Effect of cantilever length and alloy framework on the stress distribution in peri-implant area of cantilevered implant-supported fixed partial dentures

Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area...

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Bibliographic Details
Published in:Journal of applied oral science 2016-04, Vol.24 (2), p.114-120
Main Authors: Suedam, Valdey, Moretti Neto, Rafael Tobias, Sousa, Edson Antonio Capello, Rubo, José Henrique
Format: Article
Language:English
Subjects:
Analysis of Variance
Chromium Alloys - chemistry
Compressive Strength
Dental Alloys - chemistry
Dental implants
Dental Prosthesis Design
Dental Prosthesis, Implant-Supported - methods
Dental Stress Analysis
Dentistry
DENTISTRY, ORAL SURGERY & MEDICINE
Denture, Partial, Fixed
Elastic Modulus
Implant-supported dental prosthesis
In vitro techniques
Materials Testing
Mechanical stress
Original
Palladium - chemistry
Reference Values
Reproducibility of Results
Silver - chemistry
Stress, Mechanical
Torque
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Summary:Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area of cantilevered implant-supported fixed partial dentures and the potential effects of such variable. Material and Methods A U-shaped polyurethane model simulating the mandibular bone containing two implants (Ø 3.75 mm) was used. Six groups were formed according to the alloy's framework (CoCr or PdAg) and the point of load application (5 mm, 10 mm and 15 mm of cantilever arm). A 300 N load was applied in pre-determined reference points. The tension generated on the mesial, lingual, distal and buccal sides of the peri-implant regions was assessed using strain gauges. Results Two-way ANOVA and Tukey statistical tests were applied showing significant differences (p
ISSN:1678-7757
1678-7765
1678-7765
1678-7757
DOI:10.1590/1678-775720150297