Introduction: The aim of this study was to evaluate and compare microhybride composite treated by bur and different power of Erbium, Chromium doped Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser by Scanning Electron Microscope (SEM).
Methods: 21 microhybride composite blocks (DiaFil TM, DiaDent, Korea) with 2 × 4 × 4 mm dimensions were made. The bonding surface of these blocks were polished, The samples were put into 6 groups for laser irradiation as follows: Group 1 (power: 1W, Energy: 50 mJ); Group 2(power: 2 W, Energy: 100mJ); Group 3 (power: 3W, Energy: 150mJ); Group 4 (power: 4W, Energy: 200mJ); Group 5 (power: 5W, Energy: 250mJ) and Group 6(power:6 W, Energy :300mJ). One group prepared by bur- treated. All samples were prepared by repetition rate of 20 Hz. Then, the samples were prepared for SEM examination.
Result: Some irregularities were seen in Er,Cr:YSGG laser samples in comparison to Bur group that produced favorable surface for adhesion of repair composite.
Conclusion: Among different lasers, Er;Cr:YSGG laser can be chosen as a suitable technique for surface treatment of unsatisfactory composites.
Key words: SEM evalution; laser; composite resin
Mjor IA, Moorhead JE. Selection of restorative materials, reasons for replacement, and longevity of restorations in Florida. J Am Coll Dent.1998; 65(3) 27-33.
Murdoch-Kinch MA, McLean ME. Minimally invasive dentistry. J Am Dent Assoc. 2003; 134: 87–95.
Gordan VV, Mjor IA, Blum IR, Wilson N. Teaching students the repair of resin-based composite restorations: a survey of North American dental schools. J Am Dent Assoc. 2003; 134: 317-23.
Lewis G, Johnson W, Martin W, Carnerdy A, Claburn C, Collier M. Shear bond strength of immediately repaired light-cured composite resin restorations. Oper Dent. 1998; 23:121-7.
Oztas N, Alacam A, Bardaksy Y. the effect of air abrasion with two new bonding agents on composite repair. Oper Dent. 2003; 28:149-54.
Hibst R. Lasers for caries removal and cavity preparations: State of the art and future directions. J Oral Laser Applic. 2002; 2: 203–12.
Nokhbatolfoghahaie H, Chiniforush N, Shahabi S, Monzavi A. Scanning Electron Microscope (SEM) Evaluation of Tooth Surface Irradiated by Different Parameters of Erbium: Yttrium Aluminium Garnet(Er:Yag) Laser: J Lasers Med Sci 2012; 3(2):51-5
Türkmen C, Durkan M, Cimilli H, Öksüz M. Tensile bond strength of indirect composites luted with three new self-adhesive resin cements to dentin. J Appl Oral Sci. 2011;19(4):363-9.
HasaniTabatabaei M, Alizade Y, Taalim S. Effect of various surface treatment on repair strength of composite resin. J Dent Tehran Univ Med Sci. 2004; 1(4): 170-86.
Kimyai S, Mohammadi N, Navimipour EJ, Rikhtegaran S .Comparison of the effect of three mechanical surface treatments on the repair bond strength of a laboratory composite. Photomed Laser Surg 2010; 28(2):25–30.
Söderholm KJ, Roberts MJ .Variables influencing the repair strength of dental composites. Scand J Dent Res. 1991; 99:173–80.
Brosh T, Pilo R, Bichacho N, Blutstein R. Effect of combinations of surface treatments and bonding agents on the bond strength of repaired composites. J Prosthet Dent. 1997; 77:122–6.
Nilsoon E, Alaeddin S. Factors affecting the shear bond strength of bonded composite inlays. Int J Prosthodont. 2000; 13:52–8.
Bonstein T, Garlapo D, Donarummo J Jr, Bush PJ. Evaluation of varied repair protocols applied to aged composite resin. J Adhes Dent. 2005; 7(1):41–9.
Fawzy AS, El-Askary FS, Amer MA. Effect of surface treatments on the tensile bond strength of repaired water-aged anterior restorative micro-fine hybrid resin composite. J Dent. 2008; 36 (12):969–76.
Lizarelli RF, Moriyama LT, BagnatoVS. Ablation of composite resins using Er:YAG laser–comparison with enamel and dentin. Lasers Surg Med. 2003; 33(2):132–9.
Lucena-Martín C, González-López S, Navajas-Rodríguez de MondeloJM . The effect of various surface treatments and bonding agents on the repaired strength of heat-treated composites. J Prosthet Dent. 2001;86:481–8.
Swift EJ Jr, Cloe BC, Boyer DB .Effect of a silane coupling agent on composite repair strengths. Am J Dent. 1994;7:200–2.