Análise comparativa de redução microbial usando terapia fotodinâmica em dentes bovinos infectados com Enterococcus faecalis – um estudo in vitro

Autores

  • Janaina Guzzo Zechin School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.
  • Liviu Steier Warwick Dentistry, Warwick Medical School, Warwick, United Kingdom
  • Giampiero Rossi-Fedele School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.
  • Grasiela Longhi Gründling School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.
  • Daniela Sá School of Biosciences, Pontifical Catholic University of Rio Grande do Sul.
  • Amanda Guwzinski School of Biosciences, Pontifical Catholic University of Rio Grande do Sul.
  • Alessandra Cesar Trindade School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.
  • Matheus Albino Souza School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.
  • Silvia Dias de Oliveira c School of Biosciences, Pontifical Catholic University of Rio Grande do Sul.
  • Jose Antonio Poli de Figueiredo a School of Dentistry, Pontifical Catholic University of Rio Grande do Sul.

DOI:

https://doi.org/10.15448/1980-6523.2016.2.15365

Palavras-chave:

Biofilme, Dentes bovinos, Enterococcus faecalis, Terapia fotodinâmica

Resumo

Objetivo: Avaliar, in vitro, o uso da fibra óptica e diferentes tempos de pré-irradiação (PIT) na terapia fotodinâmica para a descontaminação do canal radicular de dentes bovinos infectados com Enterococcus faecalis.
Metodologia: Os dentes foram incubados por 60 dias e divididos em 6 grupos de acordo com o protocolo de descontaminação: Grupo 1 – água destilada; Grupo 2 – 1 minuto de pré-irradiação sem fibra óptica; Grupo 3 – 1 minuto e pré irradiação com fibra óptica; Grupo 4 – 5 minutos de pré-irradiação sem fibra óptica; Grupo 5 - 5 minutos de pré-irradiação com fibra óptica; Grupo 6 – hipoclorito de sódio 2%. Teste microbiológico (contagem de UFCs) e microscopia eletrônica de varredura (MEV) foram realizados para avaliar a eficácia dos tratamentos propostos.
Resultados: A análise em microscopia electronica de varredura das paredes do canal radicular, nos três terçoes, bem como a análise microbiológica, revelou que o grupo 6 obteve o melhor resultado no processo de scontaminação. Não foram encontradas diferenças estatisticamente significantes na desinfecção do canal radicular comparando o uso ou não da fibra óptica.
Conclusão: Terapia fotodinâmica isoladamente não deveria ser utilizada na desinfecção do canal radicular, mas pode ser uma alternative viável como complemento a partir da utilização de diferentes métodos de limpeza.

Referências

Sundqvist G, Figdor D, Persson S, Sjögren U. Microbiologic analysis of teeth with endodontic treatment and the outcome of conservative retreatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1998;85:86-93. https://doi.org/10.1016/S1079-2104(98)90404-8

Molander A, Reit C, Dahlén G, Kvist T. Microbiological Status of root-filled teeth with apical periodontis. Int Endod J 1998;31(1):1-7. https://doi. org/10.1046/j.1365-591.1998.t01-1-00111.x

Love RM. Enterococcus faecalis – a mechanism for its role in endodontic failure. Int Endod J 2001;34(5):399-405. https://doi.org/10.1046/j.1365- 2591.2001.00437.x

Orstavik D, Haapasalo M. Disinfection by endodontic irrigants and dressings of experimentally infected dentinal tubules. Endod Dent Traumatol 1990;6(4):142-9. https://doi.org/10.1111/j.16009657.1990. tb00409.x

Byström A, Sundqvist G. The antibacterial action of sodium hypochlorite and EDTA in 60 cases of endodontic therapy. Int Endod J 1985;18(1): 35-40. https://doi.org/10.1111/j.1365-2591.1985.tb00416.x

Peters LB, Wesselink PR, Moorer WR. The fate and the role of bacteria left in root dentinal tubules. Int Endod J 1995;28(2):95-9. https://doi. org/10.1111/j.1365-2591.1995.tb00166.x

Cavalheiro FM. Assessment of bacterial reduction in contaminated root canals comparing three irradiation techniques with low power laser associated with a photosensitizer, an in vitro study [Dissertation]. São Paulo: Dental School of USP; 2007.

Williams JA, Pearson GJ, Colles MJ. Antibacterial action of photoactived disinfection {PAD} used on endodontic bacteria in planktonic suspension and in artificial and human root canals. J Dent 2006;34(6):363-71. https://doi.org/10.1016/j.jdent.2005.08.002

Kairalla EC. Study of the intracanal microbial reduction using a lowpower laser combined with a photosensitizer and a high-power laser. [Dissertation]. São Paulo: Dental School of USP;2006.

Seal GJ, NG YL, Spratt D, Bhatti M, Gulabivala K. An in vitro comparison of the bactericidal efficacy of lethal photosensitization or sodium hyphochlorite irrigation on Streptococcus Intermedius biofilm in root canals. Int Endod J 2002;35(3):268-74. https://doi.org/10.1046/j.1365- 2591.2002.00477.x

Lee MT, Bird PS, Walsh LJ. Photo-activated disinfection of the root canal: a new role for lasers in Endodontics. Aust Endod J 2004;30(3): 93-98. https://doi.org/10.1111/j.1747-4477.2004.tb00417.x

Usacheva MN, Teichert MC, Biel MA. Comparison of the methylene blue and toluidine blue photobactericidal efficacy against gram-positive and gram-negative microorganisms. Lasers Med Surg 2001;29:165-73. https:// doi.org/10.1002/lsm.1105

Schilke R, Bauss O, Lisson JA, Schuckar M, Geurtsen W. Bovine dentin as a substitute for human dentin in shear bond strength measurements. Am J Dent 1999;12(2):92-96.

Bhuva B, Patel S, Wilson R, Niazi S, Beighton D, Manocci F. The effectiveness of passive ultrasonic irrigation on intraradicular Enterococcus faecalis biofilms in extracted single-rooted human teeth. Int Endod J 2010;43:241-250. https://doi.org/10.1111/j.1365-2591.2009.01672.x

Chivatxaranukul P, Dashper SG, Messer HH. Dentinal Tubule invasion and adherence by Enterococcus Faecalis. Int Endod J 2008;41:873-882. https://doi.org/10.1111/j.1365- 2591.2008.01445.x

Walsh, LJ. The current status of low level laser therapy in dentistry. Part 2. Hard tissue applications. Aust Dent J 1997;42(5):302-6. https://doi. org/10.1111/j.1834-7819.1997.tb00134.x

Gonçalves, L. Effect of the photosensitizers used during the intracanal laser irradiation. [Dissertation]. São Paulo: Dental School of USP;2005.

Souza LC, Brito PRR, Oliveira JCM, Alves FRF, Moreira EJL, SampaioFilho HR, et al. Phodynamic Therapy with Two Differents Photosensitizers as a Supplement to Instrumentation/Irrigation Procedures in Promoting Intracanal Reduction of Enterococcus faecalis. J Endod 2010;36:292-6. https://doi.org/10.1016/j.joen.2009.09.041

Fonseca MB, Júnior PO, Pallota RC, Filho HF, Denardin OV, Rapoport A, et al. Photodynamic Therapy for Root Canals Infected with Enterococcus faecalis. Photomed Laser Surg 2008;26(3):209-13. https://doi.org/10.1089/ pho.2007.2124

Fimple JL, Fontana CR, Foschi F, Ruggiero K, Song X, Pagonis TC, et al. Photodynamic Treatment of Endodontic Polymicrobial Infection In Vitro. J Endod 2008;34:728-34. https://doi.org/10.1016/j.joen.2008.03.011

Estrela C, Sydney GB, Figueiredo JAP, Estrela CRA. A Model System to Study Antimicrobial Strategies on Endodontic Biofilms. J Appl Oral Sci 2009;17:87-91. https://doi.org/10.1590/S1678-77572009000200003

Ng R, Singh F, Papamanou DA, Song X, Patel C, Holewa C, et al. Endodontic Photodynamic Therapy Ex Vivo. J Endod 2011;37:217-22. https://doi.org/10.1016/j.joen.2010.10.008

Xu Y, Young MJ, Battaglino RA, Morse LR, Fontana CR, Pagonis TC, et al. Endodontic Antimicrobial Photodynamic Therapy: Safety Assessment in Mammalian Cell Cultures. J Endod 2009;35:1567-72. https://doi. org/10.1016/j.joen.2009.08.002

Meire MA, Prijck KD, Coenye T, Nelis HJ, Moor RJGD. Effectiveness of different laser systems to kill Enterococcus faecalis in aqueous suspension and in an infected tooth model. Int Endod J 2009;42:351-9. https://doi. org/10.1111/j.1365-2591.2008.01532.x

Gründling GL, Zechin JG, Jardim WM, Oliveira SD, Figueiredo JAP. Effect of Ultrasonics on Enterococcus faecalis Biofilm in a Bovine Tooth Model. J Endod 2011;37(8):1128-33. https://doi.org/10.1016/j.joen.2011.05.006

Downloads

Publicado

2016-12-26

Edição

Seção

Artigo Original