 침식양상과 함께 거칠기가 매우 높아졌음을 알 수 있었다. 결론적으로, 현재 시판 중인 구강양치용액의 pH를 측정하여 고유 산도가 치아 경조직에 미치는 영향에 대해 알아본 결과, 산성의 pH를 가진 구강양치용액을 장기간 사용시 치면 착색 및 법랑질 표면의 영향을 줄 수 있으므로 적절한 사용법을 숙지하여 단기간 사용하는 것이 안전할 것으로 사료된다.

Keywords

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