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Ahmed OK, Kadhum AS. Effectiveness of laser-engineered copper-nickel titanium versus superelastic nickel-titanium aligning archwires: A randomized clinical trial. Korean J Orthod 2024; 54:16-25. [PMID: 38008906 PMCID: PMC10811358 DOI: 10.4041/kjod23.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/18/2023] [Accepted: 08/29/2023] [Indexed: 11/28/2023] Open
Abstract
Objective : To compare the effectiveness of laser-engineered copper-nickel titanium (SmartArch) and superelastic nickel-titanium (SENT) archwires in aligning teeth and inducing root resorption and pain experienced by patients. Methods : Two-arm parallel groups with a 1:1 allocation ratio were used. The participants were patients aged 11.5 years and older with 5-9 mm of mandibular anterior crowding who were indicated for non-extraction treatment. The primary outcome was alignment effectiveness, assessed using Little's irregularity index (LII) over 16 weeks with a single wire (0.016-inch) in the SmartArch group and 2 wires (0.014- and 0.018-inch) in the SENT group (8 weeks each). Secondary outcomes included root resorption evaluated by pre- and post-intervention periapical radiographs and pain levels recorded by the participants during the first week. Results : A total of 40 participants were randomly allocated into 2 groups; 33 completed the study and were analyzed (16 in the SmartArch group and 17 in the SENT group, aged 16.97 ± 4.05 years). The total LII decrease for the SmartArch and SENT groups was 5.63 mm and 5.29 mm, respectively, which was neither statistically nor clinically significant. Root resorption was not significantly different between the groups. The difference in pain levels was not statistically significant for the first 5 days following wire placement; however, there was a significant difference favoring the SENT group in the final 2 days. Conclusions : SmartArch and SENT archwires were similarly effective during the alignment phase of orthodontic treatment. Root resorption should be observed throughout the treatment with either wire. SmartArch wires demonstrated higher pain perception than SENT wires.
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Affiliation(s)
- Omar Khairullah Ahmed
- Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
- Ministry of Health, Baghdad, Iraq
| | - Ammar Salim Kadhum
- Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Stoyanova-Ivanova A, Georgieva M, Petrov V, Martins JNR, Andreeva L, Petkov A, Petrova N, Georgiev V. Thermal Behavior Changes of As-Received and Retrieved Bio-Active ® (BA) and TriTanium ® (TR) Multiforce Nickel-Titanium Orthodontic Archwires. Materials (Basel) 2023; 16:ma16103776. [PMID: 37241402 DOI: 10.3390/ma16103776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/17/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023]
Abstract
Multiforce nickel-titanium (NiTi) orthodontic archwires release progressively increasing forces in a front-to-back direction along their length. The properties of NiTi orthodontic archwires depend on the correlation and characteristics of their microstructural phases (austenite, martensite and the intermediate R-phase). From a clinical and manufacturing point of view, the determination of the austenite finish (Af) temperature is of the greatest importance, as in the austenitic phase, the alloy is most stable and exhibits the final workable form. The main purpose of using multiforce orthodontic archwires is to decrease the intensity of the applied forces to the teeth with a small root surface area, such as the lower central incisors, and also provide forces high enough to move the molars. With the optimally dosed forces of multiforce orthodontic archwires in the frontal, premolar and molar segments, the feeling of pain can be reduced. This will contribute to the greater cooperation of the patient, which is of utmost importance to achieve optimal results. The aim of this research was to determine the Af temperature at each segment of as-received and retrieved Bio-Active® and TriTanium® archwires with dimensions of 0.016 × 0.022 inches, investigated by the differential scanning calorimetry (DSC) method. A classical Kruskal-Wallis one-way ANOVA test and multi-variance comparison based on the ANOVA test statistic using the Bonferroni corrected Mann-Whitney test for multiple comparisons were used. The incisor, premolar and molar segments have different Af temperatures, and they decrease from the anterior to posterior so that the posterior segment has the lowest Af. Bio-Active® and TriTanium® with dimensions of 0.016 × 0.022 inches can be used as first leveling archwires by additional cooling and are not recommended for use on patients with mouth breathing.
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Affiliation(s)
- Angelina Stoyanova-Ivanova
- G. Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria
| | - Mirela Georgieva
- Faculty of Dental Medicine, Medical University of Sofia, St. G. Sofiiski Blvd., 1431 Sofia, Bulgaria
| | - Valeri Petrov
- Faculty of Dental Medicine, Medical University of Sofia, St. G. Sofiiski Blvd., 1431 Sofia, Bulgaria
| | - Jorge N R Martins
- Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Rua Professora Teresa Ambrósio, 1600-277 Lisboa, Portugal
- Grupo de Investigação em Bioquimica e Biologia Oral, Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), 1600-277 Lisboa, Portugal
- Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE), 1600-277 Lisboa, Portugal
| | - Laura Andreeva
- Faculty of Dental Medicine, Medical University of Sofia, St. G. Sofiiski Blvd., 1431 Sofia, Bulgaria
| | - Alexander Petkov
- H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK
| | - Nadia Petrova
- Institute of Mineralogy and Crystallography "Acad. Ivan Kostov", Bulgarian Academy of Sciences, "Acad. Georgi Bonchev" Str. 107, 1113 Sofia, Bulgaria
| | - Velizar Georgiev
- G. Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria
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Farzanegan F, Shafaee H, Norouzi H, Bagheri H, Rangrazi A. Comparison of the High Cycle Fatigue Behavior of the Orthodontic NiTi Wires: An in Vitro Study. Pesqui Bras Odontopediatria Clín Integr 2022. [DOI: 10.1590/pboci.2022.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Guo S, Wu T, Kwak M, Lu W, Ma W, Liu Q, Liu H, Meng Q, Liu G, Cheng X, Zhao X. Achieving a combination of decent biocompatibility and large near-linear-elastic deformation behavior in shell-core-like structural TiNb/NiTi composite. J Mech Behav Biomed Mater 2021; 123:104789. [PMID: 34450418 DOI: 10.1016/j.jmbbm.2021.104789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 08/15/2021] [Accepted: 08/18/2021] [Indexed: 11/30/2022]
Abstract
As expected from the material design, a novel shell-core-like structural TiNb/NiTi composite possessing both decent biocompatibility and large near-linear-elastic deformation behavior (namely as near-linear elasticity accompanied by high elastic strain limit) was prepared successfully by a hot pack-rolling combined with cold rolling procedure. Non-cytotoxic TiNb outer shell obstructs the NiTi inner core from cells and provides the decent biocompatibility of TiNb/NiTi composite. Large near-linear-elastic deformation behavior for this TiNb/NiTi composite has been confirmed to be associated with intrinsic elastic deformation, two types of reversible stress-induced martensitic transformations (i.e. β↔α'' and B2↔B19' transformations) occurring in a homogeneous manner, together with the (001) compound twin in B19' martensitic plates. Our study provides a new design approach for developing NiTi-based composites with both decent biocompatibility and large near-linear-elastic deformation behavior for biomedical or engineering applications.
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Affiliation(s)
- Shun Guo
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Tinghui Wu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Minkyung Kwak
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Weiqun Lu
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Wen Ma
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China; Youke Publishing Co., Ltd., Grinm Group Co., Ltd., Beijing, 100088, China
| | - Qing Liu
- Youke Publishing Co., Ltd., Grinm Group Co., Ltd., Beijing, 100088, China; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Haixia Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Qingkun Meng
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, China
| | - Guanglei Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaonong Cheng
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xinqing Zhao
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
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Wagner D, Strub M, Tran ML, Piotrowski B, Laheurte P. In vitro comparison of the mechanical behaviour of archwires after computer-assisted and conventional bracket positioning protocols. Int Orthod 2021; 19:512-521. [PMID: 34272206 DOI: 10.1016/j.ortho.2021.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 11/20/2022]
Abstract
INTRODUCTION The mechanical properties of orthodontic archwires can be defined using experimental setups incorporating brackets that provide conditions closer to those encountered in vivo. We aimed to compare a methodology based on computer-aided design with the gold standard protocol, performed when brackets are engaged to a full-size archwire to test the behaviour of wires in this condition. METHODS Three models simulating a dental arch with an orthodontic fixed appliance (0.018-inch aesthetic conventional brackets) were designed. The brackets were positioned with a stainless-steel full-size wire on the first two models, with different interbracket distances. The setup 3, based on a computer-assisted design, allowed individualized placement of each bracket. Mean forces recorded and standard deviation were compared for a 0.016×0.022-inch copper-nickel-titanium wire deflected until 2mm. RESULTS The inter-bracelet distances do not cause a statistical difference in the average maximum force recorded (12.6N and 11.4N; P=0.081) whereas the behaviour of the wires is affected. With setup 3, the recorded efforts (mean value: 8N) are statistically lower than with setup 1 and 2 respectively (P=0.018; P=0.012). CONCLUSION An individualization of the housings by CAD-CAM dedicated to each bracket optimizes their placement. In our test conditions, the mechanical behaviour of the wires is more influenced by the positioning methods of the brackets than by the value of the interbracket distance. In perspective, our innovative methodology can be extended to other types of brackets.
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Affiliation(s)
- Delphine Wagner
- University of Lorraine, LEM3, UMR CNRS 7239, rue Félix Savart 7, Metz 57073, France; UMR 7357, ICube laboratory, Boulevard Sébastien Brant 300, Illkirch 67412, France; University of Strasbourg, Dental faculty, rue Ste Elisabeth 8, Strasbourg 67000, France; Strasbourg University Hospital, Place de l'Hôpital 1, Strasbourg 67000, France.
| | - Marion Strub
- University of Strasbourg, Dental faculty, rue Ste Elisabeth 8, Strasbourg 67000, France; Strasbourg University Hospital, Place de l'Hôpital 1, Strasbourg 67000, France
| | - Maï-Linh Tran
- University of Lorraine, Dental faculty, avenue de la Forêt de Haye 7, Vandoeuvre-lès-Nancy 54505, France
| | - Boris Piotrowski
- University of Lorraine, LEM3, UMR CNRS 7239, rue Félix Savart 7, Metz 57073, France
| | - Pascal Laheurte
- University of Lorraine, LEM3, UMR CNRS 7239, rue Félix Savart 7, Metz 57073, France
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Kassab E, Gomes JADCP. Corrosion induced fracture of NiTi wires in simulated oral environments. J Mech Behav Biomed Mater 2021; 116:104323. [PMID: 33494019 DOI: 10.1016/j.jmbbm.2021.104323] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/04/2021] [Accepted: 01/06/2021] [Indexed: 11/21/2022]
Abstract
This work aims to assess the influence of corrosion on fracture of nickel titanium (NiTi) superelastic wires in physiological solutions (9 g/l NaCl) with and without addition of 1 g/l NaF. The electrochemical cell was coupled to a Hounsfield Tensiometer tensile machine commonly used for corrosion investigation of alloys under stress and strain. Corrosion tests were performed on unstrained and strained conditions up to 4% total strain. This strain limit corresponds to 50% of the total elongation achieved into the superelastic stress plateau of the alloy. All wire specimens were analyzed after testing by scanning electron microscopy (SEM). The results showed that localized corrosion occurred for NiTi wires in solution containing fluoride, while no corrosion attack was detected in NaCl 9 g/l solution. There was no significant difference between the corrosion resistance of unstrained and strained wires. However, brittle like fracture occurred in NaCl + NaF solution within the superelastic domain of the material. The most relevant conclusion achieved is that the use of superelastically strained NiTi in oral environments in the presence of fluoride is followed by significant risk of corrosion induced fracture.
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