RESUMO
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.
Assuntos
Compostos de Alumínio , Análise de Variância , Compostos de Cálcio , Sulfato de Cálcio , Instrumentos Odontológicos/efeitos adversos , Infiltração Dentária , Combinação de Medicamentos , Durapatita , Cimentos de Ionômeros de Vidro/uso terapêutico , Humanos , Dente Molar , Óxidos , Distribuição Aleatória , Materiais Restauradores do Canal Radicular , Preparo de Canal Radicular/efeitos adversos , Silicatos , Estatísticas não Paramétricas , Raiz Dentária/lesõesRESUMO
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.