The interdental papilla is extremely important for an esthetic smile. Black triangles. also known as gingival embrasures. are defined as the embrasures cervical to the interproximal contact that is not filled by the gingival tissue architecture of periodontal protection. https://www.bekindtopets.com/mega-pick-Silbrade-Braid-Reinforced-Silicone-Tubing-1-4-ID-x-520-OD-x-1-hot-grab/