Abstract
The application of an ultrasonic device for endodontic therapy is expected to exhibit not only the filing effects but also a cleansing effect in the root canal. However there has been little detailed research to evaluate the clinical effects regard in deciduous teeth. The purpose of this study was to evaluate the clinical effect on cleansing root canals of deciduous teeth by the use of an ultrasonic device.
The subjects of this study consisted of 27 children (15 boys and 12 girls), who had 33 deciduous molars having infected root canals with gingival abscesses.
The results obtained were as follows:
1. The number of treatments was up to 3 times from the beginning of the root canal treatment to the root canal filling.
2. The teeth with recurred gingival abscesses showed negative during the observation period within one year of up to one year.
3. It was observed in a few cases that there might be some possibility of destroying the root apex at the time of canal preparation or ultrasonic irrigation. However there was no abnormality in the root resorption radiographically over a long term.
4. The pathological bone resorption that localized at the area from the bifurcation or trifurcation to the root apex was repaired radiographically after the root canal filling.
