Evaluation of bonding strength of composite resin restoration repairs
Keywords:
Operative dentistry, Dentin-bonding agents, Composites resinsAbstract
Composite resin repairs can prevent the replacement of worn restorations. This study evaluated the influence of different surface treatments and bonding agents on the bonding strength between an aged composite resin restoration and its repairs. Thirty composite resin cubes (A3) with 64mm3 were constructed, artificially aged (5000 cycles of thermocycling), and randomly assigned into three groups: G1 - phosphoric acid etching; G2 – roughing with a diamond bur and phosphoric acid etching; G3 - sandblasting with aluminum oxide and phosphoric acid etching. Each group was subdivided into 2 subgroups according to the adhesive system applied: Adper Scotchbond MP (BO) or Adper Single
Bond 2(SB). All experimental groups received a resin composite restoration in three increments (WE). Moreover, a control group was prepared in which these increments were inserted directly over the un-aged composite resin. All cubes were stored in distilled water at 37°C for 24 hours and were then sectioned longitudinally along the X and Y axes
to obtain sticks (0.64mm2) for micro tensile bond strength testing (mTBS). In addition, a sample of each group was prepared to evaluate surface alteration using a scanning electron microscope (SEM). The data of bond strength was analyzed by a two-way ANOVA followed by Tukey HSD and Dunnett post-hoc tests (α = 5%). The mean bond strength values and standard deviation in MPa were: G1(BO):60.1±9.2; G1(SB):48.8±21.7; G2(BO):64.4±13.5; G2(SB):64.5±9.0; G3(BO):76.9±14.5; G3(SB):72.6±13.9; and Control: 75.6±13.1. Regardless of the bonding agent, surface mechanical treatment is essential for the success of this procedure.
Downloads
References
Fawzy AS, El-Askary FS, Amer MA. Effect of surface treatments on the tensile bond strength of repaired water-aged anterior restorative microfine hybrid resin composite. J Dent. 2008;36:969- 76.
Gordan VV. Clinical evaluation of replacement of class V resin based composite restorations. J Dent. 2001;29:485-8.
Bonstein T, Garlapo D, Donarummo Jr J, Bush JP. Evaluation of varied repaired protocols applied to aged composite resin. J Adhes Dent. 2005;7:41- 9.
Kukrer D, Gemalmaz D, Kuybulu EO, Bozkurt FO. A prospective clinical study of ceromer inlays: results up to 53 months. Int J Prosthodont. 2004;17:17-23.
Bonstein T, Garlapo D, Donarummo Jr J, Bush PJ. Evaluation of varied repair protocols applied to aged composite resin. J Adhes Dent. 2005;7:41- 9.
Suzuki S, Ori T, Saimi Y. Effects of filler composition on flexibility of microfilled resin composite. J Biomed Mater Res B Appl Biomater. 2005;74:547-52.
Van Kerckhoven H, Lambrechts P. Unreacted methacrylate groups on the surfaces of composite resins. J Dent Res. 1982;61:791-5.
Sobreira FMS, Acevedo CR, Freitas Filho LHS, Vidal APV, Barros LF, Ferreira MP. Methods of repair in composed resin: a revision. Odontologia Clín-Científ. 2008;7:123-8.
DeHoff PH, Anusavice KJ,Wang Z. Threedimensional finite element analysis of the shear bond test. Dent Mater. 1995;11:126–31.
Versluis A, Tantbirojn D, Douglas WH. Why do shear bond tests pull out dentin? J Dent Res. 1997;76:1298–307.
Van Noort R, Cardew GE, Howard IC, Noroozi S. The effect of local interfacial geometry on the measurement of the tensile bond strength to dentin. J Dent Res. 1991;70:889–93.
Van Noort R, Noroozi S, Howard IC, Cardew G. A critique of bond strength measurements. J Dent. 1989;17:61–7.
Placido E, Meira JB, Lima RG, Muench A, Souza RM, Ballester RY. Shear versus micro-shear bond strength test: a finite element stress analysis. Dent Mater. 2007;23:1086–92.
Sano H, Shono T, Sonoda H, Takatsu T, Ciucchi B, Carvalho R, et al. Relationship between surface area for adhesion andtensile bond strength: evaluation of amicro-tensile bond test. Dent Mater. 1994;10:236–40.
Ferrari M, Goracci C, Sadek F, Eduardo P, Cardoso C. Microtensile bond strength tests: scanning electron microscopy evaluation of sample integrity before testing. Eur J Oral Sci. 2002;110:385–91.
Pashley DH, Sano H, Ciucchi B, Yoshiyama M, Carvalho RM. Adhesion testing of dentin bonding agents: a review. Dent Mater. 1995;11:117–25.
Costa TR, Ferreira SQ, Klein-Júnior CA, Loguercio AD, Reis A. Durability of surface treatments and intermediate agents used for repair of a polished composite. Oper Dent. 2010;35:231–7.
Rodrigues Jr SA, Ferracane JL, Della Bona A. Influence of surface treatments on the bond strength of repaired resin composite restorative materials. Dent Mater. 2009;25:442–51.
Franco EB, Pazim MSL, Francischone CE. Avaliação in vitro da resistência de união de diferentes combinações entre adesivos e resinas compostas. Braz Oral Res. 2000;14: 225-31.
Turner CW, Meiers JC. Repair of an aged, contaminated indirect composite resin with a direct, visible-light-cured composite resin. Oper Dent. 1993;18:187-94.
