Reabilitação estética anterior pela técnica do facetamento: relato de Caso / Anterior aesthetic rehabilitation by the composite resin veneer technique: a case report

Objetivo: Objetivou-se relatar um caso clínico, no qual foi utilizada a técnica operatória de facetas estéticas diretas com resina composta, como alternativa de tratamento restaurador para dentes anteriores. Relato de caso:Realizou-se facetamento estético nos dentes 12, 11, 21 e 22 numa paciente do gênero feminino, 38 anos, que procurou a Clínica de Integração Odontológica da UFPB, insatisfeita comas restaurações antigas. O tratamento foi iniciado por endodontia e procedimentos periodontais, para possibilitar condição de higienização à paciente. Após a seleção de cor dos dentes, fez-se o isolamento do campo operatório e o preparo dos dentes utilizando as pontas diamantadas de números 1014 e 2135 (KG Sorensen, São Paulo, Brasil). As etapas seguintes incluíram condicionamento ácido da estrutura dentária, aplicação do sistema adesivo, inserção e escultura da resina composta e acabamento e polimento.Conclusão: Concluiu-se que a utilização de resinas compostas para a reabilitação estética de dentes anteriores representa uma alternativa conservadora e viável de tratamento odontológico, restituindo a saúde biológica e psicológica ao paciente.

Objective: This study aimed to present a clinical case reportin which aesthetic direct composite resin veneer technique was employed as a restorative alternative to treat anterior teeth. Case report: Aesthetic veneers were made on the maxillary anterior teeth of a patient, female, 38 years old,who attended the Integrated Dental Clinics at Federal University of Paraiba complaining of aesthetic dis satisfaction with her old fillings. The treatment was initiated by endodontic and periodontal procedures in order to provide the patient with hygiene conditions. After tooth color selection, isolation of operative field was performed and teeth were prepared using diamond burs #1014 and #2135 (KG Sorensen, SãoPaulo, Brazil). Subsequent steps consisted of dental acidetching, adhesive system application, and composite resin insertion, sculpture, finishing and polishing. Conclusion: It is concluded that the use of composite resins to aesthetically rehabilitate anterior teeth has represented a conservative and feasible alternative for dental treatment, and itreestablishes the patient’s biological and psychological health.

Analisis comparativo entre los experimentos mecanicos de cizallamiento y microcizallamiento / Comparative analysis between shear and mechanical experiments of micro shear and shear bond

Esta investigación analizó comparativamente los ensayos mecánicos de cizallamiento y microcizallamiento, a través de una evaluación de resistencia de unión dentina-compósito, utilizando dos técnicas de unión (autocondicionante y condicionamiento ácido total). Las coronas de cuarenta incisivos de bovinos fueron incluidas em tubos de PVC con resina acrílica. Las caras vestibulares fueron desgastadas hasta la exposición de tejido dentinario con hojas de lijar de carburo de silicio. Para la técnica de cizallamiento se delimito un área de 4mm de diámetro donde fue aplicado el sistema adhesivo de acuerdo con instrucciones del fabricante. Un cilindro de compósito restaurador (Filtek Z250 - 3M ESPE) de 4mm de diámetro y altura de 5mm fue construido en el área. Las muestras para el microcizallamiento fueron confeccionadas utilizando tubos de Tygon con diámetro interno de 0,7 mm y altura de 0,5mm en los cuales el mismo compósito restaurador fue colocado. La carga para ambos experimentos fue realizada a una velocidad de 1.0mm/min con alambre de ortodoncia de 0,3mm de diámetro. Los resultados muestran que para el experimento de cizallamiento el Adper Single Bond presentó valores estadísticamente superiores AL Clearfil SE Bond (p = 0,037). Para el microcizallamiento no hubo diferencias estadísticas (p = 0,780). Los cuerpos de prueba fueron sometidos al análisis de microscopia electrónica de barrido para clasificar el tipo de fractura. En el experimento de cizallamiento, existieron fallas adhesivas, cohesivas y mixtas en dentina para los dos sistemas adhesivos. En el experimento de microcizallamiento, se observó alta prevalencia de fallas adhesivas. Los resultados permitieron concluir que el microcizallamiento se mostró más apropiado para evaluar la resistencia de la unión adhesiva en la interfase compósito/dentina

The aim of this study was to evaluate comparatively the methodology of micro-shear and shear bond strength using the two available bonding strategies self etching and total etching techniques. Forty bovine incisors were cut and embedded in PVC tubes with acrylic resin. The buccal surfaces were flattened and exposed with SiC paper. For the shear bond strength test, an area of 4mm in diameter was delimited and the adhesive systems were applied according to the manufacturer's instructions. A composite cylinder (Filtek-Z250 - 3M ESPE) of 4mm diameter and 5mm height were built in the area. The samples for microshear were made use of Tygon tubes with 0,7mm in internal diameter in 0,5mm height, using the same composite. Loading were carried out at crosshead speed of 1,0mm/min using an orthodontic wire loop of 0,3mm diameter. The results showed that for shear test the Adper Single Bond presented higher values with statistical significance to Clearfil SE Bond (p=0,037). For the micro-shear test statistical difference was not observed (p=0,780). The samples were submitted to SEM for a fracture pattern classification. For the shear bond test were observed adhesive and dentin cohesive failures for both adhesive systems. For micro-shear bond test were observed a high prevalence of adhesive failures. According to the results it was possible to conclude that micro-shear bond test was more appropriated to evaluate the resistance of bond strength in interface composite/dentin

Pernos intrarradiculares de fibra de vidrio: caso clínico / Bolts fiberglass intraradicular: case report

La fragilidad de dientes com terapia endodontica es justifica da por la retirada significativa de tejido dentário durante el preparo del conducto. El surgimiento de pernos intrarradiculares tiene como finalidad disminuir el riesgo de fractura del remanecente dentario y la retención del material restaurador. Este trabajo presenta detalladamente un caso clinico, donde se utilizó un perno intrarradicular de fibra de vidrio, en una pieza dentaria anterior con terapia endodontica, destacando la facilidad de la técnica y una avaliación clínica después de un año y medio. Los autores concluyeron que seria prudente recomendar, para estos casos, el empleo de pernos de fibra de vidrio, para que las fuerzas masticatorias sean distribuidas al largo de la raíz, disminuyendo el riesgo de fracturas

The fragility of endodontically treated teeth is justified by the significant removal of dental tissue during the preparation of the duct. The use of the intraradicular posts tends to increase the resistance to fracture of the dental remainder and the retention of the restoring material. This work presents a clinical case in full detail, in which an intraradicular post of fiberglass was used in a dental element previously treated endodontically, highlighting the easiness of the technique and a clinical evaluation after one and a half year. The authors concluded that it is prudent to recommend the employment of posts of fiberglass for these cases to dissipate the masticatory loads along the root, which in turn decreases the risk of fractures