Clinical Evaluation of Different Treatments for Interdental Black Triangles

Recruiting now · Not applicable

Conditions studied: Black Triangles Syndrome (BTS), Papilla Reconstruction

In brief

This randomized clinical trial aims to evaluate and compare the effectiveness of surgical and nonsurgical treatment approaches for the management of interdental black triangles. Black triangles are open gingival embrasures caused by the loss or deficiency of the interdental papilla between adjacent teeth. These spaces are a common esthetic concern and may also contribute to food impaction and periodontal problems. Thirty adult patients presenting with interdental papillary loss classified as Nordland and Tarnow Class I or II will be recruited from the outpatient clinics of the Faculty of Dentistry at King Salman International University. Eligible participants will be randomly assigned to one of three treatment groups: surgical reconstruction using the tube grafting technique, papillary augmentation using hyaluronic acid injection, or a restorative approach using the injection molding composite technique. Clinical and photographic assessments will be performed at baseline and during follow-up visits at 3 and 6 months after treatment. The primary outcomes will be the reduction in black triangle surface area and height. Secondary outcomes will include clinical periodontal parameters such as plaque index, bleeding score, probing pocket depth, and clinical attachment level. Patient satisfaction with the esthetic outcome will also be evaluated using a Visual Analog Scale (VAS). The findings of this study are expected to provide evidence regarding the comparative effectiveness of surgical and nonsurgical approaches for the management of interdental black triangles and help clinicians select the most predictable treatment modality for improving esthetic outcomes.

Key facts

Study ID

NCT07548203

Run by

Ain Shams University

People needed

30

Starts

2026-04-22

Expected to finish

2026-10-15

Last updated by the study team

2026-04-23

Who can join

Age: 18 and older, up to 50. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Adults aged 18 to 50 years.
• Presence of interdental black triangle classified as Nordland and Tarnow Class I or Class II.
• Radiographic evidence of adequate interdental bone support, defined as ≤5 mm distance from the contact point to the alveolar crest.
• Systemically healthy individuals with no medical conditions affecting wound healing.
• Patients willing to participate in the study and attend follow-up visits at 3 and 6 months.

You may not qualify if…

• Patients with systemic diseases that may impair wound healing.
• Presence of teeth with acute periapical pathology.
• Presence of periodontal pockets or active periodontal disease.
• Pregnant or lactating women.
• Patients with parafunctional habits (e.g., bruxism).
• Smokers, alcoholics, or drug abusers.

Where it is running

• Faculty of Dentistry, King Salman International University — Cairo, Egypt (enrolling)

Full record on ClinicalTrials.gov

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