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KMID : 1020220140140050783
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Journal of Korean Society of Dental Hygiene
2014 Volume.14 No. 5 p.783 ~ p.788
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Effect of non-thermal atmospheric pressure nitrogen andair plasma on the surface properties and the disinfection of denture base resin
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Seo Hye-Yeon
Yoo Eun-Mi
Choi Yu-Ri
Kim Soo-Hwa
Kim Kwang-Man
Kim Kyoung-Nam
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Abstract
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Objectives : The purpose of this study was to investigate the effect of non-thermal atmospheric pressure plasma jet(NTAPPJ) on surface properties and Streptococcus mutans disinfection of denture base resin.
Methods : Self-cured denture base resin (Jet denture repair resin, Lang dental Mfg, co., USA) was used to make specimen(12 mm × 2 mm). To observe surface change before and after plasma process, surface roughness and contact angle were measured. For sterilization experiments, the surfaces of specimens were treated with nitrogen and air NTAPPJ for 1 minute after S. mutans was inoculated on the material surfaces.
Results : Before plasma process, surface roughness of denture base resin was 0.21 §± 0.02 §. After air and nitrogen NTAPPJ process, surface roughness was 0.19 §± 0.03 §and 0.18 §± 0.01 §respectively. There was no significant difference(p>0.05). Contact angle of control group without plasma process was 83.81ß± 3.14ß, while after plasma treatment, contact angles of air NTAPPJ and nitrogen NTAPPJ groups were 63.29ß± 2.27ßand 46.68ß± 5.82ßrespectively. The result showed a significant decrease in contact angle after plasma process(p<0.05). Compared to the control group 6020.33(CFU/mL) without plasma process, CFU decreased significantly after air NTAPPJ 90.75(CFU/mL) and nitrogen NTAPPJ 80.25(CFU/mL) treatment(p<0.05).
Conclusions : It was considered that NTAPPJ can be used for denture disinfection without changing surface properties of materials.
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KEYWORD
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denture base resin, disinfection, non-thermal atmospheric pressure plasma
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