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The collagen plug is kept in place by fabricating an immediate provisional (Fig.6 P). While the latter is setting, effort is exerted to push the acrylic apically (arrowheads) to cover the gingival defect and laterally into the undercut of the neighboring teeth to obtain retention of the provisional (*). Therefore the provisional is locked in place. No cement or periodontal dressing is needed.
Xin Wei, DDS, PhD, MS 1st edition 01/05/2016, last revision 12/25/2018