Theory

the depression in the gingival tissue under a contact area between the lingual papilla and the facial papilla

v shaped spillway space next to the contact area of adjacent teeth narrowest at the contact and widening towards the facial, lingual and occlusal contacts

a cleft in the gingival margin usually at a mesial or distal line angle of a tooth where dental floss was repeatedly applied incorrectly. The lining of the cleft can be completely lined with epithelium

unintentional incision at the gingival margin due to incorrect positioning and placement of dental floss

the triangular region bounded by the proximal surfaces of contacting teeth and the alveolar bone between the teeth which forms the base of the triangle; the space is normally filled with the interdental papilla also called the interdental area

outer protective surface of stratified squamous epithelium; covers the masticatory mucosa; interdental col area is not normally ________

another name for an interdental brush