Stress distribution of different implant connections associated with multiple implant-supported prostheses

• Autor(a) principal: Goiato, Marcelo Coelho [UNESP]
• Data de Publicação: 2018
• Outros Autores: Sarauza Arsufi, Guilherme [UNESP], de Medeiros, Rodrigo Antonio, Pesqueira, Aldiéris Alves [UNESP], da Silva, Emily Vivianne Freitas [UNESP], Sonego, Mariana Vilela [UNESP], dos Santos, Daniela Micheline [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1080/03091902.2018.1513575; http://hdl.handle.net/11449/188110
• topic: Dental implants; dental prosthesis; implant-supported; photoelastic analysis

In some clinical situations, the clinician may encounter previously installed implants that should be associated with other implants for a proper rehabilitation. The aim of this study was to evaluate the biomechanical behaviour of a multiple prosthesis joined by different implant connections using photoelasticity. Photoelastic models with a screwed fixed prosthesis supported by implants with different connection systems (Morse taper, external hexagon, internal hexagon, and Flexcone), and different combinations among them, were fabricated. Each assembly was placed in a circular polariscope, and axial and oblique (45°) loads of 100 N were applied on the occlusal surface of the crowns. The fringe patterns were photographed and the analysis was performed by counting the number of high-intensity fringes and also according to the stress distribution region where they appeared. Among implants of the same connection, the external connections obtained a greater number of high intensity fringes when compared to the internal connections. From the biomechanical point of view, the association between different types of connections obtained positive results.