RESUMEN
The purpose of this study was to determine the effect of calcium sulfate (CS) on cementum deposition and osseous healing after periradicular surgery. The root canals of 24 mandibular premolars in four 2-yr-old beagle dogs were endodontically treated, followed 2 weeks later by periradicular surgery. Mineral trioxide aggregate (MTA) was used as root-end-filling material. The right or left side was assigned at random to receive CS alpha-hemihydrate or no material in the osteotomy sites before closure. The animals were killed after 4 months. Hard-tissue healing was analyzed histomorphometrically. All samples displayed evidence of cementum deposition adjacent to the root-end fillings and bone regeneration in the osteotomy sites. The data was analyzed using the Mann-Whitney U test, comparing the scores for cementum and osseous healing of the two groups at significance level of alpha = 0.05. The results indicated that placement of CS in osteotomy sites after periradicular surgery does not significantly affect periradicular healing.
Asunto(s)
Apicectomía , Sustitutos de Huesos/uso terapéutico , Sulfato de Calcio/uso terapéutico , Mandíbula/cirugía , Compuestos de Aluminio/uso terapéutico , Proceso Alveolar/efectos de los fármacos , Animales , Diente Premolar/patología , Regeneración Ósea/efectos de los fármacos , Compuestos de Calcio/uso terapéutico , Cemento Dental/fisiología , Perros , Combinación de Medicamentos , Procesamiento de Imagen Asistido por Computador , Mandíbula/efectos de los fármacos , Óxidos/uso terapéutico , Distribución Aleatoria , Obturación Retrógrada , Materiales de Obturación del Conducto Radicular/uso terapéutico , Tratamiento del Conducto Radicular , Silicatos/uso terapéutico , Estadísticas no Paramétricas , Cicatrización de Heridas/efectos de los fármacosRESUMEN
The purpose of this study was to compare the effect of fresh mineral trioxide aggregate (MTA) with set MTA on hard-tissue healing after periradicular surgery. The root canals of 24 mandibular premolars in four 2-yr-old beagle dogs were filled with MTA. Two weeks later the root ends of half of the samples were surgically exposed and resected to the set MTA within the canals. After exposing and resecting the other 12 root ends, they were prepared with ultrasonic instrumentation and preparations were filled with fresh MTA. After 4 months, the animals were killed. Hard-tissue healing was analyzed histomorphometrically. The results indicated that although freshly placed MTA resulted in a significantly higher incidence of cementum formation (12 of 12 versus 8 of 12, p = 0.028), there is no significant difference in the quantity of cementum or osseous healing associated with freshly placed or set MTA when used as root-end-filling material.