Comparative Stress Distribution of Implant-Retained Mandibular Ball-Supported and Bar-Supported Overlay Dentures: A Finite Element Analysis.
Summary of "Comparative Stress Distribution of Implant-Retained Mandibular Ball-Supported and Bar-Supported Overlay Dentures: A Finite Element Analysis."
Abstract Background: Implant-retained mandibular ball-supported and bar-supported overlay dentures are the two most common treatment options for the edentulous mandible. The superior option in terms of strain distribution should be determined. Methods: The three-dimensional (3D) model of mandible (based on CT scan) and its overlying implant-retained bar-supported and ball-supported overlay dentures were simulated using SolidWorks, NURBS and ANSYS Workbench. Loads A (60N) and B (60N) were exerted, respectively in protrusive and laterotrusive motions, on 2nd molar mesial, 1st molar mesial and 1st premolar. The strain distribution patterns were assessed on 1) implant-tissue, 2) first implant-bone and 3) second implant-bone interfaces.Results: Protrusive: Strain was mostly detected in the apical of the fixtures and least in the cervical when bar design was used. The strain was mostly detected in the cervical of the working side implant. In non-working side, however, strain was higher in the cervical and lower in the apical compared to the working side implant. Laterotrusive: The strain values were closely similar in the two designs.Conclusion: It seems that both designs are acceptable in terms of stress distribution although a superior pattern is associated with the application of bar design in protrusive motion.
Hamadan University of Medical Sciences (UHSHA), Hamadan, Iran., Tehran, n/a, Iran, Islamic Republic of.
This article was published in the following journal.
Name: The Journal of oral implantology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20712443
- DOI: http://dx.doi.org/10.1563/AAID-JOI-D-10-00057
Medical and Biotech [MESH] Definitions
Denture, Complete, Lower
A complete denture replacing all the natural mandibular teeth and associated structures. It is completely supported by the oral tissue and underlying mandibular bone.
A denture replacing one or more (but not all) natural teeth. It is supported and retained by underlying tissue and some or all of the remaining teeth.
Dental Prosthesis, Implant-supported
A prosthesis that gains its support, stability, and retention from a substructure that is implanted under the soft tissues of the basal seat of the device and is in contact with bone. (From Boucher's Clinical Dental Terminology, 4th ed)
A game in which a round inflated ball is advanced by kicking or propelling with any part of the body except the hands or arms. The object of the game is to place the ball in opposite goals.
Dental Implantation, Endosseous
Insertion of an implant into the bone of the mandible or maxilla. The implant has an exposed head which protrudes through the mucosa and is a prosthodontic abutment.
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