Evaluation of cutting efficiency of ultrasonic tips used in orthograde endodontic treatment.
The purpose of the present study was to evaluate the cutting efficiency of the three different ultrasonic tips for orthograde endodontic treatment: stainless steel, zirconium nitride-coated, and diamond-coated tips. An ultrasonic handpiece was mounted on a custom-made automated balance, and each tip repeatedly penetrated dental stone blocks to a depth of 3 mm for 10 times. The amount of time taken to penetrate 3 mm of stone was measured. The diamond-coated tips showed significantly greater cutting efficiency than either stainless steel tips or zirconium-nitride coated tips. The stainless steel tips showed initial better cutting efficiency, but over time , there is no significant difference between the cutting efficiency of the stainless steel tips and the zirconium nitride coated tips. The diamond coated tips were the only group that showed breakage in this study.
Department of Endodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio 44106-4905, USA.
Yu-Heng
YH
Lin
André K
AK
Mickel
Jefferson J
JJ
Jones
Thomas A
TA
Montagnese
Alvaro F
AF
González
D002133:Calcium Sulfate; D020099:Coated Materials, Biocompatible; D003762:Dental Instruments; D003799:Dental Stress Analysis; D018130:Diamond; D004867:Equipment Design; D004868:Equipment Failure; D008422:Materials Testing; D018915:Root Canal Preparation / Q000295:instrumentation*; D013193:Stainless Steel; D014464:Ultrasonic Therapy / Q000295:instrumentation; D015040:Zirconium
D020099:Coated Materials, Biocompatible; D013193:Stainless Steel; D018130:Diamond; D015040:Zirconium; D002133:Calcium Sulfate