DOI: 10.36347/sjds.2019.v06i03.010

Pages: 129-138

Background: Gingival retraction is an inevitable step in fabrication of fixed partial denture. With the evolution in the cordless retraction materials like Magic foam and Expasyl, the selection of among these materials has still been a dilemma as there are no specific criteria on selection among this material in literature. The purpose of this study was to compare and evaluate the quantitative gingival displacement among cordless and conventional cord gingival retraction techniques in thin and thick gingival biotype. Methods: A total of 20 heathy participants with 10 participants each in thin and thick gingival biotype category on the right central incisor were selected. Under standard protocol and manufactures instruction gingival retraction followed by impression were carried out using 5% aluminium chloride impregnated retraction cord, Magic foam and Expasyl. Through the cast obtained a 3mm samples were prepared and observed under digital binocular compound microscope at 40x magnification which was affixed to a computer with the Image Analyser Multimedia software-Motic Image Plus 2.0ML which would detect the edges and generate the results of quantitative displacement in vertical, horizontal and area of displacement. Results: In relation to the thin gingival biotype the maximum vertical displacement was observed in magic foam followed by Retraction Cord and Expasyl, whereas the maximum lateral displacement was observed by Retraction cord followed by Magic Foam and Expasyl. In thick gingival biotype the maximum vertical displacement was observed in Retraction Cord followed by Magic Foam and Expasyl, whereas the maximum lateral displacement was observed by Retraction cord followed by Expasyl and Magic Foam. The overall total area of displacement for both the thin and thick gingival biotype was observed by Retraction Cord followed by Magic Foam and Expasyl. Conclusion: The conventional retraction cord still stands to deliver the overall maximum amount of displacement