Push-out bond strength of calcium-silicate cements following Er:YAG and diode laser irradiation of root dentin
This study aimed to compare the effects of diode and Er:YAG laser irradiation of root dentin on push-out bond strength of mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cements. An in vitro experimental study was conducted on 90 dentin discs, cut out of freshly extracted human teeth. The discs were instrumented to obtain 1.3-mm lumen diameter. Then, they were randomly divided into six groups (n = 15). Groups 1 and 4 subjected to diode laser (Wiser, Doctor Smile, Italy) (980 nm, 1 W, continuous mode) for 10 s and filled with MTA and CEM cements. Groups 2 and 5 subjected to Er:YAG laser (Deka, Italy) (2940 nm, 1 W, 10 Hz, 230 μs) for 10 s and filled with MTA and CEM cements. Groups 3 and 6 (control groups) were filled with MTA and CEM cements without laser irradiation. After 7 days, push-out bond strength test was performed using a universal testing machine in order to evaluate the adhesion of the biomaterials to dentin. The samples were evaluated under a light microscope at × 40 magnification to determine the mode of fracture. Data were analyzed using two-way ANOVA. The highest push-out bond strength (8.76 ± 3.62 MPa) was noted in group 1 (diode/MTA), which was significantly higher than the other groups (P < 0.001). The lowest bond strength (2.61 ± 0.81) was noted in group 6 (control/CEM). Diode laser significantly increased the bond strength of both cements (P < 0.05), but Er:YAG laser irradiation only increased the bond strength of CEM and had no significant effect on MTA (P = 0.603). The bond strength of MTA control group was higher than that of CEM control group (P = 0.001). Push-out bond strength of endodontic cements can be affected by dentin conditioning with diode 980 nm and Er:YAG laser. Nine hundred eighty-nanometer diode laser irradiation is recommended to increase the bond strength of endodontic cements particularly the CEM cement to dentin.
KeywordsMineral trioxide aggregate Calcium-enriched mixture cement Diode laser Er:YAG laser Push-out bond strength
The authors would like to thank Tehran University of Medical Sciences, International Campus for the support.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
The study is an ex vivo study and does not include animal or human participants.
- 2.Ferris DM, Baumgartner JC (2004) Perforation repair comparing two types of mineral trioxide aggregate. J Endod 30(6):422–424Google Scholar
- 3.Hardy I, Liewehr FR, Joyce AP, Agee K, Pashley DH (2004) Sealing ability of one-up bond and MTA with and without a secondary seal as furcation perforation repair materials. J Endod 30(9):658–661Google Scholar
- 9.Shokouhinejad N, Hoseini A, Gorjestani H, Shamshiri AR (2013) The effect of different irrigation protocols for smear layer removal on bond strength of a new bioceramic sealer. Iran Endod J 8(1):10–13Google Scholar
- 11.Winik R, Araki AT, Negrao JA, Bello-Silva MS, Lage-Marques JL (2006) Sealer penetration and marginal permeability after apicoectomy varying retrocavity preparation and retrofilling material. Braz Dent J 17(4):323–327Google Scholar
- 12.Korkut E, Torlak E, Gezgin O, Ozer H, Sener Y (2018) Antibacterial and smear layer removal efficacy of Er:YAG laser irradiation by photon-induced photoacoustic streaming in primary molar root canals: a preliminary study. Photomed Laser Surg 36(9):480–486. https://doi.org/10.1089/pho.2017.4369 Google Scholar
- 14.Borzabadi-Farahani A (2017) The adjunctive soft-tissue diode laser in orthodontics. Compend Contin Educ Dent 38(eBook 5):e18–e31Google Scholar
- 15.Etemadi A, Shahabi S, Chiniforush N, Pordel E, Azarbayejani Z, Heidari S (2015) Scanning electron microscope (SEM) evaluation of composite surface irradiated by different powers of Er:YAG laser. J Lasers Med Sci 6(2):80–84Google Scholar
- 16.Gholami GA, Fekrazad R, Esmaiel-Nejad A, Kalhori KA (2011) An evaluation of the occluding effects of Er; Cr: YSGG, Nd: YAG, CO2 and diode lasers on dentinal tubules: a scanning electron microscope in vitro study. Photomed Laser Surg 29(2):115–121Google Scholar
- 19.Pecora JD, Cussioli AL, Guerisoli DM, Marchesan MA, Sousa-Neto MD, Brugnera Junior A (2001) Evaluation of Er:YAG laser and EDTAC on dentin adhesion of six endodontic sealers. Braz Dent J 12(1):27–30Google Scholar
- 20.Saghiri MA, Asgar K, Gutmann JL, Garcia-Godoy F, Ahmadi K, Karamifar K, Asatorian A (2012) Effect of laser irradiation on root canal walls after final irrigation with 17% EDTA or BioPure MTAD: X-ray diffraction and SEM analysis. Quintessence Int 43(10):e127–e134Google Scholar
- 24.Goracci C, Tavares AU, Fabianelli A, Monticelli F, Raffaelli O, Cardoso PC, Tay F, Ferrari M (2004) The adhesion between fiber posts and root canal walls: comparison between microtensile and push-out bond strength measurements. Eur J Oral Sci 112(4):353–361. https://doi.org/10.1111/j.1600-0722.2004.00146.x Google Scholar
- 28.Lotfi M, Ghasemi N, Rahimi S, Bahari M, Vosoughhosseini S, Saghiri MA, Zand V (2014) Effect of smear layer on the push-out bond strength of two endodontic biomaterials to radicular dentin. Iran Endod J 9(1):41–44Google Scholar
- 30.Liu Y, Gao J, Gao Y, Xu S, Zhan X, Wu B (2013) In vitro study of dentin hypersensitivity treated by 980-nm diode laser. J Lasers Med Sci 4(3):111–119Google Scholar
- 31.Shokouhinejad N, Razmi H, Fekrazad R, Asgary S, Neshati A, Assadian H, Kheirieh S (2012) Push-out bond strength of two root-end filling materials in root-end cavities prepared by Er,Cr:YSGG laser or ultrasonic technique. Aust Endod J 38(3):113–117. https://doi.org/10.1111/j.1747-4477.2010.00264.x Google Scholar
- 34.Adl A, Sobhnamayan F, Kazemi O (2014) Comparison of push-out bond strength of mineral trioxide aggregate and calcium enriched mixture cement as root end filling materials. Dent Res J (Isfahan) 11(5):564–567Google Scholar
- 37.Sarkar NK, Caicedo R, Ritwik P, Moiseyeva R, Kawashima I (2005) Physicochemical basis of the biologic properties of mineral trioxide aggregate. J Endod 31(2):97–100Google Scholar
- 38.Sobhnamayan F, Adl A, Shojaee NS, Gavahian S (2015) The effect of chlorhexidine on the push-out bond strength of calcium-enriched mixture cement. Iran Endod J 10(1):59–63Google Scholar