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Utility archwire

Ting Kang, Shi-You Huang, Jie-Jie Huang, Qi-Hong Li, Dong-Feng Diao, Yin-Zhong Duan
This study aims to assess the effects of diamond-like carbon (DLC) films on fretting wear behavior of orthodontic archwire-bracket contacts. 'Mirror-confinement-type electron cyclotron resonance (MCECR) plasma sputtering' was utilized to deposit carbon films on stainless steel archwires and brackets. Nanostructure of carbon films such as the bonding structure, cross-sectional thickness and surface roughness were studied. The fretting wear behavior of various archwire-bracket contacts were investigated by using a self-developed tester in ambient air and artificial saliva...
June 2015: Journal of Nanoscience and Nanotechnology
K Vinay, M J Venkatesh, Rabindra S Nayak, Azam Pasha, M Rajesh, Pradeep Kumar
BACKGROUND: Friction between archwires and brackets is assuming greater importance for finishing with increased use of sliding mechanics in orthodontics as friction impedes the desired tooth movement. The following study is conducted to compare and evaluate the effect of ligation on friction in sliding mechanics using 0.022" slot bracket in dry condition. MATERIALS & METHODS: In the study 48 combinations of brackets, archwires and different ligation techniques were tested in order to provide best combination that offers less friction during sliding mechanics...
April 2014: Journal of International Oral Health: JIOH
Paul W Major, Roger W Toogood, Hisham M Badawi, Jason P Carey, Surbhi Seru
AIMS: To better understand the effects of copper nickel titanium (CuNiTi) archwire size on bracket-archwire mechanics through the analysis of force/couple distributions along the maxillary arch. The hypothesis is that wire size is linearly related to the forces and moments produced along the arch. MATERIALS AND METHODS: An Orthodontic Simulator was utilized to study a simplified high canine malocclusion. Force/couple distributions produced by passive and elastic ligation using two wire sizes (Damon 0...
December 2014: Journal of Orthodontics
Hussam Al Fakir, Jason P Carey, Garrett W Melenka, David S Nobes, Giseon Heo, Paul W Major
OBJECTIVE: Torque is applied to orthodontic brackets in order to alter the buccal-lingual angulation of a tooth. One factor that can affect torque is the ligation mode used to retain the archwire in the bracket slot. The objective of this study was to investigate the effects of stainless steel ligation on torque expression and bracket deformation. METHODS: This study utilized 60 upper right central incisor Damon Q brackets and 60 Ormco Orthos Twin brackets. The brackets used in this study were subdivided into four groups: (1) Damon Q ligated with SS ligature; (2) Damon Q with the sliding bracket door; (3) Orthos Twin bracket ligated with SS wire; and (4) Orthos Twin ligated with elastic ties...
September 2014: Journal of Orthodontics
Ulises Guzman, Laurance Jerrold, Ahmad Abdelkarim
OBJECTIVE: The main objective of this in vivo study was to determine the incidence and location of fracture in round nickel-titanium (NiTi) and round stainless steel orthodontic archwires, both commonly used in orthodontics. Secondarily, this study sought to determine if there is any correlation between archwire fracture and gender, diameter of the archwire, arch type (maxillary/mandibular) or bracket used. DESIGN: In vivo study. MATERIALS AND METHODS: One thousand orthodontic patients (1434 archwires) were evaluated during regular treatment visits to assess archwire fracture and location...
December 2013: Journal of Orthodontics
R Condò, A Casaglia, E Armellin, S G Condò, L Cerroni
OBJECTIVE: Elastomeric materials play an important role in the orthodontic practice, including the retraction force to move teeth into extraction sites, closing diastemas, selective shifting of the midline and generalized space closure. Frictional resistance and ligating strength of archwire-bracket-ligature complex occurs during utilization of elastomeric and metallic ligatures when orthodontic forces are applicated. The aim of this study was to analyze elastic deformation of three types of elastomeric ligatures, after clinical use...
2013: Oral & Implantology
S Y Huang, J J Huang, T Kang, D F Diao, Y Z Duan
This study aims to coat diamond-like carbon (DLC) films onto nickel-titanium (NiTi) orthodontic archwires. The film protects against fluoride-induced corrosion and will improve orthodontic friction. 'Mirror-confinement-type electron cyclotron resonance plasma sputtering' was utilized to deposit DLC films onto NiTi archwires. The influence of a fluoride-containing environment on the surface topography and the friction force between the brackets and archwires were investigated. The results confirmed the superior nature of the DLC coating, with less surface roughness variation for DLC-coated archwires after immersion in a high fluoride ion environment...
October 2013: Journal of Materials Science. Materials in Medicine
Sai Prakash Adusumilli, P Sudhakar, Bhaskar Mummidi, D Praveen Kumar Varma, Sunil Arora, A Radhika, Amit Maheshwari
AIM: The present case report describes the importance of understanding of biomechanical and clinical considerations in application of Forsus appliance in correction of class II skeletal malocclusion. BACKGROUND: Angle's class II malocclusion is one of the most prevailing that may be either skeletal or dental presenting with different clinical manifestations. There are number of appliances to treat such a malocclusion in a growing child. Fixed functional appliances are indicated for class II corrections in patients who report late with minimal residual growth left...
November 2012: Journal of Contemporary Dental Practice
Kamna Srivastava, Pavan Kumar Chandra, Nandini Kamat
OBJECTIVE: Fluorides can cause corrosion and degradation in mechanical properties of commonly used archwires by forming hydrofluoric acid HF and causing disruption of protective titanium oxide layer. Hence, the aim of this study was to assess the change in load deflection characteristics of Ni-Ti, Cu Ni-Ti, S.S, and β-Ti wires on immersing in fluoride mouth rinses of two types- Phosflur and neutral NaF mouth rinse utilizing a modified bending test and comparing it to control. MATERIALS AND METHODS: Round preformed wires were immersed in 10 ml of control and test solution (Phosflur and S-Flo mouth rinse) for 1...
May 2012: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Jonathan Fok, Roger W Toogood, Hisham Badawi, Jason P Carey, Paul W Major
OBJECTIVE: To better understand the mechanics of bracket/archwire interaction through analysis of force and couple distribution along the maxillary arch. MATERIALS AND METHODS: An orthodontic simulator was utilized to study high canine malocclusion. Force/couple distributions, referenced to the center of resistance (CR) of each tooth, produced by passive ligation brackets and round wire were measured. Tests were repeated for 12 bracket sets with 12 wires per set...
November 2011: Angle Orthodontist
Sung-Seo Mo, Seong-Hun Kim, Sang-Jin Sung, Kyu-Rhim Chung, Youn-Sic Chun, Yoon-Ah Kook, Gerald Nelson
INTRODUCTION: Our objective was to evaluate the factors that affect effective torque control during en-masse incisor and canine retraction when using partially osseointegrated C-implants (Cimplant, Seoul, Korea) as the exclusive source of anchorage without posterior bonded or banded appliances. METHODS: Base models were constructed from a dental study model. No brackets or bands were placed on the maxillary posterior dentition during retraction. The working archwire was modeled by using a 3-dimensional beam element (ANSYS beam 4, Swanson Analysis System, Canonsburg, Pa) with a cross section of 0...
July 2011: American Journal of Orthodontics and Dentofacial Orthopedics
Esen Aydoğdu, Ömür Polat Özsoy
OBJECTIVE: To compare the dentofacial effects of mandibular incisor intrusion using mini-implants with those of a conventional incisor intrusion mechanic, the utility arch. MATERIALS AND METHODS: Twenty-six deep-bite patients were enrolled to one of the two groups. In group 1 the mandibular incisors were intruded using a 0.16 × 0.22-inch stainless-steel segmental wire connected to two mini-implants. In group 2 the mandibular incisor intrusion was performed using a conventional utility arch...
September 2011: Angle Orthodontist
Vinod Krishnan, Anand Krishnan, R Remya, K K Ravikumar, S Asha Nair, S M A Shibli, H K Varma, K Sukumaran, K Jyothindra Kumar
The present research was aimed at developing surface coatings on β titanium orthodontic archwires capable of protection against fluoride-induced corrosion. Cathodic arc physical vapor deposition PVD (CA-PVD) and magnetron sputtering were utilized to deposit thin films of titanium aluminium nitride (TiAlN) and tungsten carbide/carbon (WC/C) coatings on β titanium orthodontic archwires. Uncoated and coated specimens were immersed in a high fluoride ion concentration mouth rinse, following a specially designed cycle simulating daily use...
April 2011: Acta Biomaterialia
Jun Liu, Ling Zou, Zhi-he Zhao, Neala Welburn, Pu Yang, Tian Tang, Yu Li
AIM: To determine cephalometrically the mechanism of the treatment effects of non-extraction and multiloop edgewise archwire (MEAW) technique on postpeak Class II Division 1 patients. METHODOLOGY: In this retrospective study, 16 postpeak Class II Division 1 patients successfully corrected using a non-extraction and MEAW technique were cephalometrically evaluated and compared with 16 matched control subjects treated using an extraction technique. Using CorelDRAW software, standardized digital cephalograms pre- and post-active treatments were traced and a reference grid was set up...
December 2009: International Journal of Oral Science
Gi-Ja Lee, Ki-Ho Park, Young-Guk Park, Hun-Kuk Park
In orthodontics, the surface roughnesses of orthodontic archwire and brackets affect the effectiveness of arch-guided tooth movement, corrosion behavior, and the aesthetics of orthodontic components. Atomic force microscopy (AFM) measurements were used to provide quantitative information on the surface roughness of the orthodontic material. In this study, the changes in surface roughness of various orthodontic bracket slots before and after sliding movement of archwire in vitro and in vivo were observed through the utilization of AFM...
October 2010: Micron: the International Research and Review Journal for Microscopy
Seong-Hun Kim, HyeRan Choo, Young-Sook Hwang, Kyu-Rhim Chung
This case report introduces a novel double archwire mechanics concept using orthodontic mini-implants and a miniplate to relocate ectopically impacted maxillary canines in a 14-year-old female with a Class III subdivision left malocclusion. The objective of this orthodontic treatment was to salvage the maxillary lateral incisors so they could be used for conservative restorations upon completion of the orthodontic treatment and to guide the impacted maxillary canines to their correct anatomical positions. The authors report that an iatrogenic root resorption of the maxillary lateral incisors, which is caused by a direct root contact between teeth during the active relocating procedure, can be minimized by using double-archwire mechanics...
2008: World Journal of Orthodontics
Kyu-Rhim Chung, Seong-Hun Kim, Yoon-Ah Kook, Ju-Hyon Son
AIM: To show the effectiveness of the osseointegration-based mini-implant (C-Implant) in managing anterior torque control during en masse retraction of anterior dentition. Severe gable bends can be applied on utility archwire that is directly engaged in the hole of C-Implants to generate anterior torque on the anterior segment of teeth to resist lingual tipping during en masse retraction. This treatment mechanics is called the biocreative therapy type I technique. Partial osseointegration of C-Implants on the anteroposterior alveolar ridge is stable enough to resist intrusive force, vertically, and retraction force, anteroposteriorly, at the same time...
2008: World Journal of Orthodontics
Robert P Kusy, John Q Whitley
INTRODUCTION: In recent years, nickel-titanium (Ni-Ti) archwires have been developed that undergo thermal transitions. Before the practitioner can fully utilize these products, the effect of those transitions within the clinical application must be understood. METHODS: The transitional temperatures and mechanical stiffnesses of 3 archwire alloys--stainless steel, beta-titanium, and Ni-Ti--were investigated were for 7 products. Among the nickel-titanium alloys, 2 were thought to represent classic Ni-Ti products and 3 copper (Cu)-Ni-Ti products...
February 2007: American Journal of Orthodontics and Dentofacial Orthopedics
Maurício Tatsuei Sakima, Michel Dalstra, Birte Melsen
Thermodynamic nickel-titanium (NiTi) wires have become increasingly popular. The relationship between the temperature variation within the mouth and the force level delivered is, however, far from elucidated. The aim of this study was to evaluate the influence of possible intraoral temperature differences on the forces exerted by seven commercially available 0.019 x 0.025 inch NiTi archwires. As mouth temperature ranges from 33 to 37 degrees C most of the time, all wires were tested at five different temperatures between 30 and 40 degrees C in an orthodontic wire-testing device, a so-called Force System Identification (FSI) apparatus, placed in a climate chamber...
June 2006: European Journal of Orthodontics
Pascal Garrec, Bruno Tavernier, Laurence Jordan
The choice of the most suitable orthodontic wire for each stage of treatment requires estimation of the forces generated. In theory, the selection of wire sequences should initially utilize a lower flexural rigidity; thus clinicians use smaller round cross-sectional dimension wires to generate lighter forces during the preliminary alignment stage. This assessment is true for conventional alloys, but not necessarily for superelastic nickel titanium (NiTi). In this case, the flexural rigidity dependence on cross-sectional dimension differs from the linear elasticity prediction because of the martensitic transformation process...
August 2005: European Journal of Orthodontics
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