• Title, Summary, Keyword: 뮤탄스균

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Mechanical properties and antibacterial effects on Streptococcus mutans of composite resins containing phytoncide (피톤치드를 함유한 복합레진의 기계적 특성 및 Streptococcus mutans에 대한 항균 효과)

  • Lee, Myung-Jin;Kim, Dan-Bi;Kim, Ji-Eun;Moon, Seung-Ha;Son, Ji-Young;Lee, Eun-Young;Kwon, Jae-Sung
    • Journal of Korean society of Dental Hygiene
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    • v.19 no.4
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    • pp.467-477
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    • 2019
  • Objectives: The aim of this study is to investigate the mechanical properties and antibacterial effects on Streptococcus mutans of composite resins containing phytoncide. Methods: Phytoncide was mixed with commercial composite resins at 0 (control), 1.25, 2.5, 3.75, and 5.0 weight percentage (wt%). Mechanical properties related to composite resins such as surface hardness, depth of cure, and flexural strength were measured. Antibacterial effects of composite resins were analyzed by using Streptococcus mutans (ATCC 25175). The results were analyzed by one-way analysis of variance followed by Tukey's test (p<0.05). Results: Composite resins that contain low wt% of phytoncide demonstrated no significant difference in surface hardness, depth of cure, and flexural strength (p>0.05). However, composite resins that contain high wt% of phytoncide had significantly decreased mechanical properties (p<0.05). In terms of antibacterial effects, composite resins containing phytoncide inhibited the growth of S. mutans. Conclusions: Our findings suggest that novel composite resins containing phytoncide have effective antibacterial properties while maintaining the originally important mechanical features of composite resins.

Effect of Physical Properties and Bacterial Adherence Inhibition of Pit and Fissure Sealant Containing Bioactive Glass Nano Particles(BGn) (생체활성 유리 나노입자 첨가량에 따른 치면열구전색제의 물성평가와 세균부착 억제 효과)

  • Jun, Soo-Kyung;Kim, Dong-Ae
    • The Journal of the Korea Contents Association
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    • v.18 no.3
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    • pp.542-549
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    • 2018
  • In this study BGn-incorporated non-fluoride release of pit and fissure sealant $Concise^{TM}$ was developed to improve the mechanical properties and promote antibacterial effect of fit and fissure sealant with the original material. The mechanical properties and antibacterial activity of BGn incorporating vary-ing amounts bioactive glass nano particles(BGn) (0,0.5,1.0 and 2.0 wt% in sealant) were characterized composition of the resulting were investigated. The solubility to aid absorption was calculated by weighing specimens with a diameter of 10 mm and a thickness of 2 mm according to ISO 4049 (2009). The antimicrobial effect was evaluated using three strains of S. mutans, S. aureus and E. coli. The absorbance of the test results was as high as the addition of BGn increased, and the lower the solubility as the solubility was added(p<0.05). Adhesion experiment results S. mutans in contrast to the control group $Concise^{TM}$, BGn-added experimental group showed a somewhat lower adherent surface but no statistically significant difference was observed (p<0.05). However S. aureus and E. coli statistical analysis indicated a significant difference for antibacterial agents between control and BGn containing(p<0.05). It seems that this BGn proved that even a antibacterial effect was demonstrated. Therefore, it was suggest that the additional effects of BGn and research on a wide range of substances.

Antibacterial and Mechanical Properties of Glass Ionomer Cements Containing Functionalized Multi-wall Carbon Nanotube(MWCNT) (기능화 다중벽 탄소나노튜브를 첨가한 글라스아이오노머 시멘트의 항균효과 및 기계적 성질)

  • Jeong, Mi-Ae;Kim, Dong-Ae
    • The Journal of the Korea Contents Association
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    • v.17 no.10
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    • pp.300-306
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    • 2017
  • The purpose of this study was to investigate the antibacterial effect of functional multiwall carbon nanotube (MWCNT) on the conventional glass ionomer cement(GIC). The MWCNT was incorporated into a commercial powder at 0.125, 0.25, 0.5 and 1.0 wt%. Specimens for vickers hardness(VHN) disks(Ø$10mm{\times}2mm$) each were prepared. Indention were made using a load of 200 N and 20 s dwell on four specimens for each distilled water storage time 1d, 7d, and 14days. The antibacterial effects using agar diffusion test with S. mutans and S. aureus. The diameters of the inhibition zones produced around the materials were measured. The results revealed that all the vickers hardness values were increase significantly with incubation time(p<0.05). Regarding the antibacterial effect for S. mutans, all the tested groups showed a slightly higher value not significantly with the control group(p<0.05). However S. aureus statistical analysis indicated a significant difference for antibacterial agents between control and MWCNT containing 0.25 wt%(p<0.05). These results of this study provide that the conventional GIC with containing MWCNT show good antibacterial effect against and favorable mechanical properties. Further this study on the efficient functionalization of multiwall carbon nanotube will be needed.