RESUMEN
Artificial communication between the root canal system and supporting tissues of the tooth lowers the prognosis of the endodontic treatment. Studies have found that the second most common reason for failure association with endodontic treatment is root perforation. Hence a study was undertaken to evaluate the effect of calcium sulphate, hydroxylapatite and MTA as internal matrix and their ability on the sealing ability of the perforation repair material (GIC) on 70 recently extracted molar with non fused roots. MTA showed the least microleakage and best sealing ability and resin modified GIC when used alone without any internal matrix showed maximum microleakage and least sealing ability.
Asunto(s)
Compuestos de Aluminio , Análisis de Varianza , Compuestos de Calcio , Sulfato de Calcio , Instrumentos Dentales/efectos adversos , Filtración Dental , Combinación de Medicamentos , Durapatita , Cementos de Ionómero Vítreo/uso terapéutico , Humanos , Diente Molar , Óxidos , Distribución Aleatoria , Materiales de Obturación del Conducto Radicular , Preparación del Conducto Radicular/efectos adversos , Silicatos , Estadísticas no Paramétricas , Raíz del Diente/lesionesRESUMEN
The long term clinical success of composite restoration depends upon appropriate curing light sources. This in-vitro comparative study investigates the influence of conventional halogen and light emitting diode curing sources on the surface hardness, depth of cure and polymerization shrinkage of composites specimens of 8 mm diameter and 10 mm in height were used to study the depth of cure. Specimens of dimension 8.6 mm in diameter and 2 mm in depth were used to measure the surface hardness and polymerization shrinkage. The results showed that in the long run LED's seem to have great potential to achieve a clinically consistent quality of composite cure.