Comparison of Single-Standing or Connected Implants on Stress Distribution in Bone of Mandibular Overdentures: A Two-Dimensional Finite Element Analysis
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Data
2010-05-01
Autores
Tabata, Lucas Fernando [UNESP]
Assunção, Wirley Goncalves [UNESP]
Ricardo Barao, Valentim Adelino [UNESP]
Gomes, Erica Alves [UNESP]
Delben, Juliana Aparecida [UNESP]
Sousa, Edson Antonio Capello [UNESP]
Rocha, Eduardo Passos [UNESP]
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Editor
Lippincott Williams & Wilkins
Resumo
This study aimed to compare the influence of single-standing or connected implants on stress distribution in bone of mandibular overdentures by means of two-dimensional finite element analysis. Two finite element models were designed using software (ANSYS) for 2 situations: bar-clip (BC) group-model of an edentulous mandible supporting an overdenture over 2 connected implants with BC system, and o'ring (OR) group-model of an edentulous mandible supporting an overdenture over 2 single-standing implants with OR abutments. Axial loads (100 N) were applied on either central (L1) or lateral (L2) regions of the models. Stress distribution was concentrated mostly in the cortical bone surrounding the implants. When comparing the groups, BC (L1, 52.0 MPa and L2, 74.2 MPa) showed lower first principal stress values on supporting tissue than OR (L1, 78.4 MPa and L2, 76.7 MPa). Connected implants with BC attachment were more favorable on stress distribution over peri-implant-supporting tissue for both loading conditions.
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Finite element analysis, biomechanics, stress distribution, dental implant, attachment system, overdenture
Como citar
Journal of Craniofacial Surgery. Philadelphia: Lippincott Williams & Wilkins, v. 21, n. 3, p. 696-702, 2010.