Biomechanical behavior of CAD/CAM cobalt-chromium and zirconia full-arch fixed prostheses
Thaís Barbin, Letícia Del Rio Silva, Daniele Valente Velôso, Guilherme Almeida Borges, Anna Gabriella Camacho Presotto, Valentim Adelino Ricardo Barão, Francisco Carlos Groppo, Marcelo Ferraz Mesquita
ARTIGO
Inglês
To verify the influence of computer-aided design/computer-aided manufacturing (CAD/CAM) implant-supported prostheses manufactured with cobalt-chromium (Co-Cr) and zirconia (Zr), and whether ceramic application, spark erosion, and simulation of masticatory cycles modify biomechanical parameters...
Ver mais
To verify the influence of computer-aided design/computer-aided manufacturing (CAD/CAM) implant-supported prostheses manufactured with cobalt-chromium (Co-Cr) and zirconia (Zr), and whether ceramic application, spark erosion, and simulation of masticatory cycles modify biomechanical parameters (marginal fit, screw-loosening torque, and strain) on the implant-supported system. Ten full-arch fixed frameworks were manufactured by a CAD/CAM milling system with Co-Cr and Zr (n=5/group). The marginal fit between the abutment and frameworks was measured as stated by single-screw test. Screw-loosening torque evaluated screw stability, and strain analysis was explored on the implant-supported system. All analyses were performed at 3 distinct times: after framework manufacturing; after ceramic application in both materials' frameworks; and after the spark erosion in Co-Cr frameworks. Afterward, stability analysis was re-evaluated after 106 mechanical cycles (2 Hz/150-N) for both materials. Statistical analyses were performed by Kruskal-Wallis and Dunn tests (α=.05).No difference between the two materials was found for marginal fit, screw-loosening torque, and strain after framework manufacturing (P>.05). Ceramic application did not affect the variables (P>.05). Spark erosion optimized marginal fit and strain medians for Co-Cr frameworks (P<.05). Screw-loosening torque was significantly reduced by masticatory simulation (P<.05) regardless of the framework materials.Co-Cr and Zr frameworks presented similar biomechanical behavior. Ceramic application had no effect on the biomechanical behavior of either material. Spark erosion was an effective technique to improve Co-Cr biomechanical behavior on the implant-supported system. Screw-loosening torque was reduced for both materials after masticatory simulation
Ver menos
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
306373/2015-7
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
001
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2017/15297-0; 2017/16303-3
Fechado
Biomechanical behavior of CAD/CAM cobalt-chromium and zirconia full-arch fixed prostheses
Thaís Barbin, Letícia Del Rio Silva, Daniele Valente Velôso, Guilherme Almeida Borges, Anna Gabriella Camacho Presotto, Valentim Adelino Ricardo Barão, Francisco Carlos Groppo, Marcelo Ferraz Mesquita
Biomechanical behavior of CAD/CAM cobalt-chromium and zirconia full-arch fixed prostheses
Thaís Barbin, Letícia Del Rio Silva, Daniele Valente Velôso, Guilherme Almeida Borges, Anna Gabriella Camacho Presotto, Valentim Adelino Ricardo Barão, Francisco Carlos Groppo, Marcelo Ferraz Mesquita
Fontes
|
The Journal of Advanced Prosthodontics Vol. 12, no. 6 (Dec., 2020), p. 329-337 |