Figure 3: Bergland scale: The amount of bone produced in the cleft site was evaluated based on the height of the intraalveolar septum (bone bridge).
Heights are measured from the apical extent of the cleft site (a line between the tips of the roots of the adjacent teeth) to the cementoenamel junction coronally. Type 1 is defined as normal height (more than 75% of the normal bone height). Type 2 is defined as less than normal height (50–75% of normal bone height). Type 3 has less than 50% of normal bone height. Type 4 has no bone bridge in the cleft site.