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Objectives: In spite of extensive research and progress over the past few decades in prosthetic dentistry, a common objective for impressions of interim crowns or fixed dental prostheses is to register the prepared abutments and finish lines accurately. For all impression procedures, the gingival tissue must be displaced to allow the subgingival finish lines to be registered. Retraction is the temporary displacement of the gingival tissue away from the prepared teeth. Different techniques are mentioned in literature for this purpose. Materials and Methods: in this article four techniques are discussed namely retraction cord , Diode LASER, Electrosurgery and Expasyl retraction system to evaluate and compare with time 1) Patient’s comfort after gingival retraction/displacement. (2) Gingival health. Results and Conclusion: The results indicated that gingival retraction by Expasyl retraction system is better than the other two in term of patient comfort, gingival recession (0.04 mm 14 days after retraction), and gingival health. Trauma to gingival tissue was minimal and gingival tissue returned to normal condition within 24 hours.
Rosane Cavalcante Fragoso, Brasil
Chief Scientific Officer and Head of a Research Group
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