Clinical Evaluation of Photobiomodulated Hyaluronic Acid Therapy for Interdental Papillary Loss: Minimal Invasive Blind Split Mouth Technique

This arm includes the test sites (e.g., left maxillary quadrant) in each participant. The same dose of hyaluronic acid (0.2 mL of 0.8% gel) will be injected in the same manner as in the control group. However, photobiomodulation therapy (PBMT) using a diode laser (wavelength 630-670 nm, 25 mW, 1.875 J/cm² for 20 seconds) will be applied before and after the injection. Laser application will be repeated at every follow-up appointment to promote tissue healing, angiogenesis, and papillary regeneration.

This arm includes the control sites (e.g., right maxillary quadrant) in each participant. The interdental papilla with Class I deficiency will be treated using 0.2 mL of 0.8% commercial hyaluronic acid gel, injected 2-3 mm apical to the papilla tip. This is a commonly used non-surgical soft tissue filler in periodontal and esthetic procedures. No photobiomodulation therapy will be applied in this arm.