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Cavity Preparation by Laser in Primary Teeth: Effect of 2 Levels of Energy Output on the Shear Bond Strength of Composite Restoration to Dentin

Mehrsa Paryab, Shahrzad Sharifi, Hossein Afshar, Nazanin Kiomarsi, Mohammad javad Kharazifard




Introduction: One of the main applications of laser in dentistry is the removal of dental caries and preparation of restorative cavities. The morphology and wettability of laser prepared surfaces are different from that of those prepared with conventional method which may affect the quality of the adhesive potential of bonding agents in these surfaces. This study aimed to assess the shear bond strength of a total-etch and self-etch adhesive system to primary tooth dentin prepared by two different energy densities of Er:YAG laser in comparison with surfaces prepared by bur.

Methods: A total of 60 human primary second molars extracted for orthodontic purposes were selected and randomly divided into 3 main groups of equal (n = 20). Group A: Preparation of dentin surface by bur; group B: Preparation of dentin surface by laser with 300 mJ energy level; group C: Preparation of dentin surface by laser with 400 mJ energy level. In each of the main groups, the teeth were randomly assigned to 2 subgroups. Composite resin material was bonded with the total-etch adhesive system in subgroups A1, B1, and C1 and with the self-etch adhesive system in subgroups A2, B2, and C2. The samples were thermo-cycled, and composite restorations shear bond strength was measured in MPa. Data were analyzed using two-way analysis of variance (ANOVA), and P values less than 0.05 were considered statistically significant.

Results: The highest and the lowest shear bond strength values were observed in group A2 (Preparation by bur- Composite resin material bonded by Clearfil SE Bond) and group C2 (Preparation by laser with 400 mJ energy level - Composite resin material bonded by Clearfil SE Bond), respectively. The results showed no statistically significant differences between the study subgroups (P > 0.05).

Conclusion: It is concluded that in terms of shear bond strength to dentin, Single Bond and Clearfil SE Bond adhesive agents adequately perform in primary tooth dentin prepared by Er: YAG laser with energy levels of 300 and 400 mJ and frequency of 10 Hz.


Bonding agent; dentin; Er: YAG laser; Energy output; Primary teeth; Shear bond strength


Sulewski JG. Historical survey of laser dentistry. Dent Clin North Am. 2000;44(4):717-752.

Olivi G, Genovese MD, Caprioglio C. Evidence-based dentistry on laser paediatric dentistry: review and outlook. Eur J Paediatr Dent. 2009;10(1):29-40.

Yildiz E, Sirinkaraarslan E, Yegin Z, Cebe MA, Tosun G. Effect of caries removal techniques on the bond strength of adhesives to caries-affected primary dentin in vitro. Eur J Paediatr Dent. 2013;14(3):209-214.

Chaiyavej S, Yamamoto H, Takeda A, Suda H. Response of feline intradental nerve fibers to tooth cutting by Er:YAG laser. Lasers Surg Med. 2000;27(4):341-349.

Pelagalli J, Gimbel CB, Hansen RT, Swett A, Winn DW, 2nd. Investigational study of the use of Er:YAG laser versus dental drill for caries removal and cavity preparation-phase I. J Clin Laser Med Surg. 1997;15(3):109-115. doi:10.1089/clm.1997.15.109

Keller U, Hibst R. Experimental studies of the application of the Er:YAG laser on dental hard substances: II. Light microscopic and SEM investigations. Lasers Surg Med. 1989;9(4):345-351.

Freitas PM, Navarro RS, Barros JA, de Paula Eduardo C. The use of Er:YAG laser for cavity preparation: an SEM evaluation. Microsc Res Tech. 2007;70(9):803-808. doi:10.1002/jemt.20470

Kornblit R, Bossu M, Mari D, Rocca JP, Polimeni A. Enamel and dentine of deciduous teeth Er:YAG laser prepared. A

SEM study. Eur J Paediatr Dent. 2009;10(2):75-82.

de Oliveira Ortolan AS, Torres CP, Gomes-Silva JM, et al. Effect of erbium-doped yttrium aluminium garnet laser parameters on ablation capacity and morphology of primary dentin. Photomed Laser Surg. 2009;27(6):885-890. doi:10.1089/pho.2008.2358

Al-Batayneh OB, Seow WK, Walsh LJ. Assessment of Er:YAG laser for cavity preparation in primary and permanent teeth: a scanning electron microscopy and thermographic study. Pediatr Dent. 2014;36(3):90-94.

Schein MT, Bocangel JS, Nogueira GE, Schein PA. SEM evaluation of the interaction pattern between dentin and

resin after cavity preparation using ER:YAG laser. J Dent. 2003;31(2):127-135.

Barceleiro Mde O, de Mello JB, de Mello GS, Dias KR, de Miranda MS, Sampaio Filho HR. Hybrid layer thickness and morphology: the influence of cavity preparation with Er:YAG laser. Oper Dent. 2005;30(3):304-310.

Camerlingo C, Lepore M, Gaeta GM, et al. Er:YA Glaser treatments on dentine surface: micro-Raman spectroscopy and SEM analysis. J Dent. 2004;32(5):399-405. doi:10.1016/j.jdent.2004.01.011

Koliniotou-Koumpia E, Kouros P, Zafiriadis L, Koumpia E, Dionysopoulos P, Karagiannis V. Bonding of adhesives to Er:YAG laser-treated dentin. Eur J Dent. 2012;6(1):16-23.

Ramos RP, Chinelatti MA, Chimello DT, Borsatto MC, Pecora JD, Palma-Dibb RG. Bonding of self-etching and total-etch systems to Er:YAG laser-irradiated dentin. Tensile bond strength and scanning electron microscopy. Braz Dent J. 2004;15 Spec No:Si9-20.

Ramos RP, Chimello DT, Chinelatti MA, Nonaka T, Pecora JD, Palma Dibb RG. Effect of Er:YAG laser on bond strength to dentin of a self-etching primer and two singlebottle adhesive systems. Lasers Surg Med. 2002;31(3):164-170. doi:10.1002/lsm.10106

De Munck J, Van Meerbeek B, Yudhira R, Lambrechts P, Vanherle G. Micro-tensile bond strength of two adhesives to Erbium:YAG-lased vs. bur-cut enamel and dentin. Eur J Oral Sci. 2002;110(4):322-329.

Bahrololoomi Z, Kabudan M, Gholami L. Effect of Er:YAG Laser on Shear Bond Strength of Composite to Enamel and Dentin of Primary Teeth. J Dent (Tehran). 2015;12(3):163-170.

Torres CP, Gomes-Silva JM, Borsatto MC, Barroso JM, Pecora JD, Palma-Dibb RG. Shear bond strength of self-etching and total-etch adhesive systems to Er:YAG laser-irradiated primary dentin. J Dent Child (Chic). 2009;76(1):67-73.

Monghini EM, Wanderley RL, Pecora JD, Palma Dibb RG, Corona SA, Borsatto MC. Bond strength to dentin of primary teeth irradiated with varying Er:YAG laser energies and SEM examination of the surface morphology. Lasers Surg Med. 2004;34(3):254 259. doi:10.1002/lsm.20023

Bahrololoomi Z, Heydari E. Assessment of Tooth Preparation via Er:YAG Laser and Bur on Microleakage of Dentin Adhesives. J Dent (Tehran). 2014;11(2):172-178.

Celik EU, Ergucu Z, Turkun LS, Turkun M. Shear bond strength of different adhesives to Er:YAG laser-prepared

dentin. J Adhes Dent. 2006;8(5):319-325.

da Silva MP, Barceleiro MO, Dias KR, Zanin F. Shear bond strength of two adhesive systems bonded to Er:YAG laserprepared dentin. Gen Dent. 2011;59(3):e96-100.

Flury S, Koch T, Peutzfeldt A, Lussi A. Micromorphology and adhesive performance of Er:YAG laser-treated dentin of primary teeth. Lasers Med Sci. 2012;27(3):529-535. doi:10.1007/s10103-011-0882-5

Baghalian A, Nakhjavani YB, Hooshmand T, Motahhary P, Bahramian H. Microleakage of Er:YAG laser and dental bur prepared cavities in primary teeth restored with different adhesive restorative materials. Lasers Med Sci. 2013;28(6):1453-1460. doi:10.1007/s10103-012-1222-0

Roebuck EM, Saunders WP, Whitters CJ. Influence of Erbium:YAG laser energies on the microleakage of Class V resin-based composite restorations. Am J Dent. 2000;13(5):280-284.

Roebuck EM, Whitters CJ, Saunders WP. The influence of three Erbium:YAG laser energies on the in vitro microleakage of Class V compomer resin restorations. Int J Paediatr Dent. 2001;11(1):49-56.

Siadat H, Mirfazaelian A. Microleakage and its measurement methods. J Dent Med(TUMS). 2002;15(2):70-81.

Zhang S, Chen T, Ge LH. Scanning electron microscopy study of cavity preparation in deciduous teeth using the Er:YAG laser with different powers. Lasers Med Sci. 2012;27(1):141-144. doi:10.1007/s10103-010-0854-1

Guler C, Malkoc MA, Gorgen VA, Dilber E, Bulbul M. Effects of Er:YAG laser on mineral content of sound dentin

in primary teeth. ScientificWorldJournal. 2014;2014:578342. doi:10.1155/2014/578342

Castilho MS, de Souza-Gabriel AE, Marchesan MA, Floriam LJ, Sousa-Neto MD, Correa Silva-Sousa YT. Temperature changes in the deciduous pulp chamber during cavity preparation with the Er:YAG laser. J Dent Child (Chic). 2007;74(1):21-25.

Brandao CB, Contente MM, De Lima FA, et al. Thermal alteration and morphological changes of sound and demineralized primary dentin after Er:YAG laser ablation. Microsc Res Tech. 2012;75(2):126-132. doi:10.1002/ jemt.21034

Marquezan M, da Silveira BL, Burnett LH, Jr., Rodrigues CR, Kramer PF. Microtensile bond strength of contemporary adhesives to primary enamel and dentin. J Clin Pediatr Dent. 2008;32(2):127-132.

Thanaratikul B, Santiwong B, Harnirattisai C. Self-etch or etch-and-rinse mode did not affect the microshear bond strength of a universal adhesive to primary dentin. Dent Mater J. 2016;35(2):174-179. doi:10.4012/dmj.2015-109

Agostini FG, Kaaden C, Powers JM. Bond strength of selfetching primers to enamel and dentin of primary teeth. Pediatr Dent. 2001;23(6):481-486.

Shirani F, Birang R, Malekipour MR, Hourmehr Z, Kazemi S. Shear bond strength of resin composite bonded with two adhesives: Influence of Er: YAG laser irradiation distance. Dent Res J (Isfahan). 2014;11(6):689-694.

Mortazavi V, Fathi M, Ataei E, Khodaeian N, Askari N. Shear bond strengths and morphological evaluation of filled and unfilled adhesive interfaces to enamel and dentine. Int J Dent. 2012;2012:858459. doi:10.1155/2012/858459

Sumikawa DA, Marshall GW, Gee L, Marshall SJ. Microstructure of primary tooth dentin. Pediatr Dent.1999;21(7):439-444.

Nor JE, Feigal RJ, Dennison JB, Edwards CA. Dentin bonding: SEM comparison of the dentin surface in primary and permanent teeth. Pediatr Dent. 1997;19(4):246-252.

DOI: https://doi.org/10.22037/jlms.v10i3.13102