Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
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Effect of fabrication method and surface polishing on the surface roughness and microbial adhesion of provisional restoration

임시 수복물의 제작 방식과 표면 연마가 표면 거칠기와 세균 부착에 미치는 영향

  • Yeon-Ho Jung (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Hyun-Jun Kong (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Yu-Lee Kim (Department of Prosthodontics, College of Dentistry, Wonkwang University)
  • 정연호 (원광대학교 치과대학 치과보철학교실) ;
  • 공현준 (원광대학교 치과대학 치과보철학교실) ;
  • 김유리 (원광대학교 치과대학 치과보철학교실)
  • Received : 2024.07.12
  • Accepted : 2024.07.29
  • Published : 2024.08.31
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Abstract

Purpose: This study aims to investigate the effects of provisional restoration fabrication methods and surface polishing on surface roughness and microbial adhesion through in vitro experiments. Materials and Methods: 120 cylindrical provisional restoration resin blocks (10 × 10 × 2.5 mm) were manufactured according to four fabrication methods, and 30 specimens were assigned to each group. Afterwards, they were divided into non-polishing group, #400 grit SiC polishing group, and #800 grit SiC polishing group and polished to a 10 × 10 × 2 mm specimen size (n = 10). The surface roughness Ra and Ry of the specimen was measured using a Surface Roughness Tester. Three specimens were extracted from each group and were coated with artificial saliva, and then Streptococcus mutans were cultured on the specimens at 37℃ for 4 hours. The cultured specimens were fixed to fixatives and photographed using a scanning electron microscope. For statistical analysis, the two way of ANOVA was performed for surface roughness Ra and Ry, respectively, and the surface roughness was tested post-mortem with a Scheffe test. Results: The fabrication method and the degree of surface polishing of the provisional restorations had a significant effect on both surface roughness Ra and Ry, and had an interaction effect. There was no significant difference in Ra and Ry values in all polishing groups in DLP and LCD groups. Conclusion: The fabrication method and surface polishing of the provisional restoration had a significant effect on surface roughness and showed different adhesion patterns for S. mutans adhesion.

목적: 본 연구의 목적은 임시 수복물의 제작 방법과 표면 연마가 표면 거칠기와 세균 부착에 미치는 영향을 in vitro 실험을 통해 알아보고자 함이다. 연구 재료 및 방법: 120개의 원통형 임시 수복 레진 블록(10 × 10 × 2.5 mm)을 네 가지 제작 방식(Conventional, CAD/CAM milling, DLP 3D printing, LCD 3D printing)에 따라 제작하였고, 각 군당 30개의 시편을 배정하였다. 이후 연마를 시행하지 않은 군(NP), #400 grit SiC 연마군, #800 grit SiC 연마군으로 나누어 10 × 10 × 2 mm 시편 사이즈가 되도록 연마하였다(n = 10). 표면조도측정기(Surftest Extreme SV-3000S4, Mitutoyo, Kanagawa, Japan)를 이용하여 시편의 표면 거칠기 Ra와 Ry를 측정하였다. 각 군에서 3개의 시편을 추출하여 시편을 인공 타액으로 코팅 후, 시편에 Streptococcus mutans를 4시간 동안 37℃에서 배양하였다. 배양한 시편을 고정액에 고정시켜 주사전자현미경(S-4800, Hitachi, Chiyoda, Japan) 사진을 촬영하였다. 통계 분석은 표면 거칠기 Ra, Ry에 대해 각각 two-way ANOVA (P = 0.05) 후 Scheffe test (P = 0.05)로 사후 검정 시행하였다. 결과: 임시 수복물의 제작 방식과 표면 연마 정도는 표면 거칠기 Ra와 Ry 모두에 유의한 영향을 주었고, 상호작용 효과가 있었다. Ra 값은 NP 군에서 제작 방식에 따라 유의한 차이가 있었다. Ry 값은 NP, #800 군에서 제작 방식에 따라 유의한 차이가 있었다. DLP와 LCD 군은 모든 연마군에서 Ra, Ry 값이 유의한 차이가 없었다. 결론: 임시 수복물의 제작 방식과 표면 연마는 표면 거칠기에 유의한 영향을 보였고 S. mutans 부착에 대해 다른 부착 양상을 보였다.

Keywords

Acknowledgement

이 논문은 2023학년도 원광대학교 교비지원에 의해서 연구됨.

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