Evaluación in vitro de tres solventes de gutapercha

Abstract

El objetivo de ésta investigación fue evaluar la solubilidad de la gutapercha en tres solventes usados en endodoncia: xylol de uso tradicional y los aceites esenciales: eucaliptol y aceite de naranja, de uso reciente, dada la frecuente necesidad de remover las obturaciones del conducto en los procedimientos de retratamiento radicular. Ciento veinte muestras de gutapercha fueron preparadas en forma estandarizada en pequeños cilindros, siendo divididos equitativamente en cuatro grupos para su inmersión en los tres solventes de experimentacion y en agua destilada (grupo control) durante 2,5 y 10 minutos, a temperatura ambiente. La efectividad solvente fue registrada en gramos de pérdida de peso, calculando la diferencia entre el peso pre inmersión y post inmersión de las muestras, para cada tiempo experimental. Los resultados fueron analizados y comparados mediante la prueba de Tukey (p<0.05). Bajo las condiciones del presente estudio se concluye, que todos los solventes experimentales fueron efectivos para disolver la gutapercha. El xylol presentó efectos solventes superiores en todos los tiempos de experimentación. El aceite de naranja y eucaliptol presentaron efectos solventes similares.

Dissolution capacity of orange and eucalyptus oils versus endodontic types of cement (in vitro study)

“…Another type of solvent substance is xylol or xylene, which is a volatile solvent with less cytotoxicity than chloroform, however, it represents a risk for personal the health care staff because the vapors irritate mucous membranes, respiratory depression and CNS depression. 3,4,8,9 Essence oils are natural aromatic substances responsible for the fragrances of flowers and other plant organs. They are liquids with low solubility in water, soluble in alcohols, and organic solvents; yet biocompatibility with root canal tissues, orange oil has the highest biocompatibility among the solvents usually utilized and has even been shown to have lower cytotoxicity than eucalyptus oil and chloroform.…”

“…The elimination of the filling material from the root canal is a sine qua non to conduct retreatment, being thermal, chemical, mechanical, ultrasonic, or a combination of them, the frequent methods to accomplish this. [1][2][3] The most commonly utilized obturation material in endodontics is gutta-percha in combination with a variety of sealers cement. This can be removed without difficulty with mechanical methods associated with chemical (solvents); nonetheless, the sealing cement in charge of forming an impermeable barrier in the accessory canals and apical delta, tends to resist dissolution and is more difficult to remove from the root canal.…”

“…Conversely, xylol has no carcinogenic potential, although it is toxic to tissues. 3,4,[8][9][10] Both orange and eucalyptol essence oil are said to be a safe alternative with no carcinogenic potential, biocompatible, of low toxicity, and capable of dissolving most types of sealant cement. 8,[11][12][13] Considering the importance of minimizing the use of traditional solvents such as chloroform or xylol, proven to be harmful to health, and promoting the use of new organic solvents with enhanced clinical safety and timely chemical dissolution capacity, this research aims to compare the dissolution capacity of eucalyptus and orange essential oil versus three types of endodontic cements.…”