Evaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires

Nishijo, Miki; Ebihara, Arata; Tokita, Daisuke; Doi, Hisashi; Hanawa, Takao; Okiji, Takashi

doi:10.4012/dmj.2017-276

Cited by 18 publications

(13 citation statements)

References 39 publications

(57 reference statements)

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“…An original device described in our previous articles [19][20][21][22] was used with a few modifications. The device consists of an endodontic motor (X-Smart Plus, Dentsply Sirona, Ballaigues, Switzerland), a motorized test stand (MX2-500N, Imada, Aichi, Japan), and a torque/force measuring unit.…”

Section: Automated Root Canal Instrumentation and Torque/force Analyzmentioning

confidence: 99%

Enhanced root canal-centering ability and reduced screw-in force generation of reciprocating nickel-titanium instruments with a post-machining thermal treatment

et al. 2020

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This study aimed to evaluate the influence of a post-machining thermal treatment on canal-centering ability and torque/force generation of reciprocating nickel-titanium instruments. Simulated J-shaped resin canals were prepared with reciprocating instruments sharing identical geometric architecture and with/without post-machining thermal treatment (Reciproc Blue/Reciproc, VDW, Munich, Germany). Using an original automated root canal instrumentation and torque/force analyzing device, files were operated in a combination of reciprocation and up-and-down motion, and torque/force values were monitored. Canal-centering ratios were measured after superimposition of pre-and post-instrumentation images. Compared with Reciproc, Reciproc Blue showed a significantly lower canal-centering ratio (i.e., less deviation; p<0.05) at 0-1 mm from the apex and generated a significantly smaller upward maximum vertical force (p<0.05). Under standardized conditions using the automated device, Reciproc Blue showed better canal-centering ability and reduced screw-in forces than Reciproc, indicating that the post-machining thermal treatment confers superior performance to reciprocating nickel-titanium instruments.

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Section: Automated Root Canal Instrumentation and Torque/force Analyzmentioning

confidence: 99%

Enhanced root canal-centering ability and reduced screw-in force generation of reciprocating nickel-titanium instruments with a post-machining thermal treatment

et al. 2020

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“…Due to the properties of flexibility and resistance to torsional fracture, nickel-titanium rotary files have been considered as the substitute to the stainless-steel files. [ 20 ] In the present study, 47% ( n = 8) of the endodontists and 45% ( n = 109) of GDPs used nickel-titanium rotary files to prepare the canal. This finding is higher than the previously reported studies from Denmark, Australia, and Saudi Arabia.…”

Section: Discussionmentioning

confidence: 94%

Perceived effectiveness about endodontic practice among private general dental practitioners in Riyadh city, Saudi Arabia

Elrashid

Alderaa

Alissa

et al. 2020

J Family Med Prim Care

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Background: Application of newer techniques in endodontics improves the prognosis and reduces the time to operate patients; hence, the present study was conducted to determine the characteristics of endodontic practice and to compare these characteristics between General Dental Practitioners (GDPs) and endodontists with regards to their years of experience in Riyadh city, Saudi Arabia. Materials and Method: A cross-sectional study was conducted among GDPs and endodontists working in private sector in Riyadh. Study subjects were chosen from 5 areas of Riyadh by stratified random sampling. A structured, pretested, closed-ended, and self-administered questionnaire consisting of 36 items was employed. Questionnaire identified different aspects of endodontic practice among participants. Information related to their behavior and perceived effectiveness, and demographic data were also collected. Results and Discussion: A total of 259 practitioners participated in the present study. The mean behavior and perceived effectiveness scores were 5.73 (71.63%) and 1.16 (58%), respectively. A total of 64 respondents (24.7%) used magnification, while 167 (64.5%) employed digital radiography/cone-beam computed tomography. Rotary instruments were employed by 170 participants (65.64%) and adjunctive activator during irrigation was utilized by 50 (19.30%) of respondents. A majority of 217 respondents (83.80%) reported that they need further training. Correlation analysis revealed that gender was significantly associated with perceived effectiveness ( r = 0.136, P = 0.029). Conclusions: Behavior and perceived effectiveness of practitioners is far from satisfactory and a majority of practitioners identified the need for further training. There was a statistically significant correlation between gender and perceived effectiveness.

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“…It is important to emphasize that reciprocating motion minimizes the flexural stresses and provides an opportunity to increase the canal centering ability by reducing the taper lock effect of the instrument during canal preparation. From the viewpoint of pediatric endodontics, the preference of reciprocating motion instead of continuous rotation could reduce the stress and required time for preparation in curved root canals [36]. With these in mind, the obtained superior results of R-Motion regarding the patterns of canal transportation and volumetric dentin removal compared to PTG and manual instrumentation groups may be supported and clarified from a differential aspect.…”

Section: Discussionmentioning

confidence: 98%

Canal Transportation and Volumetric Dentin Removal Abilities of Ni-Ti Rotary File Systems in Curved Primary Root Canals: CBCT Study

2021

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Current improvements in nickel–titanium (Ni–Ti) rotary file systems have created a paradigm shift in the root canal therapy of primary teeth. Therefore, it is necessary to perform a comprehensive evaluation regarding the efficiencies of newly manufactured instruments for different parameters. The current study was conducted to evaluate the abilities of RaceEvo, R-Motion, ProTaper Gold (PTG) systems in curved primary root canals with regard to the patterns of canal transportation and volumetric dentin removal by using cone-beam computed tomography (CBCT). Two experimental sets were designed following the determination of experimental groups by using pre- and post-operative CBCT data: canal transportation and volumetric dentin removal. The highest amount of canal transportation was significantly detected in the PTG group in comparison to RaceEvo and R-Motion groups. When the mean values of volumetric dentin removal data were analyzed across all groups, the PTG group again exhibited the significantly highest value of dentin removal volumetrically, compared to RaceEvo, R-Motion and manual instrumentation groups. It is possible to state that R-Motion and RaceEvo rotary systems could be used as reliable alternatives without causing adverse mechanical effects and maintaining the original root canal anatomy of curved primary root canal systems compared with PTG rotary systems and manual instrumentation, with a high diagnostic sensitivity of CBCT in pediatric endodontics when the alternative methods are not adequate.

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Evaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires

Cited by 18 publications

References 39 publications

Enhanced root canal-centering ability and reduced screw-in force generation of reciprocating nickel-titanium instruments with a post-machining thermal treatment

Enhanced root canal-centering ability and reduced screw-in force generation of reciprocating nickel-titanium instruments with a post-machining thermal treatment

Perceived effectiveness about endodontic practice among private general dental practitioners in Riyadh city, Saudi Arabia

Canal Transportation and Volumetric Dentin Removal Abilities of Ni-Ti Rotary File Systems in Curved Primary Root Canals: CBCT Study

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