Silva-Herzog DF, Andrade VLM, Lainfiesta RJ

Language: Spanish
References: 12
Page: 14-18
PDF size: 86.10 Kb.

ABSTRACT

Calcium hydroxide [Ca(OH)₂] is a chemical compound used widely as a filler in root canal therapy, there is no criteria that allows the professionals in this area of dentistry as how to identify and use the proper vehicle for its combination, in this relies the upgrade of properties, among others; capacity to induce hard tissue formation, incidence to cause intratubular occlusion, antibacterial action and tissue dissolution capacity. This properties are based in the ionic dissociation capacity of the calcium hydroxide in calcium and hydroxyl ions. The purpose of this study was to analyze by means of atomic absorption spectrophotometry and potenciometry the calcium hydroxide behavior in different vehicles, due to the relationship that exists among low and sustained dissociation of this compound with its effect as a therapeutic agent in apex formation treatment, microorganisms elimination of infected root canal with periapical lesion, subjects of concern in endodontics. It was found in the research of the four vehicles: Propilenglycol, polietilenglycol 400, glycerin and Ringer solution at 24 h, 7,15, and 30 days. The calcium ion release of the different vehicles mixed with calcium hydroxide was obtained. The better behavior was Propilenglycol with 580 ppm (parts per million) at 7 days, followed by polietilenglycol 400 releasing 280 ppm, Ringer solution 270 ppm and glycerin only released 16.6 ppm. With respect to pH values it was maintained in a rank of 12.07 and 12.78 in the four analysis periods.

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