Based on the results, the splinting of pick-up impression copings is indicated for osseointegrated implant impressions. The square copings splinted with a prefabricated acrylic resin bar presented the best results among the pick-up impression techniques evaluated in this study.

Computer-aided design/computer-aided manufacturing images can be taken through either direct or indirect imaging. For the indirect systems, the digitalization is obtained from the impression material or cast, and for the direct ones the image is taken directly from the mouth using intraoral scanners.The direct acquisition systems have been constantly improved because these are less invasive, quicker, and more precise than the conventional method. Besides, the digital images can be easily stored for a long time. Therefore, the aim of this paper was to describe and discuss based on the literature the main direct image acquisition systems available on the market: CEREC Bluecam (Sirona), Lava C.O.S. System (3M ESPE), iTero System (Cadent/Straumann), and E4D System (D4D Technologies).

Within the limitations of this study, it was concluded that although the differences were not statistically significant, the use of a silicone investment layer when flasking complete dentures resulted in the least positional changes of the artificial teeth regardless of the polymerization technique.

During the process of facial rehabilitation, the mobility of ocular prostheses must be considered. Whereas some factors depend exclusively on the dentist, such as molding techniques and selection of material for denture construction, regarding ocular rehabilitation, factors, such as type of surgery, whether to adopt implants, and the use of lubricants, deserve special attention owing to their integration and their association with other factors pertaining exclusively to the patient. To establish harmony, and with the intention of aiding the dentist, after a discerning evaluation, the authors of this study report the factors that provide greater or less mobility to ocular prostheses and conceal the prosthesis in a more natural way, thereby contributing toward achieving a favorable aesthetic result in rehabilitations.

ResumoDentes tratados endodonticamente possuem redução da rigidez e resistência devido à perda da integridade estrutural. Este fato pode acarretar em longo prazo falhas biomecânicas, falta de elasticidade e de resistência à tração frente às forças mastigatórias, não sendo incomum que problemas mais graves como fraturas ocorram. Logo, a escolha da reabilitação funcional e estética desse paciente deve ser selecionada com muita cautela, já que a longevidade do tratamento endodôntico pode ser influenciada pela seleção do material restaurador, assim como do preparo protético do remanescente que conserve o máximo de estrutura dentária sadia. Este trabalho teve como objetivo apresentar uma revisão da literatura sobre o tema endocrown e ilustrar sua execução com caso clínico. O caso clínico evidenciou que a técnica endocrown está indicada para dentes posteriores, principalmente molares, que apresentem coroa clínica curta e espaço interoclusal insuficiente e estar associada às cerâmicas adesivas. Trata-se de um procedimento que visa à preservação da estrutura dental e resultados estéticos harmoniosos, além de executado em menos sessões clínicas. A literatura apoia que em comparação as tradicionais coroas totais, a resistência à fratura apresenta-se superior. É importante salientar que o sucesso clínico traduzido por longevidade e conforto é dependente do correto preparo e do uso das cerâmicas adesivas. Descritores: Prótese Dentária; Prótese Parcial Fixa; Dente Molar; Dente não Vital. AbstractEndodontically treated teeth have reduced rigidity and resistance due to loss of structural integrity. This fact can result in long-term problems of biomechanical failure, lack of elasticity and traction resistance of masticatory forces, it is not uncommon for more serious problems such as fractures occur. Therefore, the choice of functional and esthetic rehabilitation of these patients should be selected with caution, since the longevity of the endodontic treatment can be influenced by selection of the restorative material and a preparation that conserve as much healthy tooth structure. Thus, the aim of this work was to present a brief review of literature about the subject endocrown and illustrate their performance with clinical case. This case showed that endocrown technique is indicated to posterior teeth, especially molars, which have short clinical crown and insufficient interocclusal space and be associated with adhesive ceramic. This is a procedure that aims at preserving tooth structure and harmonious esthetic results, in addiction to execute on less clinical sessions. The literature supports that compared to traditional crowns, the fracture resistance has to be superior. It is Important to note that the clinical success translated by longevity and comfort is dependent on the correct preparation and use of adhesive ceramic. Descriptors: Dental Prosthesis; Denture, Partial, Fixed; Molar; Tooth, Nonvital. ResumenLos dientes tratados endodónticamente poseen una reducción de la rigidez y la resistencia debido a la pérdida de la ...