Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Effects of Polishing Methods on the Surface Characteristics of Composite Resins

연마방법에 따른 복합레진의 표면특성 평가

  • Baik, Min-Kyung (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Kim, Chong-Chul (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Jang, Ki-Taeg (Department of Pediatric Dentistry, School of Dentistry, Seoul National University)
  • 백민경 (서울대학교 치의학대학원 소아치과학교실) ;
  • 김종철 (서울대학교 치의학대학원 소아치과학교실) ;
  • 장기택 (서울대학교 치의학대학원 소아치과학교실)
  • Received : 2015.10.05
  • Accepted : 2015.11.26
  • Published : 2016.08.31
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Abstract

The aim of this study was to evaluate the surface characteristics of composite resins polished with two different polishing methods. 30 disk-shaped specimens were prepared with microhybrid (Filtek$^{TM}$ Z250) and nanofilled (Filtek$^{TM}$ Z350) resins respectively, and classified into three groups: not polished as controls, polished by an abrasive disk (Soflex), and polished by a polishing brush (Occlubrush). Surface roughness was increased after polishing. In terms of micro-roughness, there were no significant differences between the two polishing methods. But macro-roughness values were markedly increased in the Occlubrush group (p < 0.05). In the Sof-lex group, the matrix and fillers were polished together, resulting into a smoother and homogeneous surface. However, in the Occlubrush group, the matrix layer was torn off, with more heterogeneous surfaces and large scratches. In regards to micro-hardness, no significant differences were observed between the two polishing systems (p > 0.05). And the hardness value increased about 25% after polishing. In conclusion, the method of polishing should be chosen deliberately in view of the hardness characteristics of composite resins. Sof-lex is recommended to improve the surface characteristics of polished resins.

본 연구는 복합레진의 연마방법에 따른 표면특성을 평가하기 위해, microhybrid 레진(Filtek$^{TM}$ Z250)과 nanofill 레진(Filtek$^{TM}$ Z350)을 연마 전, abrasive disk(Sof-lex) 연마 후, polishing brush(Occlubrush) 연마 후로 나누어 분석하였다. 그 결과 레진 표면조도는 연마 후 증가하였는데, 미세조도는 연마방법에 따른 차이가 없었으나 거시조도는 Occlubrush를 이용한 경우 현저하게 커졌다(p < 0.05). Sof-lex 연마의 경우 레진의 filler까지 연마되어 표면이 보다 균일한 형상을 보였으나 Occlubrush 연마시편은 기질층이 뜯겨져 나간 불균일한 형상을 보였다. 두 연마방법 간의 미세경도 유의차는 없었으며(p > 0.05), 연마 후 경도 값이 약 25% 상승하였다. 결론적으로, 복합레진의 표면경도 향상을 위하여 적합한 연마가 필요하며, Sof-lex를 이용한 연마가 더 우수한 것으로 사료된다.

Keywords

References

  1. Ferracane JL : Resin composite - state of art. Dent Mater, 27:29-38, 2011. https://doi.org/10.1016/j.dental.2010.10.020
  2. Yap AU : Occlusal contact area (OCA) wear of two new composite restoratives. J Oral Rehabil, 29:194-200, 2002. https://doi.org/10.1046/j.1365-2842.2002.00814.x
  3. Yildiz E, Sirin KE, Usumez A, et al. : Color stability and surface roughness of polished anterior restorative materials. Dent Mater J, 34:629-39, 2015. https://doi.org/10.4012/dmj.2014-344
  4. Kim KH, Ong JL, Okuno O : The effect of filler loading and morphology on the mechanical properties of contemporary composites. J Prosthet Dent, 87:642-9, 2002. https://doi.org/10.1067/mpr.2002.125179
  5. Koupis NS, Marks LA, Martens LC, et al. : Review: finishing and polishing procedures of (resin-modified) glass ionomers and compomers in paediatric dentistry. Eur Arch Paediatr Dent, 8:22-8, 2007. https://doi.org/10.1007/BF03262566
  6. Peyton JH : Finishing and polishing techniques: direct composite resin restorations. Pract Proced Aesthet Dent, 16:293-8, 2004.
  7. Bollen CM, Lambrechts P, Quirynen M : Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dent Mater, 13:258-69, 1997. https://doi.org/10.1016/S0109-5641(97)80038-3
  8. Reis AF, Giannini M, Ambrosano GM, et al. : Effects of various finishing systems on the surface roughness and staining susceptibility of packable composite resins. Dental Mater, 19:12-18, 2003. https://doi.org/10.1016/S0109-5641(02)00014-3
  9. Da Costa J, Ferracane J, Roeder L, et al. : The effect of different polishing systems on surface roughness and gloss of various resin composites. J Esthet Restor Dent, 19:214-24, 2007. https://doi.org/10.1111/j.1708-8240.2007.00104.x
  10. Erdermir U, Sancakli HS, Yildiz E : The effect of one-step and multi-step polishing systems on the surface roughness and microhardness of novel resin composites. Eur J Dent, 6:198-205, 2012.
  11. Giacomelli L, Derchi G, Frustaci A, et al. : Surface roughness of commercial composites after different polishing protocols: an analysis with atomic force microscopy. Open Dent J, 4:191-4, 2010. https://doi.org/10.2174/1874210601004010191
  12. Barbosa SH, Zanata RL, Nunes OB, et al. : Effect of different finishing and polishing techniques on the surface roughness of microfilled, hybrid and packable composite resins. Braz Dent J, 16:39-44, 2005. https://doi.org/10.1590/S0103-64402005000100007
  13. St-Georges AJ, Bolla M, Stamatiades PJ, et al. : Surface finish produced on three resin composites by new polishing systems. Oper Dent, 30:593-7, 2005.
  14. Yap AU, Yap SH, Ng JJ, et al. : Finishing/polishing of composite and compomer restoratives: effectiveness of one-step systems. Oper Dent, 29:275-9, 2004.
  15. Lu H, Roeder LB, Powers JM : Effect of polishing systems on the surface roughness of microhybrid composites. J Esthet Restor Dent, 15:297-303, 2003. https://doi.org/10.1111/j.1708-8240.2003.tb00300.x
  16. Paravina RD, Roeder L, Powers JM, et al. : Effect of finishing and polishing procedures on surface roughness, gloss and color of resin-based composites. Am J Dent, 17:262-6, 2004.
  17. Ryba TM, Dunn WJ, Murchison DF : Surface roughness of various packable composites. Oper Dent, 27:243-7, 2002.
  18. Kakaboura A, Fragouli M, Silikas N, et al. : Evaluation of surface characteristics of dental composites using profilometry, scanning electron, atomic force microscopy and gloss-meter. J Mater Sci Mater Med, 18:155-63, 2007. https://doi.org/10.1007/s10856-006-0675-8
  19. Chandler HH, Bowen RL, Paffenbarger GC : Method for finishing composite restorative materials. J Am Dent Assoc, 83:344-8, 1971. https://doi.org/10.14219/jada.archive.1971.0311
  20. Christensen R, Christensen G : Comparison of instruments and commercial pastes used for finishing and polishing composite resin. Gen Dent, 29:40-5, 1981.