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Twin block-gerard

  • These are functional appliances designed to enhance forward mandibular growth in the treatment of distal occlusion by encouraging a functional displacement of mandibular condyles downards and forwards in the glenoid fossa.
  • Repositioning creates a positive proprioceptive response in the muscles of mastication.
  • This is  fundamental functional mechanism of habitual dentition
  • occlusal forces transmitted through the dentition provide a constant stimulus to influence the rate of growth and trabacular structure of supporting bone
  • this sensory feed back  mechanism controls muscular activity and provides a  functional stimulus or deterrent to mandibular bone growth.

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