Restor Dent Endod.  2017 Nov;42(4):309-315. 10.5395/rde.2017.42.4.309.

Effect of water storage on flexural strength of silorane and methacrylate-based composite resins

• Panahandeh N
• Torabzadeh H
• Naderi H
• Sheikh-Al-Eslamian SM

• KMID: 2403072
• DOI: http://doi.org/10.5395/rde.2017.42.4.309

Abstract

OBJECTIVES
This study assessed the effect of water storage on the flexural strength (FS) of low shrinkage composites.
MATERIALS AND METHODS
A total of 165 bar-shaped specimens (2 × 2 × 25 mm) were fabricated of 2 low shrinkage composites (Filtek P90 [3M ESPE], GC Kalore [GC International]) and a conventional methacrylate-based composite (Filtek Z250 [3M ESPE]). The specimens were subjected to 3-point bending test at 6 time intervals, namely: immediately after curing, at 24 hours, 1 week, 1 month, 6 months, and 1 year following storage in wet and dry conditions. The FS of the specimens were measured by applying compressive load at a crosshead speed of 1.0 mm/min. Data was analyzed using 3-way analysis of variance (ANOVA) and Tukey's test.
RESULTS
Three-way ANOVA revealed significant interactions between time, type of composite, and storage condition (p = 0.001). Tukey's multiple comparison test revealed significant reductions in FS of all composites after 6 months and 1 year of storage in distilled water compared to dry condition.
CONCLUSIONS
Filtek P90 showed the highest and GC Kalore showed the lowest FS after 1 year storage in distilled water. The immediate high strength of Filtek Z250 significantly decreased at 1 year and its final value was lower than that of Filtek P90.

Keyword

Composite resins; Flexural strength; Polymers; Silorane resins; Water storage

MeSH Terms

Composite Resins*
Polymers
Silorane Resins*
Water*
Composite Resins
Polymers
Silorane Resins
Water

Reference

1. Scotti N, Comba A, Gambino A, Paolino DS, Alovisi M, Pasqualini D, Berutti E. Microleakage at enamel and dentin margins with a bulk fills flowable resin. Eur J Dent. 2014; 8:1–8. PMID: 24966739.

2. Eick JD, Smith RE, Pinzino CS, Kostoryz EL. Stability of silorane dental monomers in aqueous systems. J Dent. 2006; 34:405–410. PMID: 16288948.

3. Cramer NB, Stansbury JW, Bowman CN. Recent advances and developments in composite dental restorative materials. J Dent Res. 2011; 90:402–416. PMID: 20924063.

4. Sheikh-Al-Eslamian SM, Panahandeh N, Najafi-Abrandabadi A, Hasani E, Torabzadeh H, Ghassemi A. Effect of decontamination on micro-shear bond strength of silorane-based composite increments. J Investig Clin Dent. 2017; 8:e12196.

5. Kim EH, Jung KH, Son SA, Hur B, Kwon YH, Park JK. Effect of resin thickness on the microhardness and optical properties of bulk-fill resin composites. Restor Dent Endod. 2015; 40:128–135. PMID: 25984474.

6. Czasch P, Ilie N. In vitro comparison of mechanical properties and degree of cure of bulk fill composites. Clin Oral Investig. 2013; 17:227–235.

7. Ilie N, Bucuta S, Draenert M. Bulk-fill resin-based composites: an in vitro assessment of their mechanical performance. Oper Dent. 2013; 38:618–625. PMID: 23570302.

8. Hirano S, Hirasawa T. Creep on a composite resin in water. Dent Mater J. 1989; 8:93–99. PMID: 2638964.

9. Garoushi S, Kaleem M, Shinya A, Vallittu PK, Satterthwaite JD, Watts DC, Lassila LV. Creep of experimental short fiber-reinforced composite resin. Dent Mater J. 2012; 31:737–741. PMID: 23037835.

10. Porto IC, de Aguiar FH, Brandt WC, Liporoni PC. Mechanical and physical properties of silorane and methacrylate-based composites. J Dent. 2013; 41:732–739. PMID: 23735601.

11. Ito S, Hashimoto M, Wadgaonkar B, Svizero N, Carvalho RM, Yiu C, Rueggeberg FA, Foulger S, Saito T, Nishitani Y, Yoshiyama M, Tay FR, Pashley DH. Effects of resin hydrophilicity on water sorption and changes in modulus of elasticity. Biomaterials. 2005; 26:6449–6459. PMID: 15949841.

12. Giannini M, Di Francescantonio M, Pacheco RR, Cidreira Boaro LC, Braga RR. Characterization of water sorption, solubility, and roughness of silorane- and methacrylate-based composite resins. Oper Dent. 2014; 39:264–272. PMID: 23875819.

13. Kaleem M, Satterthwaite JD, Watts DC. Effect of filler size and morphology on viscoelastic stability of resin-composites under dynamic loading. J Mater Sci Mater Med. 2012; 23:623–627. PMID: 22293893.

14. Zhang Y, Xu J. Effect of immersion in various media on the sorption, solubility, elution of unreacted monomers, and flexural properties of two model dental composite compositions. J Mater Sci Mater Med. 2008; 19:2477–2483. PMID: 18253815.

15. Schmidt C, Ilie N. The effect of aging on the mechanical properties of nanohybrid composites based on new monomer formulations. Clin Oral Investig. 2013; 17:251–257.

16. Asmussen E, Peutzfeldt A. Influence of selected components on crosslink density in polymer structures. Eur J Oral Sci. 2001; 109:282–285. PMID: 11531075.

17. El-Safty S, Silikas N, Watts DC. Creep deformation of restorative resin-composites intended for bulk-fill placement. Dent Mater. 2012; 28:928–935. PMID: 22656273.

18. Arrais CA, Oliveira MT, Mettenburg D, Rueggeberg FA, Giannini M. Silorane- and high filled-based “low-shrinkage” resin composites: shrinkage, flexural strength and modulus. Braz Oral Res. 2013; 27:97–102. PMID: 23459774.

19. Leprince JG, Palin WM, Hadis MA, Devaux J, Leloup G. Progress in dimethacrylate-based dental composite technology and curing efficiency. Dent Mater. 2013; 29:139–156. PMID: 23199807.

20. Garoushi S, Säilynoja E, Vallittu PK, Lassila L. Physical properties and depth of cure of a new short fiber reinforced composite. Dent Mater. 2013; 29:835–841. PMID: 23726127.

21. Goracci C, Cadenaro M, Fontanive L, Giangrosso G, Juloski J, Vichi A, Ferrari M. Polymerization efficiency and flexural strength of low-stress restorative composites. Dent Mater. 2014; 30:688–694. PMID: 24703547.

22. Chang M, Dennison J, Yaman P. Physical property evaluation of four composite materials. Oper Dent. 2013; 38:E144–E153. PMID: 23550912.