Abstract
Although a surgical treatment and/or medication have been frequently used when a perio-derived fistula developed, it is desirable to minimize these treatments as far as possible. Under the guidance of dentist so as not to exceed the range of dental hygienic work, therefore, we recently performed a close examination on the site of fistula by inserting a plastic probe from the accused fistula and its periodontal pocket without anesthesia. Through this examination, the existence of a zone where the two points are coincided with each other, that is, PF (Pocket Fistula) zone, was revealed.
After the plastic probing was performed from the fistula and its periodontal pocket, a modified ready-made instrument was further inserted into the PF zone followed by scaling, root debridement and irrigation. As a result, the perio-derived fistula could be easily restored with the subsequent bone reproduction without missing the accused tooth. From these evidences mentioned above, the clinical efficacy of PF zone method on perio-derived fistula was confirmed. In this PF zone method, a use of plastic probe plays the most important role.
