Document Type: Original Article

Authors

1 Postgraduate Student, Dept. of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran.

2 Dept. of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran.

3 Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

4 Dental Student, Faculty of Dentistry, Shahed University, Tehran, Iran.

Abstract

Statement of the Problem:  The efficacy of erbium-doped yttrium aluminum garnet (Er: YAG) laser on the debonding properties of certain post materials has remained largely unexplored.
Purpose: This study aimed to investigate the effect of Er: YAG laser irradiation on debonding of cemented glass fiber posts in root canal treated teeth.
Material and Method: Forty root canaled mandibular premolar teeth were used in this study. Glass fiber posts were bonded using Panavia F 2.0 cement in the root canal space, and samples were divided into two groups. In the test group, samples were exposed to laser radiation of 7 W, 350 mJ, frequency of 20 Hz and discontinued washing spray. In the control group, samples were left untouched. In each group, samples were sectioned into 1.5 mm thick slices from the coronal, middle and apical thirds of the root (N=120). Tensile bond strengths were evaluated using the push-out test and failure patterns were evaluated using scanning electron microscopy (SEM). To compare the laser and non-laser groups at each location, independent sample t test was applied, and to compare bond strength between the locations in each group, one-way ANOVA and Tukey’s HSD post hoc was applied.
Results: A significant difference in tensile strength was observed between the laser-irradiated group and control group; tensile bond strength was much higher in the control group (p <0.001). The highest frequency of fractures was observed at the cement-dentin interface. Given the used parameters, complete debonding was not achieved in the laser-irradiated group.
Conclusion: Laser radiation reduced the bond strength of glass fiber posts to resin cement without complete debonding.

Keywords

[1]  Cheung W. A review of the management of endodontically treated teeth: Post, core and the final restoration. J Am Dent Assoc. 2005; 136: 611-619.

[2]  ParčinaAmižić I, Baraba A. Esthetic intracanal posts. Acta Stomatolcroat. 2016; 50: 143-150.

[3]  Maccari PC, Conceicao EN, Nunes MF. Fracture resistance of endodontically treated teeth restored with three different prefabricated esthetic posts. J Esthet Restor Dent. 2003; 15: 25-31.

[4]  Goracci C, Ferrari M. Current perspectives on post sy-stems: a literature review. Aust Dent J. 2011; 56: 77-83.

[5]  Morgano SM, Rodrigues AH, Sabrosa CE. Restoration of endodontically treated teeth. Dent Clin North Am. 2004; 48: 397-416.

[6]  Abbott P. Incidence of root fractures and methods used for post removal. Int Endontic J. 2002; 35: 63-67.

[7]  Castrisos T, Abbott P. A survey of methods used for post removal in specialist endodontic practice. Int Endontic J. 2002; 35: 172-180.

[8]  Pithon MM, Figueiredo DSF, Oliveira DD, da*Silva*Coqueiro R. What is the best method for debonding metallic brackets from the patient’s perspective? Prog Orthod. 2015; 16: 17.

[9]  Walsh L. The current status of laser applications in dentistry. Aust Dent J. 2003; 48: 146-155.

[10]          Stabholz A, Zeltser R, Sela M, Peretz B, Moshonov J, Ziskind D. The use of lasers in dentistry: principles of operation and clinical applications. Compend Contin Educ Dent. 2003; 24: 935-948.

[11]          Bader C, Krejci I. Indications and limitations of Er: YAG laser applications in dentistry. Am J Dent. 2006; 19: 178-186.

[12]          Oztoprak MO, Nalbantgil D, Erdem AS, Tozlu M, Arun T. Debonding of ceramic brackets by a new scanning laser method. Am J Orthod Dentofacial Orthop. 2010; 138: 195-200.

[13]          Mundethu AR, Gutknecht N, Franzen R. Rapid debonding of polycrystalline ceramic orthodontic brackets with an Er: YAG laser: an in vitro study. Lasers Med Sci. 2014; 29: 1551-1556.

[14]          Morford CK, Buu NC, Rechmann BM, Finzen FC, Sharma AB, Rechmann P. Er: YAG laser debonding of porcelain veneers. LSM. 2011; 43: 965-974.

[15]          Pereira JR, do*Valle AL, Ghizoni JS, Lorenzoni FC, Ramos MB, dos*Reis*Só MV. Push-out bond strengths of different dental cements used to cement glass fiber posts. J Prosthet Dent. 2013; 110: 134-140.

[16]          Hoteit M, Nammour S, Zeinoun T. Evaluation of Enamel Topography after Debonding Orthodontic Ceramic Brackets by Different Er,Cr:YSGG and Er:YAG Lasers Settings. Dent J. 2020; 8: 1-15.

[17]          Pelozo L, Silva-Neto R, Corona S, Palma-Dibb R, Souza-Gabriel A. Dentin pretreatment with Er:YAG laser and sodium ascorbate to improve the bond strength of glass fiber post. Lasers Med Sci. 2019; 34: 47-54.

[18]          Gomes KGF, Faria NS, Neto WR, Colucci V, Gomes EA. Influence of laser irradiation on the push-out bond strength between a glass fiber post and root dentin. J Prosthet Dent. 2018; 119: 97-102.

[19]          Deeb JG, Grzech-Leśniak K, Weaver C, Matys J, Bencharit S. Retrieval of glass fiber post using Er:YAG laser and conventional endodontic ultrasonic method: An in vitro study. J Prosthodont. 2019; 28: 1024-1028.

[20]          Apel C, Franzen R, Meister J, Sarrafzadegan H, Thelen S, Gutknecht N. Influence of the pulse duration of an Er: YAG laser system on the ablation threshold of dental enamel. J Lasers Med Sci. 2002; 17: 253-257.

[21]          Tak O, Sari T, ArslanMalkoç M, Altintas S, Usumez A, Gutknecht N. The effect of transmitted Er: YAG laser energy through a dental ceramic on different types of resin cements. LSM. 2015; 47: 602-607.

[22]          Yearn J. Factors affecting cure of visible light activated composites. Int Dent J. 1985; 35: 218-225.

[23]          Ghavam M, Kermanshah H, Ataei M, Shadman N.  Polymerization of dual cure resin cements applied for luting tooth colored fiber posts. Journal of Dental Medicine. 2007; 20: 19-26.

[24]          Onay E, Korkmaz Y, Kiremitci A. Effect of adhesive system type and root region on the push‐out bond strength of glass–fibre posts to radicular dentine. Int Endodontic J. 2010; 43: 259-268.

[25]          Alexander R, Xie J, Fried D. Selective removal of residual composite from dental enamel surfaces using the third harmonic of a Q‐switched Nd: YAG laser. LSM. 2002;30: 240-245.

[26]          Takashina M, Ebihara A, Sunakawa M, Anjo T, Takeda A, Suda H. The possibility of dowel removal by pulsed Nd: YAG laser irradiation. LSM. 2002; 31: 268-274.

[27]          Angeloni V, Mazzoni A, Marchesi G, Cadenaro M, Comba A, Maravić T, et al. Role of Chlorhexidine on Long-term Bond Strength of Self-adhesive Composite Cements to Intraradicular Dentin. J Adhes Dent. 2017;19:341-348.

[28]          Durski M, Metz M, Crim G, Hass S, Mazur R, Vieira S. Effect of Chlorhexidine Treatment Prior to Fiber Post Cementation on Long-Term Resin Cement Bond Strength. Oper Dent. 2018; 43: E72-E80.

[29]          Oliviera LV, Maia TS, Zancope K, Menezes MDS, Soares CJ, Moura CCG. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review. Braz Oral Res. 2018; 32: 1-11.

[30]          Khalighinejad N, Feiz A, Faghihian R, Swift JE. Effect of dentin conditioning on bond strength of fiber posts and dentin morphology: a review. Am J Dent. 2014; 27: 3-6.

[31]          Almulhim KS, Oliveira-Haas L, Farhangpour A. Effect of resin cement, aging process, and root level on the bond strength of fiber-posts: An in vitro study. Am J Dent. 2016; 29: 255-260.

[32]          Ruiz L, Gomes GM, Bittencourt B, da*Silva FR, Gomes OMM, ChidoskiFilho JC, et al. Effect of Root Canal Sealers on Bond Strength of Fiber Posts to Root Dentin Cemented after one Week or six Months. IEJ. 2018; 13: 54-60.

[33]          Marchesi G, Mazzoni A, Turco G, Cadenaro M, Ferrari M, Di*Lenarda R, et al. Aging affects the adhesive interface of posts luted with self-adhesive cements: a 1-year study. J Adhes Dent. 2013; 15: 173-180.

[34]          Kececi AD, Kaya BU, Adanir N. Micro push-out bond strengths of four fiber-reinforced composite post systems and 2 luting materials. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008; 105: 121-128.