Orthodontic and Periodontal Materials · CDA

Which periodontal material acts as a barrier to prevent epithelial tissue from growing into healing bone defects?

  1. Surgical periodontal dressing
  2. Guided tissue regeneration membrane
  3. Glass ionomer cavity liner
  4. Topical fluoride varnish
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Correct answer: Guided tissue regeneration membrane

GTR membranes are used to support regeneration by blocking epithelial migration. This allows bone and ligament cells to repopulate the area.

Difficulty: Medium Question 16 of 20

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