Stress distribution in implant-supported prostheses using different connection systems and cantilever lengths: digital photoelasticity

Journal of Medical Engineering & Technology
Marcelo Coelho GoiatoCleudmar Amaral de Araújo

Abstract

Photoelastic analysis was used to evaluate the biomechanical behaviour of implant-supported, double-screwed crowns with different connection systems and cantilever lengths. Three models were made in PL-2 photoelastic resin and divided into six groups, on the basis of the implant connection system (external hexagon [EH] or Morse taper [MT]), type of abutment (Mini Pilar [Neodent, Curitiba, Paraná, Brazil] or "UCLA") and number of crowns in the cantilever (one or two). The implant-prosthesis unit was placed in a circular polariscope. Occlusal surfaces of the crowns were subjected to 100-N loads in the axial and oblique (45°) directions in a universal testing machine (EMIC). Generated stresses were recorded and analysed qualitatively in a graphics program (Adobe Photoshop). Under axial loading, all of the groups had similar numbers of fringes, which were increased when the crowns were subjected to oblique loading. The highest number of fringes was found during oblique loading in the EH + Mini Pilar group. In conclusion, although the type of implant connection system did not have a direct influence on the stress distribution for axial loading, the cantilever length did have a direct influence on stress distribution. Models with two...Continue Reading

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Citations

Mar 30, 2017·Journal of Medical Engineering & Technology·Marcelo Coelho GoiatoDaniela Micheline Dos Santos
Sep 27, 2018·Journal of Medical Engineering & Technology·Marcelo Coelho GoiatoDaniela Micheline Dos Santos
Jun 1, 2019·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Yiqing Huang, Jiawei Wang
Dec 13, 2018·The Journal of Oral Implantology·Mitsuharu NagaoRyuji Hosokawa
Sep 4, 2020·European Journal of Dentistry·Dinesh RokayaPasutha Thunyakitpisal

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