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1.
Braz Oral Res ; 33: e005, 2019 Feb 11.
Artículo en Inglés | MEDLINE | ID: mdl-30758405

RESUMEN

The objective of this study was to assess the influence of chlorhexidine (liquid and gel) and zinc oxide in calcium hydroxide (CH) pastes on root pH in simulated external resorption. One hundred human anterior teeth with a single root canal were selected. After decoronation and root canal instrumentation, the specimens were divided into 4 experimental groups and 1 control group (without intracanal paste): CH + saline (CH+S), CH + 2% chlorhexidine liquid (CH+ CHX), CH + 2% chlorhexidine gel (CH+ CHXg), and CH + 2% chlorhexidine gel + zinc oxide (CH+ CHXg+ZnO). pH was measured using a microelectrode at 3 and 24 h, and 1, 2, 3, and 4 weeks after inserting intracanal pastes. Data were analyzed statistically using an ANOVA and Tukey's test (p < 0.05). The CH+CHXg+ZnO group had the highest pH values throughout (p<0.05). The CH+S and CH+ CHX groups had the highest pH values after 1 week and the CH+ CHXg group after 2 weeks. CH+ CHXg maintained the highest pH until the fourth week compared with CH+ CHX (p < 0.05). The control group remained at a neutral pH at all evaluated times. It can be concluded that chlorhexidine solution or gel maintained the alkaline pH of CH, and chlorhexidine gel allowed a slower decrease in pH over time. CH+ CHXg+ZnO showed the highest pH values and was an effective intracanal medication for maintaining alkaline root pH in the area of resorption.


Asunto(s)
Hidróxido de Calcio/química , Clorhexidina/química , Irrigantes del Conducto Radicular/química , Raíz del Diente/efectos de los fármacos , Óxido de Zinc/química , Análisis de Varianza , Geles , Humanos , Concentración de Iones de Hidrógeno , Ensayo de Materiales , Pomadas , Valores de Referencia , Reproducibilidad de los Resultados , Resorción Radicular/tratamiento farmacológico , Estadísticas no Paramétricas , Propiedades de Superficie/efectos de los fármacos , Factores de Tiempo
2.
Braz. oral res. (Online) ; 33: e005, 2019. tab
Artículo en Inglés | LILACS | ID: biblio-989474

RESUMEN

Abstract The objective of this study was to assess the influence of chlorhexidine (liquid and gel) and zinc oxide in calcium hydroxide (CH) pastes on root pH in simulated external resorption. One hundred human anterior teeth with a single root canal were selected. After decoronation and root canal instrumentation, the specimens were divided into 4 experimental groups and 1 control group (without intracanal paste): CH + saline (CH+S), CH + 2% chlorhexidine liquid (CH+ CHX), CH + 2% chlorhexidine gel (CH+ CHXg), and CH + 2% chlorhexidine gel + zinc oxide (CH+ CHXg+ZnO). pH was measured using a microelectrode at 3 and 24 h, and 1, 2, 3, and 4 weeks after inserting intracanal pastes. Data were analyzed statistically using an ANOVA and Tukey's test (p < 0.05). The CH+CHXg+ZnO group had the highest pH values throughout (p<0.05). The CH+S and CH+ CHX groups had the highest pH values after 1 week and the CH+ CHXg group after 2 weeks. CH+ CHXg maintained the highest pH until the fourth week compared with CH+ CHX (p < 0.05). The control group remained at a neutral pH at all evaluated times. It can be concluded that chlorhexidine solution or gel maintained the alkaline pH of CH, and chlorhexidine gel allowed a slower decrease in pH over time. CH+ CHXg+ZnO showed the highest pH values and was an effective intracanal medication for maintaining alkaline root pH in the area of resorption.


Asunto(s)
Humanos , Irrigantes del Conducto Radicular/química , Raíz del Diente/efectos de los fármacos , Óxido de Zinc/química , Hidróxido de Calcio/química , Clorhexidina/química , Pomadas , Valores de Referencia , Resorción Radicular/tratamiento farmacológico , Propiedades de Superficie/efectos de los fármacos , Factores de Tiempo , Ensayo de Materiales , Reproducibilidad de los Resultados , Análisis de Varianza , Estadísticas no Paramétricas , Geles , Concentración de Iones de Hidrógeno
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