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© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Background and Objectives: The aim of the present study is to compare the efficacy of three root canal preparation systems in the shaping of 3D-printed root canal replicas of single rooted teeth. Materials and Methods: Sixty 3D-printed root canal replicas were produced and divided into three groups, each consisting of twenty samples. Each group was shaped with a different instrument: Reciproc Blue R25/08 (VDW GmbH, Munich, Gemany), WaveOne Gold Primary 25/07 (Dentsply Sirona, Ballaigues, Switzerland), and ProTaper Gold F2 25/08 (Denstply Sirona). To ensure the reproducibility of pre- and post-operative CBCT images of the root canals, the endodontic printed replicas were placed in a mould of silicon impression material. A cone-beam computed tomography (CBCT) software was used to compare pre- and post-instrumentation images collected at three levels of the root canal length: 3, 6, and 9 mm from the apical foramen. The amount of transportation, centring ability, and curvature angle after shaping were evaluated for each system. The results were statistically analysed and compared using one-way analysis of variance (ANOVA). Results: Regarding the transportation of the root canal after shaping, significant differences between groups at 3 mm (p = 0.010721) and 6 mm (p = 0.000046) were recorded in the mesio-distal direction, while in the bucco-lingual significant differences were only observed at 6 mm (p = 0.000554). Reciproc Blue removed more dentin from the mesial and buccal wall of the root canal. When evaluating the centring ability of the three systems, significant differences were observed between the groups at the level of 9 mm (p = 0.037258) in the mesio-distal direction, and at the level of 6 mm (p = 0.038197) in the bucco-lingual direction. Significant differences of the canal curvature angle after shaping were also observed between groups (p = 0.000001). Reciproc Blue straightened the curvature the most, while ProTaper Gold the least. Conclusions: All systems produced minor root canal transportation. No instrument was able to achieve a perfect centring preparation of the root canal. All systems produced a small degree of root canal straightening.

Details

Title
Evaluation of the Shaping Ability of Three Thermally Treated Nickel–Titanium Endodontic Instruments on Standardized 3D-printed Dental Replicas Using Cone-Beam Computed Tomography
Author
Orel, Laura 1 ; Oana-Alexandra Velea-Barta 1 ; Luminita-Maria Nica 2 ; Andreea-Simona Boscornea-Pușcu 1 ; Razvan Mihai Horhat 2 ; Roxana-Maria Talpos-Niculescu 2 ; Sinescu, Cosmin 3   VIAFID ORCID Logo  ; Virgil-Florin Duma 4   VIAFID ORCID Logo  ; Dan-Dumitru Vulcanescu 5 ; Topala, Florin 6 ; Meda-Lavinia Negrutiu 3   VIAFID ORCID Logo 

 3rd Department, Discipline of Restorative Dentistry and Endodontics, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania; [email protected] (L.O.); [email protected] (A.-S.B.-P.) 
 3rd Department, Discipline of Restorative Dentistry and Endodontics, Faculty of Dental Medicine, TADERP Research Center, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania; [email protected] (R.M.H.); [email protected] (R.-M.T.-N.) 
 1st Department, Discipline of Prosthesis Technology and Dental Materials, Faculty of Dental Medicine, Research Center in Dental Medicine Using Conventional and Alternative Technologies, Victor Babes University of Medicine and Pharmacy, 300070 Timisoara, Romania; [email protected] (C.S.); [email protected] (M.-L.N.) 
 3OM Optomechatronics Group, Faculty of Engineering, Aurel Vlaicu University of Arad, 310130 Arad, Romania; [email protected] 
 Emergency Hospital for Children Louis Turcanu, 300011 Timisoara, Romania; [email protected] 
 3rd Department, Discipline of Prosthetic Dentistry, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania; [email protected] 
First page
901
Publication year
2021
Publication date
2021
Publisher
MDPI AG
ISSN
1010660X
e-ISSN
16489144
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2576454924
Copyright
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.