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Type: Artigo de periódico
Title: Non-linear 3d Finite Element Analysis Of Full-arch Implant-supported Fixed Dentures
Author: Ferreira M.B.
Barao V.A.
Delben J.A.
Faverani L.P.
Hipolito A.C.
Assuncao W.G.
Abstract: Despite the necessity for faster clinical protocols for immediate loading of implant-supported dentures, there is a lack of biomechanical studies to confirm the rigid splinting effectiveness. We compared the stress in mandibular full-arch implant-supported fixed dentures under immediate loading through three-dimensional finite element analysis. Edentulous human mandible models were restored with a 4-implant fixed denture. Implants were splinted with a metallic framework and submitted to conventional loading (group A - control), with acrylic resin and submitted to immediate loading (group B), with a metallic framework and submitted to immediate loading (group C), and with acrylic resin and a prefabricated distal bar and submitted to immediate loading (group D). Models were supported by masticatory muscles. A 100-N oblique load was applied on the first molar. Group A presented the lowest stress and implant displacement values, whereas group D showed the highest values. In bone, groups under immediate loading exhibited the highest stress, whereas the group experiencing conventional loading showed an approximately 50% reduction. All groups submitted to immediate loading presented similar stress values in peri-implant bone. The loading protocol influenced the stress and implant displacement, but the design of the fixed denture did not affect the stress in the peri-implant bone. Rigid splinting of implants submitted to immediate loading is not essential for treatment success. © 2014 Elsevier B.V.
Rights: fechado
Identifier DOI: 10.1016/j.msec.2014.02.021
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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