Analysis of bovine pulp tissue dissolution ability by photodynamic therapy: an in vitro study

Authors

  • Liviu Steier Warwick Dentistry, Warwick Medical School
  • Giampiero Rossi-Fedele Warwick Dentistry, Warwick Medical School
  • Monique Acauan
  • Priscila Bianchini
  • Matheus Albino Souza Pontifical Catholic University of Rio Grande do Sul
  • José Antônio Poli de Figueiredo Pontifical Catholic University of Rio Grande do Sul

Keywords:

Pulp dissolution, sodium hypochlorite, photodynamic therapy

Abstract

Purpose: To evaluate the bovine pulp tissue dissolution ability of photodynamic therapy. Methods: Twenty pieces of bovine pulp tissue were weighed and divided randomly into four groups (n=5), according to the cleaning protocol: G1 - distilled water (negative control), G2 - sodium hypochlorite 1% (positive control), G3 - photodynamic therapy, G4 - sodium hypochlorite 1% + photodynamic therapy. The observation of the events of dissolution was performed by two observers blinded in relation to the test using 2x magnification, recording time in minutes until complete tissue dissolution. The total observation time was 2 hours. The dissolution rate was calculated dividing the weight of the fragment pulp (mg) by the time of dissolution (mg/min). Results: Only group 2 (NaOCl) was able to promote complete dissolution of pulp tissue. In the other groups there was no occurrence of complete dissolution of the samples. The mean dissolution time for samples from group 2 (NaOCl) was 1.26 mg/min. Conclusion: Only the sodium hypochlorite was able to dissolve the fragments of bovine pulp tissue and photodynamic therapy does not show ability to dissolve tissue.

Author Biographies

Liviu Steier, Warwick Dentistry, Warwick Medical School

Professor Warwick Dentistry, University of Warwick, Coventry, United Kingdom

Giampiero Rossi-Fedele, Warwick Dentistry, Warwick Medical School

Professor Warwick Dentistry, University of Warwick, Coventry, United Kingdom

Monique Acauan

Graduate Student School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil

Priscila Bianchini

Graduate Student School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil

Matheus Albino Souza, Pontifical Catholic University of Rio Grande do Sul

Graduate Student School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil

José Antônio Poli de Figueiredo, Pontifical Catholic University of Rio Grande do Sul

Professor School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil

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Published

2011-02-14

Issue

Vol. 26 No. 1 (2011)

Section

Original Article

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