Purpose: The purpose of this study was to photoelastically compare the stresses generated by loads on primary canines with facial restorations of different stiffness.
Methods: Composite photoelastic models of a typical maxillary primary canine were fabricated using individual simulant materials for enamel, dentin, periodontal ligament, and alveolar bone. Models were made with identical facial preparations included either near the cementoenamel junction or at 2 mm incisally.