There are many reasons a black dental triangle can appear. Usually it is because the bottom of the tooth is wider than the top of the tooth, forming a triangle which appears because the gum has shrunk away. Black triangles between teeth form when the papilla (gum tissue between the teeth) recedes or does not form. This can be because of tooth shape, trauma or even gum disease. This patient came in wanting veneers placed on her teeth. A less invasive conservative option was discussed and recommended to this patient. A technique called BioClear was used.