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Reduction of excessive electrical stimulus during electric pulp testing

Authors
 K. C. Nam  ;  S. H. Ahn  ;  J. H. Cho  ;  D. W. Kim  ;  S. J. Lee 
Citation
 INTERNATIONAL ENDODONTIC JOURNAL, Vol.38(8) : 544-549, 2005 
Journal Title
INTERNATIONAL ENDODONTIC JOURNAL
ISSN
 0143-2885 
Issue Date
2005
MeSH
Adult ; Bicuspid/physiology ; Dental Pulp Test/instrumentation* ; Dental Pulp Test/methods ; Electric Stimulation* ; Electromyography ; Equipment Design ; Female ; Fingers/physiology ; Humans ; Incisor/physiology ; Male ; Movement ; Neck Muscles/physiology ; Reaction Time/physiology ; Sex Factors ; Time Factors ; Voice/physiology
Keywords
automatic circuit breaker ; electric pulptest ; electromyography ; excessive stimulus time
Abstract
AIM: To measure excessive electrical stimulus time during pulp testing via electromyography (EMG) in the anterior belly of the digastric muscle, voice and finger movement, and to determine whether excessive stimulus time could be attenuated by a specially designed automatic circuit breaker on the basis of the EMG signal.
METHODOLOGY: The signals from three human responses (EMG, finger and voice), induced by the Digitest (Parkell Inc., Farmingdale, NY, USA) electric pulp tester, were captured using a MP100 (Biopac System Inc., Goleta, CA, USA) and recorded into a personal computer. The excessive stimulus time from activation to the end of electrical stimulation was calculated for each of these three responses. The automatic circuit breaker was designed to disconnect the electrical output of the electric pulp testing (EPT) unit immediately after detecting the preset EMG level (100 mV). Each of the right central incisors and first premolars of 23 healthy individuals (16 males and seven females) was tested to see whether there was a difference in tooth type or gender. This was analysed by Wilcoxon signed rank test (nonparametric paired t-test) and Mann-Whitney test (nonparametric independent t-test), respectively.
RESULTS: Amongst three human responses, the electrical onset occurred in the order of EMG, finger and voice. Excessive stimulus time was 347.8 +/- 78.3 ms when observed by the EMG, 264.9 +/- 63.9 ms when observed by finger span and 229.4 +/- 41.8 ms when observed by the voice, which were all found to be significantly different (P < 0.05). When the automatic circuit breaker was used, the excessive stimulus time was 61.0 ms, which was 286.8 ms shorter than that measured from EMG onset when using the conventional EPT.
CONCLUSIONS: When the automatic circuit breaker was used, excessive stimulus time on the basis of EMG was attenuated on average by 286.8 ms.
Full Text
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2591.2005.00985.x/abstract
DOI
10.1111/j.1365-2591.2005.00985.x
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Deok Won(김덕원)
Nam, Ki Chang(남기창)
Ahn, Seon Hui(안선희)
Lee, Seung Jong(이승종)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/147596
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