Abutment-to-fixture load transfer and peri-implant bone stress

To uncover design principles for the abutment-fixture complex that reduce the stress concentration on the bone. A 3-dimensional finite element model was used to vary shape, elasticity, and connectivity of the abutment-fixture complex. We compared peri-implant bone stress of these designs. Peri-impla...

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Bibliographic Details
Published inAmerican journal of dentistry Vol. 28; no. 5; p. 247
Main Authors Van Oers, René F M, Feilzer, Albert J
Format Journal Article
LanguageEnglish
Published United States 01.10.2015
Subjects
Alveolar Process - physiopathology
Biomechanical Phenomena
Dental Abutments
Dental Implant-Abutment Design
Dental Implants
Dental Marginal Adaptation
Elastic Modulus
Elasticity
Finite Element Analysis
Humans
Imaging, Three-Dimensional - methods
Models, Biological
Osseointegration - physiology
Stress, Mechanical
Surface Properties
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Summary:To uncover design principles for the abutment-fixture complex that reduce the stress concentration on the bone. A 3-dimensional finite element model was used to vary shape, elasticity, and connectivity of the abutment-fixture complex. We compared peri-implant bone stress of these designs. Peri-implant bone stress was increased when the abutment could slide frictionless along the rim of the fixture, allowing the abutment to "lean into" the fixture rim and transfer loads near the bone crest. Conversely, bone stress was reduced when no motion was allowed (or no contact was made at all) between the abutment and the fixture rim. Bone stress was also reduced when the fixture was stiffer and thus more resistant to deformation, or when the fixture was wider.
ISSN:0894-8275