Restabelecendo a estética anterior: aplicação personalizada de cerâmica em coroas ametálicas / Restablishing anterior esthetics: customized application of ceramics in metal-free crowns

O caso clínico aqui exposto foi realizado em um paciente jovem que apresentava os elementos 11 e 12 com tratamento endodôntico, núcleos metálicos fundidos, remanescentes radiculares escurecidos, desalinhamento do colo cervical e coroas puras de porcelana acinzentadas. Foi planejado clareamento dental, remoção dos núcleos metálicos, retratamento endodôntico de ambos os elementos, confecção de pinos de fibra de vidro anatomizados com resina composta, cirurgia plástica gengival para recontorno cervical e novas coroas em cerâmica pura com estrutura de dissilicato de lítio.

The clinical case was performed in a young patient that presented both maxillary central incisors with endodontic treatment, cast post-and-cores, darkened root remnants, lack of uniform cervical margins and grayish appearance of all-ceramic crowns. Treatment planning comprised bleaching treatment, removal of the cast post-and-cores, endodontic retreatment of both teeth, fiber-reinforced core build-up using fiber posts and composite resin, periodontal plastic surgery for recontouring of cervical margins and new lithium dissilicate all-ceramic crowns.

Enamel susceptibility to red wine staining after 35 percent hydrogen peroxide bleaching

Concern has been expressed regarding the staining of enamel surface by different beverages after bleaching. This study investigated the influence of 35% hydrogen peroxide bleaching agents on enamel surface stained with wine after whitening treatments. Flat and polished bovine enamel surfaces were submitted to two commercially available 35% hydrogen peroxide bleaching agents or kept in 100% humidity, as a control group (n = 10). Specimens of all groups were immersed in red wine for 48 h at 37°C, immediately, 24 h or 1 week after treatments. All specimens were ground into powder and prepared for the spectrophotometric analysis. Data were subjected to two-way analysis of variance and Fisher’s PLSD test at 5% significance level. The amount of wine pigments uptake by enamel submitted to bleaching treatments was statistically higher than that of control group, independently of the evaluation time. Results suggested that wine staining susceptibility was increased by bleaching treatments.