Article
Dentistry, Oral Surgery & Medicine
Dongsheng Yu, Li Guo, Jing Gao, Jie Liu, Deqin Yang
Summary: Curved root canals pose challenges in cleaning, shaping, and filling. Postoperative complications are caused by apical extrusion of debris and root canal transportation. This study aims to comprehensively evaluate the differences in these factors among different NiTi files.
Article
Materials Science, Multidisciplinary
Muhammad Ali, Muhammad Adeel Ahmed, Azeem Ul Yaqin Syed, Asmat Jamil, Seher Pervaiz Khan, Ahmed A. AlMokhatieb, Abdulaziz Abdulwahed, Khulud A. Al-Aali, Fahim Vohra, Tariq Abduljabbar
Summary: This study compared the amount of apical debris extrusion after using different file systems for root canal preparation. The results showed that the WaveOne system resulted in a significantly lower amount of apical debris extrusion compared to the ProTaper Next and ProTaper Gold rotary file systems.
Article
Chemistry, Physical
Sebastian Buerklein, David Donnermeyer, Tim Julian Hentschel, Edgar Schaefer
Summary: This study evaluated the performance of five rotary nickel-titanium instruments in preparing curved root canals. The results showed that all instruments performed well, with Jizai instruments exhibiting the best shaping ability and minimal adjustments to canal curvature.
Article
Dentistry, Oral Surgery & Medicine
Ahmad Abdel Hamid Elheeny, Mahmoud Ahmed Abdelmotelb
Summary: Comparison of postoperative pain intensity between two single-file systems with different kinetics showed no significant difference.
INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Yina Liu, Meizhi Chen, Weilong Tang, Chang Liu, Minquan Du
Summary: This study compared the outcomes of five nickel-titanium single-file instrumentation systems in severely curved molar root canals. The results showed that there were no significant differences between the systems in most parameters, but XP-endo Shaper and V-Taper 2H performed better in terms of canal transportation and cleaning ability compared to the other systems.
Article
Dentistry, Oral Surgery & Medicine
Ruba Mustafa, Taher Al Oman, Suhad Al-Nasrawi, Rami Al Fodeh, Alaa Dkmak, Julfikar Haider
Summary: This laboratory-based study compared the amount of apically extruded debris and preparation time of different rotary systems in severely curved root canals. The results showed that HyFlex Controlled Memory and HyFlex EDM groups extruded significantly more debris compared to other systems, while TruNatomy extruded the least. The preparation time did not show significant differences among the groups.
JOURNAL OF ENDODONTICS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Sang Won Kwak, Jung-Hong Ha, Ya Shen, Markus Haapasalo, Hyeon-Cheol Kim
Summary: The study observed a significant correlation between the curvature angle and the type of file system, with an increase in total and maximum torque generated as the degree of canal curvature increased. NiTi files with reciprocating motion showed higher torque values at 15 degrees and 25 degrees compared to files with continuous rotation, with ProTaper Universal exhibiting the steepest increase in torque with increasing curvature angle. ProTaper Next files had the lowest torque values at higher canal angles of 35 degrees and 45 degrees.
JOURNAL OF ENDODONTICS
(2021)
Article
Chemistry, Multidisciplinary
Alessio Zanza, Rodolfo Reda, Giuseppe Familiari, Stefania Annarita Nottola, Dario Di Nardo, Luca Testarelli, Orlando Donfrancesco
Summary: This study assessed surface alterations of four reciprocating instruments before and after shaping resin-simulated root canals, showing significant differences in cutting edges for one instrument and higher presence of debris for another after simulated use.
APPLIED SCIENCES-BASEL
(2022)
Article
Dentistry, Oral Surgery & Medicine
Emmanuel J. N. L. Silva, Jorge N. R. Martins, Natasha C. Ajuz, Henrique dos Santos Antunes, Victor Talarico Leal Vieira, Francisco Manuel Braz-Fernandes, Felipe Goncalves Belladonna, Marco Aurelio Versiani
Summary: This study aimed to compare 3 reciprocating systems in terms of design, metallurgy, mechanical properties, and shaping ability. The results showed that although there were differences in design, temperature transition phases, and mechanical behavior parameters among the tested instruments, they were similar in terms of shaping ability.
CLINICAL ORAL INVESTIGATIONS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Jorge N. R. Martins, Emmanuel J. N. L. Silva, Abayomi O. Baruwa, Rui Pereira da Costa, Francisco M. Braz M. Fernandes, Marco A. Versiani
Summary: This study compared two flat-side single-file rotary instruments with three single-file reciprocating systems through a multimethod assessment. The results showed that the flat-side rotary instruments underperformed the reciprocating instruments in terms of cyclic fatigue, maximum torque, angle of rotation, maximum buckling strength, and flexibility. Manufacturing inconsistencies were also observed in some of the flat-side instruments.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Review
Chemistry, Physical
Sang Won Kwak, Ya Shen, He Liu, Hyeon-Cheol Kim, Markus Haapasalo
Summary: Understanding the characteristics of nickel-titanium files is crucial for dentists due to their popularity in root canal therapy. The torque required to rotate the files is considered a parameter for stress generation, and understanding the conditions that may cause instrument fractures is important. The stress generated during root canal shaping can lead to microcracks in the instruments and dentinal wall, emphasizing the need to prevent fractures. Various experimental approaches have been used to measure this stress, and this review focuses on the stress generated under different experimental conditions and the factors related to torque generation.
Article
Medicine, General & Internal
Changjian Li, Le Liu, Yanfeng Li, Xin Wang, Haiyun Liu, Jiaxin Bao, Jing Wang, Jiadong Fan
Summary: The study found that only 5% sodium hypochlorite can affect the diameter of rotary nickel-titanium instruments, and other disinfectants do not reduce the instrument's fracture resistance. The breaking positions of instruments mainly occurred at the bending segment of the root canal, with a higher breaking frequency closer to the apical foramen.
Article
Dentistry, Oral Surgery & Medicine
Natasa Predin Djuric, Peet Van der Vyver, Martin Vorster, Zunaid Ismail Vally
Summary: In this study, it was found that the clockwise reciprocation groups showed less apical debris extrusion during canal preparation, while WaveOne Gold displayed higher extrusion amounts. Therefore, when choosing a file system, the impact on apical debris extrusion should be considered.
AUSTRALIAN ENDODONTIC JOURNAL
(2021)
Article
Dentistry, Oral Surgery & Medicine
Burcu Nihan Yuksel, Aysenur Oncu, Berkan Celikten, Burak Bilecenoglu, Ayse Isil Orhan, Kaan Orhan
Summary: The study evaluated different rotary systems in terms of microcracks and shaping of the danger zone in primary molars. It found that WaveOne Gold caused the highest dentin reduction in the danger zone area, while XP-endo Shaper had the highest number of microcracks. Further studies should consider anatomical variations and chemical composition of primary teeth for better understanding.
INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Mary S. H. Lam, Jeffrey W. W. Chang, Gary S. P. Cheung
Summary: This study compared two reciprocating NiTi systems operated by novices in curved root canals and found that both systems left similar amounts of un-instrumented canal wall, and resulted in similar extent of canal transportation. The majority of canals were transported towards the isthmus or furcation aspect, with remaining dentine wall thinnest at the furcal aspect near the middle root region.
CLINICAL ORAL INVESTIGATIONS
(2021)
