Preference of undergraduate students after first experience on nickel-titanium endodontic instruments
곽상원, Cheung Gary Shun-Pan, 하정홍, 김성교, 이효진, 김현철,
소속 상세정보
곽상원 ( Kwak Sang-Won ) - Pusan National University School of Dentistry Department of Conservative Dentistry
( Cheung Gary Shun-Pan ) - University of Hong Kong Faculty of Dentistry Prince Philip Dental Hospital Area of Endodontics
하정홍 ( Ha Jung-Hong ) - Kyungpook National University School of Dentistry Department of Conservative Dentistry
김성교 ( Kim Sung-Kyo ) - Kyungpook National University School of Dentistry Department of Conservative Dentistry
이효진 ( Lee Hyo-Jin ) - APEC Climate Center Climate Research Department
김현철 ( Kim Hyeon-Cheol ) - Pusan National University School of Dentistry Department of Conservative Dentistry
KMID : 1034420160410030176
Abstract
Objectives: This study aimed to compare two nickel-titanium systems (rotary vs. reciprocating) for their acceptance by undergraduate students who experienced nickel-titanium (NiTi) instruments for the first time.
Materials and Methods: Eighty-one sophomore dental students were first taught on manual root canal preparation with stainless-steel files. After that, they were instructed on the use of ProTaper Universal system (PTU, Dentsply Maillefer), then the WaveOne (WO, Dentsply Maillefer). They practiced with each system on 2 extracted molars, before using those files to shape the buccal or mesial canals of additional first molars. A questionnaire was completed after using each file system, seeking students' perception about 'Ease of use', 'Flexibility', 'Cutting-efficiency', 'Screwing-effect', 'Feeling-safety', and 'Instrumentation-time' of the NiTi files, relative to stainless-steel instrumentation, on a 5-point Likert-type scale. They were also requested to indicate their preference between the two systems. Data was compared between groups using t-test, and with Chi-square test for correlation of each perception value with the preferred choice (p = 0.05).
Results: Among the 81 students, 55 indicated their preferred file system as WO and 22 as PTU. All scores were greater than 4 (better) for both systems, compared with stainless-steel files, except for 'Screwing-effect' for PTU. The scores for WO in the categories of 'Flexibility', 'Screwing-effect', and 'Feeling-safety' were significantly higher scores than those of PTU. A significant association between the 'Screwing-effect' and students' preference for WO was observed.
Conclusions: Novice operators preferred nickel-titanium instruments to stainless-steel, and majority of them opted for reciprocating file instead of continuous rotating system.
키워드
Nickel-titanium file; Reciprocating; Rotary; Preference; Undergraduate student
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