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Purpose: This study evaluated stress distribution in metal frameworks constructed on
implants under masticatory forces using computer simulations. Materials and Methods:
Three-dimensional finite element analysis was used to study four different veneering
materials–metal framework combinations using Calcitek implants. The veneering
materials used in the study were porcelain, heat-polymerized poly(methyl methacrylate)
resin, microfilled composite resin, and glass-modified composite resin. All computations
were conducted for different levels on the buccal and lingual sides. Results: Changing the
veneering material on the prosthesis produced significant effects on stress levels and
stress distribution on the metal frameworks. Stresses were concentrated along the
marginal area of the prosthesis. Acrylic resin showed greater displacement than
porcelain, probably because of its lower modulus of elasticity. Conclusion: In comparison
to porcelain, more stress is borne by the acrylic resin–veneered metal framework under
static loading.
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