Comportamento mecânico comparativo de implantes dentários dos sistemas grand Morse e hexágono externo na região posterior do maxilar. Um estudo de análise de elementos finitos tridimensionais (3D-FEA)
DOI:
https://doi.org/10.33448/rsd-v13i10.47055Palavras-chave:
Análise por elementos finitos, Prótese dentária fixada por implante, Implante dentário, Maxila.Resumo
The increasing use of dental implants has boosted demand for innovative prosthetic solutions. These new forms and approaches aim to improve clinical handling and treatment quality, offering better results and greater efficiency in patient care. Among recent developments, the grand Morse connection has become popular, yet no scientific studies have compared its mechanical performance with external hexagon implants or Morse cone implants. The objective of this study was to comparatively assess the mechanical characteristics of two types of prosthetic connections (external hexagon and grand Morse) in posterior maxilla rehabilitation, employing the finite element method: external hexagon and grand Morse (4.0 mm x 8.0 mm - Hélix Neodent), both with screw-retained crowns. Virtual models were generated with CAD software Rhinoceros 7® based on a posterior maxillary segment’s bone shape from the BioCAD protocol. A primary-order tetrahedral 3D mesh was created for analysis, simulating 100N loads at a 30º angle to the implant axis. Results showed greater shifting in the external hexagon model (0.1399 mm) compared to the grand Morse model (0.0208 mm). Stress analysis revealed similar patterns near the implant platform, but the external hexagon model exhibited higher von Mises stress (148.4 MPa) compared to the grand Morse model (99.03 MPa), which had better stress dispersion. Maximum Principal Stress was higher for the grand Morse model. Thus, the implant platform connection design affects stress distribution and intensity.
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