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[Effect of ultrasonic in instrumentation on curved and obstructed root canal preparation]
Xiao-Feng Li1, Qiu-Ping Fang, Wei-Qian Wang
1Hangzhou Stomatological Hospital, Hangzhou 310006, Zhejiang Province, China. hxqlxf@hzcnc.com
Purpose:
To investigate and evaluate the effect of ultrasonic instrumentation on curved and obstructed root canal preparation.
Methods:
Ultrasonic preparation was used on 117 root canals of 92 teeth due to resinifying therapy, pulp mummification and aging which could not be reopened and treated with traditional methods.
Results:
108 canals were successfully reopened with a successful rate of 92.3%. Failure occurred in 9 cases. 2 of them were lateral perforation. 2 were obstructed on curving position. 2 of them were due to pulp calcification in older patients. 3 were failing after resinifying therapy.
Conclusion:
The ultrasonic treatment of root canal was an effective and safe method. It was still limited in a cases with pulp calcification and some fine root canals treated by resinifying therapy.
