Color stability of bulk-fill and incremental-fill resin-based composites polished with aluminum-oxide impregnated disks

다국어 초록 (Multilingual Abstract)

Objectives: This study aimed to evaluate the color stability of bulk-fill and nanohybrid resin-based composites polished with 3 different, multistep, aluminum-oxide impregnated finishing and polishing disks. Materials and Methods: Disk-shaped specimens (8 mm in diameter and 4 mm in thickness) were light-cured between two glass slabs using one nanohybid bulk-fill (Tetric EvoCeram, Ivoclar Vivadent), one micro-hybrid bulk-fill (Quixfil, Dentsply), and two nanohybrid incremental-fill (Filtek Ultimate, 3M ESPE; Herculite XRV Ultra, Kerr) resin-based composites, and aged by thermocycling (between 5 - 55°C, 3,000 cycles). Then, they were divided into subgroups according to the polishing procedure as SwissFlex (Coltène/Whaledent), Optidisc (Kerr), and Praxis TDV (TDV Dental) (n = 12 per subgroup). One surface of each specimen was left unpolished. All specimens were immersed in coffee solution at 37°C. The color differences (ΔE) were measured after 1 and 7 days of storage using a colorimeter based on CIE Lab system. The data were analyzed by univariate ANOVA, Mann-Whitney U test, and Friedmann tests (α = 0.05). Results: Univariate ANOVA detected significant interactions between polishing procedure and composite resin and polishing procedure and storage time (p < 0.05). Significant color changes were detected after 1 day storage in coffee solution (p < 0.05), except Quixfil/Optidisc which was color-stable after 7 days (p > 0.05). Polishing reduced the discoloration resistance of Tetric EvoCeram/SwissFlex, Tetric EvoCeram/Praxis TDV, Quixfil-SwissFlex, and all Herculite XRV Ultra groups after 7 days storage (p < 0.05). Conclusions: Discoloration resistance of bulk-fill resin-based composites can be significantly affected by the polishing procedures.

참고문헌 (Reference)

1 Gönülol N, "The effects of finishing and polishing techniques on surface roughness and color stability of nanocomposites" 40 (40): e64-e70, 2012

2 Da Costa J, "The effect of different polishing systems on surface roughness and gloss of various resin composites" 19 : 214-226, 2007

3 Jung M, "Surface texture of four nanofilled and one hybrid composite after finishing" 32 : 45-52, 2007

4 Borges AB, "Surface roughness of packable composite resins polished with various systems" 16 : 42-47, 2004

5 Marigo L, "Relation between conversion degree and cytotoxicity of a flowable bulk-fill and three conventional flowable resin-composites" 19 : 4469-4480, 2015

6 Ibarra ET, "Physical properties of a new sonically placed composite resin restorative material" 63 : 51-56, 2015

7 Fronza BM, "Monomer conversion, microhardness, internal marginal adaptation, and shrinkage stress of bulk-fill resin composites" 31 : 1542-1551, 2015

8 Rosatto CM, "Mechanical properties, shrinkage stress, cuspal strain and fracture resistance of molars restored with bulk-fill composites and incremental filling technique" 43 : 1519-1528, 2015

9 Alshali RZ, "Long-term sorption and solubility of bulk-fill and conventional resin-composites in water and artificial saliva" 43 : 1511-1518, 2015

10 Ilie N, "Investigations towards nanohybrid resin-based composites" 17 : 185-193, 2013

11 Rémond G, "Implications of polishing techniques in quantitative Xray microanalysis" 107 : 639-662, 2002

12 Sirin Karaarslan E, "Effects of different polishing methods on color stability of resin composites after accelerated aging" 32 : 58-67, 2013

13 Yazici AR, "Effects of delayed finishing/polishing on surface roughness, hardness and gloss of tooth-coloured restorative materials" 4 : 50-56, 2010

14 Lu H, "Effect of surface roughness on stain resistance of dental resin composites" 17 : 102-108, 2005

15 김은하, "Effect of resin thickness on the microhardness and optical properties of bulk-fill resin composites" 대한치과보존학회 40 (40): 128-135, 2015

16 Barakah HM, "Effect of polishing systems on stain susceptibility and surface roughness of nanocomposite resin material" 112 : 625-631, 2014

17 Ozgünaltay G, "Effect of finishing and polishing procedures on the surface roughness of new tooth-colored restoratives" 30 : 218-224, 2003

18 da Silva JM, "Effect of different finishing times on surface roughness and maintenance of polish in nanoparticle and microhybrid composite resins" 5 : 288-298, 2010

19 Dietschi D, "Comparison of the color stability of ten new-generation composites:an in vitro study" 10 : 353-362, 1994

20 Sepúlveda-Navarro WF, "Color stability of resins and nylon as denture base material in beverages" 20 : 632-638, 2011

21 Ergücü Z, "Color stability of nanocomposites polished with one-step systems" 33 : 413-420, 2008

22 Iazzetti G, "Color stability of fluoride-containing restorative materials" 25 : 520-525, 2000

23 Ilie N, "Bulk-fill resin-based composites: an in vitro assessment of their mechanical performance" 38 : 618-625, 2013

24 Hergott AM, "An evaluation of different composite resin systems finished with various abrasives" 119 : 729-732, 1989

25 Jefferies SR, "Abrasive finishing and polishing in restorative dentistry: a state-of-the-art review" 51 : 379-397, 2007