Table 1.

Classification system by Nordland and Tarnow [35].

Classification	Description
Class I	The tip of the interdental papilla lies between the interdental contact point and the most coronal extent of the cemento-enamel junction (CEJ) (space present but interproximal CEJ is not visible).
Class II	The tip of the interdental papilla lies at or apical to the interdental CEJ, but coronal to the apical extent of the facial CEJ (interapproximal visible).
Class III	The tip of the interdental papilla lies level with or apical to the facial CEJ.