Three-Dimensional Finite Element Analysis of Varying Diameter and Connection Type in Implants with High Crown-Implant Ratio

Autor(es)

Sandra Lúcia Dantas de Moraes ^[1] ; Fellippo Ramos Verri ^[2] ; Joel Ferreira Santiago Júnior ^[3] ; Daniel Augusto de Faria Almeida ^[4] ; Cleidiel Aparecido Araujo Lemos ^[5] ; Jéssica Marcela de Luna Gomes ^[6] ; Eduardo Piza Pellizzer ^[7]

Afiliação do(s) autor(es)

^[1] Universidade de Pernambuco. Dental School of Pernambuco - Brasil

^[2] Universidade Estadual Paulista. Araçatuba Dental School. Department of Dental Materials and Prosthodontics - Brasil

^[3] Universidade do Sagrado Coração. Pró-Reitoria de Pesquisa e Pós-graduação - Brasil

^[4] Universidade Federal de Alfenas. Dental School. Department of Operative Dentistry - Brasil

^[5] Universidade Estadual Paulista. Araçatuba Dental School. Department of Dental Materials and Prosthodontics - Brasil

^[6] Universidade Estadual Paulista. Araçatuba Dental School. Department of Dental Materials and Prosthodontics - Brasil

^[7] Universidade Estadual Paulista. Araçatuba Dental School. Department of Dental Materials and Prosthodontics - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Dental Journal; v. 29, n. 1, p. 36-42, 2018-02-00.

Resumo

Abstract The aim of this study was to evaluate the effect of varying the diameter, connection type and loading on stress distribution in the cortical bone for implants with a high crown-implant ratio. Six 3D models were simulated with the InVesalius, Rhinoceros 3D 4.0 and SolidWorks 2011 software programs. Models were composed of bone from the posterior mandibular region; they included an implant of 8.5 mm length, diameter Ø 3.75 mm or Ø 5.00 mm and connection types such as external hexagon (EH), internal hexagon (IH) and Morse taper (MT). Models were processed using the Femap 11.2 and NeiNastran 11.0 programs and by using an axial force of 200 N and oblique force of 100 N. Results were recorded in terms of the maximum principal stress. Oblique loading showed high stress in the cortical bone compared to that shown by axial loading. The results showed that implants with a wide diameter showed more favorable stress distribution in the cortical bone region than regular diameter, regardless of the connection type. Morse taper implants showed better stress distribution compared to other connection types, especially in the oblique loading. Thus, oblique loading showed higher stress concentration in cortical bone tissue when compared with axial loading. Wide diameter implant was favorable for improved stress distribution in the cortical bone region, while Morse taper implants showed lower stress concentration than other connections. (AU)

• Processo FAPESP: 09/16164-7 - Influência da proporço coroa/implante, do tipo de conexo protética e dos diferentes diâmetros do implante na distribuiço das tensões, em restaurações unitárias implantossuportadas: estudo pelo método dos elementos finitos tridimensionais
• Beneficiário: Eduardo Piza Pellizzer
• Modalidade de apoio: Auxílio à Pesquisa - Regular