Geneva, May 4 -- International Clinical Trials Registry received information related to the study (ChiCTR2600123161) titled 'A Randomized Controlled Trial Comparing Video-based versus Face-to-face Oral Hygiene Instruction on Plaque Control in Dental Outpatients with Periodontitis' on April 22.

Study Type: Interventional study

Study Design: Parallel

Primary Sponsor: Shenzhen Stomatology Hospital

Condition: Periodontitis

Intervention: Experimental group (A1: Modified Bass technique):Participants watch a 5-minute standardized brushing instruction video via QR code scan in the waiting area (A1: Modified Bass technique), then receive a standardized oral hygiene kit (toothbrush, 1450 ppm fluoride toothpaste). Control group (B1: Modified...