The effect of 8.25% sodium hypochlorite on dental pulp dissolution and dentin flexural strength and modulus

Journal of Endodontics
James K T CullenJohn M Yaccino

Abstract

The purpose of this study was to evaluate the effect of various concentrations of sodium hypochlorite (NaOCl), including 8.25%, on dental pulp dissolution and dentin flexural strength and modulus. Sixty dental pulp samples and 55 plane parallel dentin bars were retrieved from extracted human teeth. Five test groups (n = 10) were formed consisting of a pulp sample and dentin bar immersed in various NaOCl solutions. The negative control group (n = 5) consisted of pulp samples and dentin bars immersed in saline. The positive control group (n = 5) consisted of pulp samples immersed in 8.25% NaOCl without a dentin bar. Every 6 minutes for 1 hour, the solutions were refreshed. The dentin bars were tested for flexural strength and modulus with a 3-point bend test. The time until total pulp dissolution and any changes in dentin bar flexural strength and modulus for the different NaOCl solutions were statistically analyzed. An increase in NaOCl concentration showed a highly significant decrease in pulp dissolution time. The pulp dissolution property of 8.25% NaOCl was significantly faster than any other tested concentration of NaOCl. The presence of dentin did not have a significant effect on the dissolution capacity of NaOCl if the sol...Continue Reading

References

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Citations

Feb 2, 2010·Journal of Endodontics·Funda Kont CobankaraArslan Terlemez
Oct 30, 2007·Journal of Endodontics·Gustavo De-DeusSidnei Paciornik
Jan 30, 2007·Journal of Endodontics·Jamileh GhoddusiMajid Akbari
Nov 17, 2009·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Mohammad Ali SaghiriSahar Dadvand
Dec 14, 2017·Materials·Sowmya ShettyBill Kahler
Oct 2, 2020·European Journal of Dentistry·Garance VoegeliSerge Bouillaguet
Jan 20, 2021·Microscopy Research and Technique·Luciana S DemenechMarilisa C L Gabardo
Mar 10, 2020·Journal of Endodontics·Lara DottoGabriel Kalil Rocha Pereira

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