Interdental papilla

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Photograph of the upper right quandrant, showing teeth #4-8, with a DO amalgam on #5.  The triangles of gingiva (encirled in blue) that exist between the teeth are the interdental papillae.
Photograph of the upper right quandrant, showing teeth #4-8, with a DO amalgam on #5. The triangles of gingiva (encirled in blue) that exist between the teeth are the interdental papillae.

The interdental papilla, also known as the gingival papilla, is that part of the gingiva that exists coronal to the free gingival margin on the buccal and lingual surfaces of the teeth.