Pino de fibra de vidro anatômico: relato de caso / Anatomic glass fiber post: case report

Introdução: Pinos pré-fabricados de fibra de vidro possuem boas propriedades mecânicas e estéticas. Porém, estes podem não se adaptar bem em canais amplos ou excessivamente cônicos prejudicando sua retenção ao canal radicular. Uma alternativa para esta desvantagem, é a utilização da técnica de pino anatômico. Objetivo: O objetivo do relato de caso foi apresentar a técnica de confecção de um pino fibra de vidro anatômico em dente anterior com reduzido remanescente coronário e ampla embocadura do canal radicular. Relato de Caso: Paciente masculino, 49 anos, procurou atendimento odontológico com queixa da aparência estética de seus dentes anteriores superiores. Após remoção de uma coroa metalocerâmica e um pino-núcleo metálico fundido do elemento 12, foram confeccionados um pino de fibra de vidro anatômico, núcleo de preenchimento e coroa provisória. Foram realizadas as facetas em resina composta nos elementos 13, 11, 21, 22 e 23. Uma coroa de cerâmica reforçada por dissilicato de lítio (IPS e.max CAD, Ivoclar Vivadent) foi cimentada no elemento 12. Conclusões: Através da técnica pino de fibra de vidro anatômico, é possível reabilitar dentes anteriores tratados endodonticamente sem a utilização de pinos metálicos, apresentando bons resultados estéticos. Entretanto, uma condição oclusal dentro dos princípios de uma oclusão mutuamente protegida deve ser almejada para garantir longevidade da restauração(AU)

Introduction: Prefabricated glass fiber posts present good mechanical and esthetic proprieties. However, these may not fully fit in large canal or excessively conical damaging your retention in the root canal. An alternative to this disadvantage, it is the use of post anatomic technique. Aim: the aim of the case report was to present the technique to obtain an anatomic glass fiber post in anterior teeth with reduced coronal remaining and large access of the root canal. Case Report: Man patient 49 year-old searched dental care with complaint of the esthetic appearance of your anterior maxillary teeth. After the removal of a metalceramic crown and a cast core and post of the tooth 12, an anatomic glass fiber post, resin core and interim crown were performed. Direct composite resin veneers were performed in the teeth 13, 11, 21, 22 and 23. A crown of reinforced lithium disilicate ceramic (IPS e.max CAD, Ivoclar Vivadent) was luted at tooth 12. Conclusions: It is possible to restore endodontically treated teeth without to use metal posts presenting improved esthetic results using the technique of anatomic glass fiber post. However, an occlusal condition concerning the principles of protected occlusion must be founded to guarantee a long-term restoration(AU)

Calcium hypochlorite as a dentin deproteinization agent: Microleakage, scanning electron microscopy and elemental analysis.

PURPOSE: This study investigated the influence of collagen removal with calcium hypochlorite on the surface morphology of acid-etched dentin and on the microleakage of composite restorations. In addition, the elemental composition (EC) of dentin after removal of the collagen fibrils was analyzed. MATERIALS AND METHODS: Forty third molars received two cavities and were divided into four groups according to dentin treatment: CTRL-no pre-treatment; Na10-10% NaOCl for 30 s; Ca10-10% CaOCl for 30 s, and Ca15-15% CaOCl for 30 s. The cavities were filled using an acetone-based adhesive system and a resin composite; they were then subjected to thermal cycling for 5,000 cycles, immersed in methylene blue for 4 h and sectioned into 1-mm thick slabs. Two examiners evaluated two slices per tooth using a stereomicroscope and assigned the degree of infiltration (scores 0-3). The data were analyzed using the Kruskal-Wallis (α = 0.05). Four teeth received surface treatment according to the groups and were submitted to SEM and EDS to carry at the EC. RESULTS: There was no significant difference between the experimental groups (P = 0.533). CaOCl alters the morphology and surface composition of the dentin, resulting in an increase in the amount of calcium in the interface. CONCLUSIONS: When used prior to an acetone-based adhesive system, CaOCl did not produce any differences in microleakage when compared to the CTRL group or to the Na10 group.