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KMID : 0362720140520120734
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Journal of the Korean Dental Association
2014 Volume.52 No. 12 p.734 ~ p.743
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Vibration characteristics of endodontic motors with different motion: reciprocation and conventional rotation
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Jeon Yeong-Ju
Kim Jin-Woo
Cho Kyung-Mo
Park Se-Hee
Chang Hoon-Sang
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Abstract
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Objectives: By introduced reciprocation motion file in dentistry, dentists benefit simple canal shaping procedure and timesaving. But, reciprocation motion generates uncomfortable vibration to doctors and patients. Because there was no study about this consideration, this study compared vibration pattern and power generated from reciprocation motion motor and conventional rotary motor.
Materials & Methods: One conventional rotary motor; X-Smart (Dentsply Maillefer, Ballaigues, Switzerland); and two reciprocating motors; WaveOne Motor (Dentsply Maillefer, Ballaigues, Switzerland) and X-SMART PLUS (Dentsply Maillefer, Ballaigues, Switzerland); were used in this study. Triaxial ICP Accelerometer (Model 356A12, PCB piezotronics, New York, USA) was attached on motor’s handpiece head, and was measured tri-axial vibratory acceleration with NI Sound and Vibration Assistant 2009 software (National Instruments, Texas, USA). Mean vibratory acceleration and maximum vibratory acceleration was measured on fixed position and handed position. The results of vibratory acceleration were statistically analyzed using ANOVA and multiple comparisons are made using Turkey’s test at p<0.05 level.
Results: Reciprocating motors showed higher mean vibratory acceleration and maximum vibratory acceleration than conventional rotary motor (p<0.05). Between reciprocating motors, X-SMART PLUS had lower mean vibratory acceleration and maximum vibratory acceleration than WaveOne Motor (p<0.05).
Conclusion: Reciprocating motors generate more vibration than conventional rotary motor. Further study about effect of vibration to dentist and patient is needed. And it seems to be necessary to make a standard about vibration level in endodontic motors.
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KEYWORD
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Endodontic motor vibration, Reciprocation, Triaxial accelerometer, WaveOne, Reciproc, X-Smart, WaveOne Motor, X-SMART PLUS
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