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Influence of bicortical techniques in internal connection placed in premaxillary area by 3D finite element analysis

Author

Listed:
  • Fellippo Ramos Verri
  • Ronaldo Silva Cruz
  • Cleidiel Aparecido Araújo Lemos
  • Victor Eduardo de Souza Batista
  • Daniel Augusto Faria Almeida
  • Ana Caroline Gonçales Verri
  • Eduardo Piza Pellizzer

Abstract

The aim of study was to evaluate the stress distribution in implant-supported prostheses and peri-implant bone using internal hexagon (IH) implants in the premaxillary area, varying surgical techniques (conventional, bicortical and bicortical in association with nasal floor elevation), and loading directions (0°, 30° and 60°) by three-dimensional (3D) finite element analysis. Three models were designed with Invesalius, Rhinoceros 3D and Solidworks software. Each model contained a bone block of the premaxillary area including an implant (IH, Ø4 × 10 mm) supporting a metal-ceramic crown. 178 N was applied in different inclinations (0°, 30°, 60°). The results were analyzed by von Mises, maximum principal stress, microstrain and displacement maps including ANOVA statistical test for some situations. Von Mises maps of implant, screws and abutment showed increase of stress concentration as increased loading inclination. Bicortical techniques showed reduction in implant apical area and in the head of fixation screws. Bicortical techniques showed slight increase stress in cortical bone in the maximum principal stress and microstrain maps under 60° loading. No differences in bone tissue regarding surgical techniques were observed. As conclusion, non-axial loads increased stress concentration in all maps. Bicortical techniques showed lower stress for implant and screw; however, there was slightly higher stress on cortical bone only under loads of higher inclinations (60°).

Suggested Citation

  • Fellippo Ramos Verri & Ronaldo Silva Cruz & Cleidiel Aparecido Araújo Lemos & Victor Eduardo de Souza Batista & Daniel Augusto Faria Almeida & Ana Caroline Gonçales Verri & Eduardo Piza Pellizzer, 2017. "Influence of bicortical techniques in internal connection placed in premaxillary area by 3D finite element analysis," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(2), pages 193-200, January.
    • Handle: RePEc:taf:gcmbxx:v:20:y:2017:i:2:p:193-200
    DOI: 10.1080/10255842.2016.1209188
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    1. Fellippo Ramos Verri & Ronaldo Silva Cruz & Victor Eduardo de Souza Batista & Daniel Augusto de Faria Almeida & Ana Caroline Gonçales Verri & Cleidiel Aparecido de Araújo Lemos & Joel Ferreira Santiag, 2016. "Can the modeling for simplification of a dental implant surface affect the accuracy of 3D finite element analysis?," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 19(15), pages 1665-1672, November.
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