CLASS V COMPOSITE PLACEMENT METHODS AND CAVITY DESIGNS

Project: Research project

Description

The immediate goal of this pilot project is to develop tools for the
engineering analysis and design of composite restorations. The ultimate
goal is to improve placement techniques and cavity designs in order to
increase restoration longevity while conserving healthy tooth structure
and minimizing iatrogenic complications. The focus is on clinical problems
(open margins, tooth sensitivity, recurrent decay, discoloration, etc.)
associated with stresses developed during the polymerization shrinkage of
composite resins. The approach in this study is to analyze placement
techniques and cavity designs with the application of a state-of-the-art
stress calculation tool (Finite Element Method, FEM). The FEM will be used
to calculate the stresses developed during the placement of self- and
light-cured Class V composite restorations. The specific aims include the following. FEM methods must be developed to
model the polymerization process and the associated shrinkage. The
algorithm will take into account the crucially dissimilar behaviors of
self- vs. light-cure materials. Those models will then be used to compare
the stresses that are developed with different placement techniques into
different cavity designs. Then, placement methods and cavity preparation
design changes will be investigated for minimization of stress build-up.
Finally, based on the numerically developed information, laboratory tests
will be performed to validate the FE model.
StatusFinished
Effective start/end date9/30/946/30/98

Funding

  • National Institutes of Health
  • National Institutes of Health: $43,308.00

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Restoration
Composite materials
Finite element method
Polymerization
Discoloration
Resins

ASJC

  • Medicine(all)
  • Dentistry(all)