Técnica socket shield: análise da distribuição de tensões
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2019-04-30
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Universidade Federal de Goiás
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Objective: To compare, by means of a three-dimensional finite element method, the influence of
the Socket Shield (SS) technique on the stress distribution on peri-implant bone, implants and
prosthetic componentes in comparison to other techniques for rehabilitation of anterosuperior
tooth loss. Material and method: Geometrical models of a implant-supported central incisor were
designed by simulating three different placement techniques: SS group, with a 2,5mm-thick
radicular dentine fragment positioned within the buccal alveolar wall and the implant;
Heterogeneous Graft (HG) group, with a heterogenous bovine bone grafting material placed
within the buccal alveolar wall and the implant; and control group, with the entire implant in
contact with bone tissue of a healed alveolar ridge. Models were loaded with 100 N on the palatal
surface (angled to 45º in relation to tooth long axis to simulate maximum intercuspation) and 25
N perpendicular to the incisal edge (to simulate "edge-to-edge” contact). Maximum stresses
(tensile, shear and compressive) and displacement in the bone tissue including the alveolar crest
cortical plate, trabecular bone, root dentin and bone graft were analyzed. Von Mises equivalent
stress was evaluated for the implants and prosthetic components. Results: Higher stress values for
bone tissue were observed for SS and HG groups in comparison to control. Stress values within
groups were not significant different for dentin fragment, bone graft, implant and prosthetic
components. Conclusion: Stress concentration in the bone tissue was higher for SS, followed by
HG and control group.
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NEVES, Ricardo Guimarães. Técnica socket shield: análise da distribuição de tensões. 2019. 82 f. Tese (Doutorado em Odontologia) - Universidade Federal de Goiás, Goiânia, 2019.