Abstract
Most of the problems of endodontic origin have a bacterial etiological agent. Thus, there is a continued interest in seeking more effective chemical substances that can replace the camphorated paramonochiorophenol or antibiotics as intracanal medicaments. Among the possible substances, ozone has some interesting biological characteristics: bactericidal action, debriding effect, angiogenesis stimulation capacity and high oxidizing power. The purpose of this study was to chemically evaluate the presence of ozone in sunflower, castor, olive and almond oil, as well as in propylene glycol and byproducts of ozonation, such as formaldehyde. These compounds were ozonized, inserted into empty and sterile vials, and analyzed by testing the reaction between ozone and indigo, for determining the presence of ozone, and subjected to the chromotropic acid test for determining the presence of formaldehyde. It was observed complete absence of ozone in all samples tested and presence of formaldehyde. The bactericidal and healing action of ozonized oils could be attributed to products formed by the ozonation of mineral oils, such as formaldehyde, not to the ozone itself.
Highlights
Most of the problems of endodontic origin have a bacterial etiological agent
As bacteria and their byproducts are not often reached by the biomechanical action of instruments and chemicals, especially those located in the dentinal tubules, apical ramifications, areas of resorption and apical biofilm, the use of an antibacterial intracanal medication is recommended for disinfection of the root canal system in teeth with chronic periapical lesions [2]
Among the possible substances to be used in Endodontics, ozone has been considered as promising because it has some interesting biological characteristics: bactericidal action, debriding effect, angiogenesis stimulation capacity and high oxidizing power
Summary
Other factors of physical or chemical order may be involved, it is unquestionable that, in most cases, bacteria and their byproducts play a key role in the induction of pulpal and periradicular pathology [1]. As bacteria and their byproducts are not often reached by the biomechanical action of instruments and chemicals, especially those located in the dentinal tubules, apical ramifications, areas of resorption and apical biofilm, the use of an antibacterial intracanal medication is recommended for disinfection of the root canal system in teeth with chronic periapical lesions [2]. The purpose of this study was to chemically evaluate the presence of dissolved ozone in sunflower, castor, olive and almond oils, as well as in propylene glycol vehicle and byproducts usually formed after reaction with ozone and organic molecules containing double bonds of ozonation, such as formaldehyde
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