what relationship does tooth size have on the mass of the interdental papilla
Interdental papilla A missing papilla is often visible as a small triangular gap between adjacent teeth. The relationship of interdental bone to the interproximal contact point between adjacent teeth is a determining factor in whether the interdental papilla will be present. If greater than 8mm exist between the interdental bone and the interproximal contact, usually no papilla will be present. If the distance is 5mm or less, than a papilla will almost always be present.
Philtrum The philtrum (Latin: philtrum, Greek: φίλτρον philtron, lit. "love charm"[2]), or medial cleft, is a vertical indentation in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip. Together with a glandular rhinarium and slit-like nostrils, it is believed[by whom?] to constitute the primitive condition for at least therian mammals. Monotremes lack a philtrum, though this could be due to the specialised, beak-like jaws in living species.[3]