• 한국콘텐츠학회논문지
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• 제22권3호
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• pp.586-592
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• 2022

본 연구는 기존의 치면열구전색재 ConciseTM에 세륨옥사이드 나노입자(Cerium oxide nano particles; CNPs)를 0-4.0 wt%를 첨가하여 새로운 치면열구전색재를 제조하여 물리적 성질과 세포독성을 평가하였다. 물리적 성질은 중합깊이, 물흡수도와 용해도를 측정하였고 세포독성평가는 불멸화된 구강점막세포(Immortalized human oral keratinocyte (IHOK))를 이용하여 MTT assay법으로 평가하였다. 실험 결과 중합 깊이는 CNPs 첨가량이 증가할수록 감소하였고, 용해도는 CNPs를 2.0 wt% 첨가된 실험군에서 가장 낮은 값을 보였으며 물흡수도는 각 실험군별 유의한 차이는 나타나지 않았다(p>0.05). 세포독성 실험 결과는 모든 실험군에서 높은 세포 생존율을 보였다. 이는 CNPs가 물리적 성질을 크게 약화 시키지 않으며 세포독성을 나타내지 않았으므로 생체 적합성을 입증하였다. CNPs의 특성을 고려하여 향후 CNPs의 효율적인 분산 기술에 대한 추가 연구가 필요할 것으로 사료된다.

• 한국치위생학회지
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• 제20권4호
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• pp.535-543
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• 2020

Objectives: The aim of this study was to investigated the surface roughness and change in the amount of adhesion of Streptococcus mutans to the commercial pit and fissure sealant containing cerium oxide nano particles(CNPs). Methods: The CNPs was incorporated into a commercial pit and fissure sealant at 0-4.0 wt%. Disk Specimens (ϕ 10 mm × 2 mm) were prepared by light polymerization the front and back for 40s. Average surface roughness was measured and Streptococcus mutans adhesion was observed under confocal laser scanning microscopy (CLSM) after 24 hour. Data were statistically analyzed by one-way ANOVA and Tukey HSD^a post-hoc test. Results: Difference of the surface roughness(Ra) between groups was not statistically significant in both non CNPs group and CNPs group(p>0.05). In CNPs group, the amount of S. mutans adhesion was significantly different between control group and decreased in order of CNPs 4.0, CNPs 0.5, CNPs 1.0 and CNPs 2.0(p<0.05). Conclusions: Within the limitation of this study, these aspects of oral bacteria performances suggest potential usefulness of the CNPs incorporation, especially CNPs 1% and 2%, in pit and fissure sealant for inducing antibacterial effect.