Bone loss is extensive. Furcation exposure comes from bone loss at the furcation of multirooted teeth. Furcation exposure may occur before advanced periodontal disease. It is sometimes difficult to determine radiographically, whether the interradicular space is involved, unless there is a radiolucent area in the region of the furcation. Only advanced furcation exposures where both cortical plates are gone will be easily recognized on radiographs.
Bone still fills most of the area where the roots meet.
The alveolar bone has eroded to a point that the explorer probe passes through the defect unobstructed. Alveolar dehiscence exists when the alveolar cortical bone is resorbed along the entire length of the root. Radiographically, there will be a radiolucency surrounding the effected root. No portion of this site may be copied without authorization. If you have any questions about the site, or are referencing it in an article or other website, please notify the webmaster .