Pre-surgical preparation
PLAQUE
Preoperatively, all patients underwent a thorough professional mechanical plaque removal (PMPR), with oral hygiene instructions. After the completion of nonsurgical phase I therapy, patients were recalled after four weeks for tissue re-evaluation. Patients with a full mouth O’Leary plaque index of less than or equal to 10% and a full mouth Gingival Index of zero were eligible to participate in the surgical procedure [Primary impression was taken for test group patients by alginate material (Zhermack Alginate Hydrogum 5 Impression material) to fabricate the transparent tissue guard appliance.