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BIBTEX RIS

Biomechanical influence of crown-to-implant ratio on stress distribution over internal hexagon short implant: 3-D finite element analysis with statistical test

2014; Elsevier BV; Volume: 48; Issue: 1 Linguagem: Inglês

10.1016/j.jbiomech.2014.10.021

1873-2380

Fellippo Ramos Verri, Joel Ferreira Santiago, Daniel Augusto de Faria Almeida, Guilherme Bérgamo Brandão de Oliveira, Victor Eduardo de Souza Batista, Heitor Marques Honório, Pedro Yoshito Noritomi, Eduardo Piza Pellizzer,

Dental Radiography and Imaging

The study of short implants is relevant to the biomechanics of dental implants, and research on crown increase has implications for the daily clinic. The aim of this study was to analyze the biomechanical interactions of a singular implant-supported prosthesis of different crown heights under vertical and oblique force, using the 3-D finite element method. Six 3-D models were designed with Invesalius 3.0, Rhinoceros 3D 4.0, and Solidworks 2010 software. Each model was constructed with a mandibular segment of bone block, including an implant supporting a screwed metal–ceramic crown. The crown height was set at 10, 12.5, and 15 mm. The applied force was 200 N (axial) and 100 N (oblique). We performed an ANOVA statistical test and Tukey tests; p 0.05) under axial load. However, crown heights of 12.5 and 15 mm caused statistically significant damage to the stress distribution of screws and to the cortical bone (p<0.001) under oblique load. High crown to implant (C/I) ratio harmed microstrain distribution on bone tissue under axial and oblique loads (p<0.001). Crown increase was a possible deleterious factor to the screws and to the different regions of bone tissue.