:: Volume 25, Issue 4 (10-2013) ::
J Iran Dent Assoc 2013, 25(4): 278-283 Back to browse issues page
Micro-shear Bond Strength of a Nanofiller Bonding agent with and without Thermocycling in a Newly Invented Device
Zahra Jaberi Ansari1, Hamid Khalili2, Mohammad ali Keshavarz3, Manoosha Amiri Siavashani *4
1- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2- Assistant Professor, Department of Computer Engineeri, School of Engineeri, Shahid Beheshti University. Tehran, Iran
3- Dentist
4- Resident, Department of Restorative Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran , Manusha_amr@yahoo.com
Abstract:   (6729 Views)

  Background and Aim : Estimation of the survival of dental materials is especially important when manufacturing new materials. Thermocycling can greatly help in this respect. The purpose of this study was to evaluate micro-shear bond strength of a nanofiller bonding with and without thermocycling in a newly invented device .

  Materials and Methods : In this experimental study, human third molars were sectioned into 1.5 mm slices after extraction and disinfection. Clearfil Tri-S nanofiller bond was applied to the dentin part of sections according to the manufacturer’s instructions. Clearfil AP-X composite resin was placed over the dentin using tubes with 0.75 mm internal diameter and one mm height and light cured. Specimens were randomly divided into three groups and subjected to thermocycling in a newly invented device for zero, 3000 and 5000 cyclesbetween 5±2°C and 55±2°C. Micro-shear bond strength was measured by microtensile tester with a cross-head speed of 0.5 mm/min. Obtained data were analyzed using one-way ANOVA. Tukey’s test was used for multiple comparisons with a 95% confidence interval .

  Results : The mean micro-shear bond strength after zero, 3000 and 5000 thermal cycles was found to be 19.27±4.56, 17.00±6.52 and 11.58±4.64 MPa, respectively. The reduction in bond strength between zero and 3000 thermal cycles was not statistically significant (P=0.3) but this reduction between zero and 5000, as well as 3000 and 5000 cycles was statistically significant (P<0.002 and P<0.03, respectively).

  Conclusion: Increase in number of thermal cycles for more than 3000 reduces the micro-shear bond strength of Tri-S bonding agent .

Keywords: Micro-shear bond strength, bonding, thermal cycles, nanofiller
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Type of Study: Orginal | Subject: Restorative Dentistry
1. Prabhakar AR, Madan M, Raju OS. The margin-al seal of a flowable composite, an injectable resin modified glass ionomer and a compomer in primary molars- An in vitro study. J Indian Soc Pedod Preve Dent. 2003 Jun; 21(2):45-8.
2. Huang MS, Ding SJ: The effect of thermocy-cling and dentin pretreatment on the durability of the bond between composite resin and den-tin. J Oral Rehabil. 2004 May; 31(5):492-9.
3. Amaral FL, Colucci V, Palma‐Dibb RG, Corona SA. Assessment of in vitro methods used to promote adhesive interface degradation: A criti-cal review. J Esthetic Rest Dent. 2007 Nov, 19(6):340-353.
4. Lee H, lim BS, Rhee SH, Yang Hc, Powers JM.Changes of optical properties of dental nano- filled resin composites after curing and thermocycling. J Biomed Mater Res. B Apple Biomatater. 2004 Oct; 71(l):16-21.
5. Poptani B, Gohil KS, Shukla M. Microtensile dentin bond strength of fifth with five seven-generation Dentin bonding agents after thermo-cycling: An in vitro study. Contemp Clin Dent. 2012 Sept, 3(Suppl2):S167-S171.
6. Mousavinasab SM, Farhadi A, Shabanian M. Effect of storage time, thermocycling and resin coating on durability of dentin bonding systems. Dent Res J. 2009 Spring; 6(1):29-37.
7. Nagayassu MP, Shintome LK, Arana-Chavez V E, Fava M. Micro-shear bond strength of differ-ent adhesives to human dental enamel. J Clini Ped Dent. 2011 Spring, 35(3):301-304.
8. Jaberi Ansari Z, Sadr A, Moezizade M, Aminian R, Ghasemi A, Tagami J, Shimada Y, Jaberi Ansari Sh, Moayedi S. Effect of one-year stor-age in water on bond strength of self etching adhesives to enamel and dentin. Dent Mat J. 2008 Mar; 27 (2):266-72.
9. Gale MS, Darwell BW. Thermal cycling proce-dures for laboratory testing of dental restora-tions. J Dent. 1999 Feb; 27(2):89-99.
10. Lelou PG, Dhoore W, Bouter D, Derange M, Hardo N Yamaguchi S. Metaanalytical review of factors involved in dentin adherence. J Dent Res. 2002 Ju1; 80(7):1605-14.
11. Frankenberger R, Pashley DH, Reich SM, Lohbauer U, Pechelt A, Tay F. Characterization of resin-dentin interfaces by compressive cyclic loading. Bio Mat. 2005 May; 26(14):2043-52.
12. Frankenberger R, Strobel WO, Karmer N, Lohbauer U, Winterscheidt B, Winterscheidt J, Pechelt A. Evaluation of the fatigue behavior of the resin-dentin bond with the use of different methods: J Biomed Mater Res. 2003 Nov; 67(2): 712-21.
13. LinoCarracho A. The effect of storage and themocycling on the shear bond strength of three dental adhesives. Quintessence 1991 Sept; 2(9): 745-52.
14. Masahi M. Influence of thermocycling on den-tin bond strength of two step bonding systems. AM J Dent. 1998 Jun; 11:118-122.
15. Wang H, Shirnada Y, Tagami J. Shear bond sta-bility of current adhesive system to enamel. Oper Dent. 2004 Mar-Apr; 29(2):168-71.
16. Shimada Y, Senawongse P. Effective bond strength of current adhesive systems on decidu-ous and permanent dentin. Oper Dent. 2004 Mar-Apr; 29(2):196-202.
17. Kasraei Sh, Khamverdi Z. Effect of Mechanical load cycling on Microtensile bond strength of Self-Etch Systems to Dentin. Journal of Dentis-try of Tehran University of Medical Sciences 2008 Autumn; 5(4):173-178.
18. Sadr A, ShimadaY, Tagami J. Bond strengths of two adhesive and effects of application meth-ods. J Dent Res. 2005 Mar; 84(10):150-6.
19. Shirnada Y, Yamaguchi S, Tagami J. Micro-shear bond strength of dual-cured resin cement to glass ceramics. Dent Mater. 2002 Jul;18(5):380-8.
20. Roberson TM, Heyman H, Swift EJ. Art and science of operative dentistry. 4th ed. St. Louis: The C. V Mosby Co; 2002, 237-61.
21. Takaya I, Naako O, Ak.ko O, Hiroyasu K.Bond Strength to bovine dentin of a compo-site core build-up material combined with four different bonding agents. J Oral Sci. 2008;50(3):329-333.
22. Burger KM, Cooley RL, Garcia‐Godoy F. Effect of thermocycling times on dentin bond strength bond. J Esthet Rest Dent. 2007 July 1; 4(6):197-198.

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