Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Surface Roughness and Cariogenic Microbial Adhesion after Polishing of Smart Chromatic Technology-based Composite Resin

Smart Chromatic Technology 기반 복합 레진의 폴리싱 이후 표면 거칠기 및 우식원성 미생물 부착

  • Haesong Kim (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Juhyun Lee (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Haeni Kim (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Howon Park (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
  • 김해송 (강릉원주대학교 치과대학 소아.청소년치과학교실 및 구강과학연구소) ;
  • 이주현 (강릉원주대학교 치과대학 소아.청소년치과학교실 및 구강과학연구소) ;
  • 김해니 (강릉원주대학교 치과대학 소아.청소년치과학교실 및 구강과학연구소) ;
  • 박호원 (강릉원주대학교 치과대학 소아.청소년치과학교실 및 구강과학연구소)
  • Received : 2022.10.24
  • Accepted : 2022.11.27
  • Published : 2023.02.28
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Abstract

This study compared the surface roughness and microbial adhesion characteristics of Omnichroma, a novel composite resin developed using "smart chromatic technology", with those of two other conventional composite resins with different filler compositions. A total of 144 specimens were fabricated using 3 types of composite resins: Omnichroma (nano-spherical), Filtek Z350XT (nanofill), and Tetric N-Ceram (nanohybrid) and, divided into 3 groups of 48. Finishing was performed using tungsten carbide burs. Specimens were then divided into 3 subgroups using different polishing methods: Control, SofLex, and PoGo. Surface roughness was analyzed quantitatively and qualitatively using an atomic force microscope and a scanning electron microscope. Microbial adhesion was assessed by culturing Streptococcus mutans on the specimens for 24 hours and then measuring colony-forming units attached to the upper surface. The surface roughness (Ra) of Omnichroma was 0.123 ㎛ after finishing, and it exhibited a smooth surface compared to the other resins. However, after polishing, there were no significant differences in the surface roughness between the three composite groups, regardless of the polishing methods. The surfaces of the Control subgroups were significantly rougher than those of the SofLex subgroups in all 3 composite groups. However, except for Tetric N-Ceram, there were no significant differences between the Control and PoGo subgroups in the other composite groups. Microbial adhesion assessment showed no significant differences between any of the 3 composite resin subgroups; however, Omnichroma exhibited higher microbial adhesion than the other two composites. No significant correlation was observed between surface roughness and microbial adhesion.

본 연구는 "Smart chromatic technology"를 기반으로 새롭게 개발된 복합 레진인 Omnichroma의 폴리싱 이후 표면 거칠기와 우식원성 미생물 부착을 서로 다른 필러 조성을 가진 기존의 2가지 복합 레진과 비교 평가하였다. 세 종류의 복합 레진: Omnichroma (nano-spherical), Filtek Z350XT (nano-fill), Tetric N-Ceram(nanohybrid)을 사용하여 한 군 당 48개, 총 144개의 시편을 디스크 형태로 제작한 후, 텅스텐 카바이드 버를 이용하여 피니싱 처리하였다. 이후 대조군과 SofLex 디스크, PoGo 버에 따른 3가지 하위군으로 분류하였다. 표면 관찰은 원자 힘 현미경과 주사 전자 현미경을 이용하여 정량적, 정성적으로 분석하였다. 우식원성 미생물 부착은 Streptococcus mutans를 시편에 24시간 배양 후 표면에 부착한 집락 형성 단위를 측정하여 평가하였다. Omnichroma는 피니싱 처리만으로도 매끄러운 표면을 얻을 수 있었으며, 다른 두 가지 복합 레진보다 유의하게 낮은 표면 거칠기를 보였다. 그러나, 폴리싱 후에는 연마 방법과 상관없이 세 종류의 복합 레진의 표면 거칠기 사이에 유의한 차이가 없었다. 세 종류의 복합 레진 모두에서 SofLex 하위군은 대조 하위군에 비해 훨씬 매끄러운 표면을 나타냈다. 그러나, Tetric N-Ceram을 제외한 다른 두 복합 레진에서 대조 하위군과 PoGo 하위군의 표면 거칠기는 통계적으로 유의한 차이가 없었다. 미생물 부착은 세 종류의 복합 레진 각각의 하위군 사이에서 유의한 차이가 없었다. 그러나, Omnichroma는 다른 두 종류의 복합 레진에 비해 전반적으로 더 높은 미생물 부착을 보였다.

Keywords

References

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