Effect of dowel design on stress distribution in roots and root supporting tissues as measured by computerized finite element analysis
Date
1984
DOI
Authors
Al-Amer, Abdulla A
Al-Rasheed, Anisa M
Version
OA Version
Citation
Abstract
An important step in restorative dentistry in recent years has been the utilization of the Finite Element Method where it was used in the industrial fields, to analyze stresses created by dental restorations on dental tissues.
In this study, different variables such as dowel length, the height of the alveolar bone, and the presence of a crown were tested to determine their influence on stress distribution on dental and supporting tissues.
Utilizing the ANSYS finite element program, a mesio-distal cross- sectional model resembling an upper second bicuspid with surrounding bone and periodontal ligaments was developed. The model was restored with variable dowel lengths (3 mm, 5 mm, 7 mm, and 9 mm). The surrounding bone height was also varied from normal height down to 6 mm bone loss. The effect of a crown on stress distribution was compared to those dowels without a crown. The tooth model was loaded with 40 lbs. in a direction parallel to the long axis of the tooth and again in a 45[degree] angle to the long axis.
Short dowels generated the highest magnitudes of stress at each bone level and with both loadings. Reduction of the alveolar bone height increased stress magnitudes and concentrations in root and dowels, especially with short dowels at both loadings. The presence of a crown with a lateral loading increased stress magnitudes considerably compared to dowel without crown.
Description
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Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1984, (Prosthodontics, and Operative)
Bibliography: leaves 74-84.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1984, (Prosthodontics, and Operative)
Bibliography: leaves 74-84.
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This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.