Abstract
Assessment of alveolar bony change during periodontal treatment is clinically important. Especially, the change in the crestal portion of alveolar bone which generally appears in X-P films. This approach, however, has several limits in that the change is examined on the film photographed.
In order to examine the alveolar bony change directly without using X-P films in patients with periodontitis, we tried to determine precisely the minute bony change by analyzing 30 keV-γ-rays (133Ba) permeating the crestal portion of alveolar bone in 120 seconds.
The results revealed that the first remarkable bony change was observed following instrumentation and that its time-course occurred 2-7 months after the start of treatment.
