Computer‐aided design and computer‐aided manufacturing indirect versus direct composite restorations: A randomized clinical trial

2021 ◽  
Author(s):  
Carlos Rocha Gomes Torres ◽  
Adrielle Caroline Moreira Andrade ◽  
Ana Paula Valente Pinho Mafetano ◽  
Fabrícia Stabile de Abreu ◽  
Danilo de Souza Andrade ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Computer Aided Design ◽  
Computer Aided Manufacturing ◽  
Composite Restorations ◽  
Computer Aided ◽  
Aided Design

scholarly journals Fractography of clinically fractured, implant-supported dental computer-aided design and computer-aided manufacturing crowns

2017 ◽  
Vol 5 ◽  
pp. 2050313X1774101 ◽  
Author(s):  
Ulrich Lohbauer ◽  
Renan Belli ◽  
Marco S Cune ◽  
Ulf Schepke
Keyword(s):  
Clinical Trial ◽  
Water Absorption ◽  
Computer Aided Design ◽  
Interfacial Stress ◽  
Computer Aided Manufacturing ◽  
Implant Abutments ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Zirconia Implant

Today, a substantial part of the dental crown production uses computer-aided design and computer-aided manufacturing (CAD/CAM) technology. A recent step in restorative dentistry is the replacement of natural tooth structure with pre-polymerized and machined resin-based methacrylic polymers. Recently, a new CAD/CAM composite was launched for the crown indication in the load-bearing area, but the clinical reality forced the manufacturer to withdraw this specific indication. In parallel, a randomized clinical trial of CAD/CAM composite crowns luted on zirconia implant abutments revealed a high incidence of failure within the first year of service. Fractured crowns of this clinical trial were retrieved and submitted to a fractographic examination. The aim of the case series presented in this article was to identify failure reasons for a new type of CAD/CAM composite crown material (Lava Ultimate; 3M Oral Care, St. Paul, Minnesota, USA) via fractographic examinations and analytical assessment of luting surfaces and water absorption behavior. As a result, the debonding of the composite crowns from the zirconia implant abutments was identified as the central reason for failure. The adhesive interface was found the weakest link. A lack of silica at the zirconia surface certainly has compromised the bonding potential of the adhesive system from the beginning. Additionally, the hydrolytic stress released from swelling of the resin-based crown (water absorption) and transfer to the luting interface further added to the interfacial stress and most probably contributed to a great extend to the debonding failure.

scholarly journals Um experimento de fabricação digital: parametrização, prototipagem e fabricação de painel.

2017 ◽  
Vol 1 (1) ◽  
pp. 81
Author(s):  
Jorge Alcântara Filho ◽  
Letícia Mendes
Keyword(s):  
Computer Aided Design ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Aided Design

consistentes e cada vez mais presentes nos campos de design e construção. A presença cada vez mais significativa dos sistemas de representação e fabricação com auxílio de computador (Computer Aided Design e Computer Aided Manufacturing) na concepção dos mais variados artefatos, tem sido um assunto muito discutido nos diversos campos da indústria criativa. Paralelamente à esta discussão, a introdução da abordagem projetual paramétrica tem uma grande importância na obtenção de novas perspectivas e inovação no design. Dessa forma, com o intuito de associar o potencial das ferramentas de prototipagem rápida e fabricação digital e de um sistema generativo de projeto, este artigo descreve o desenvolvimento de um projeto de mobiliário – um painel para exposição de objetos e organizador de ferramentas - através da documentação detalhada dos processos e procedimentos realizados para sua conclusão e desdobramentos acerca da mudança de paradigma no processo de projeto, condizente com a potencialidade dos recursos digitais. O texto do resumo deve ser escrito em Cambria tamanho 10, justificado, espaçamento simples, antes 0, depois 0. Deve possuir no máximo 200 palavras. O texto deve ser escrito em um único parágrafo e conter as informações principais do artigo como objetivos, resultados, métodos, etc.

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