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orthodontic Bracket

Madhur Upadhyay, Raja Shah, Sachin Agarwal, Meenakshi Vishwanath, Po-Jung Chen, Takafumi Asaki, Donald Peterson
A proper understanding of the force system created by various orthodontic appliances can make treatment of patients efficient and predictable. Reducing the complicated multi-bracket appliances to a simple two-bracket system for the purpose of force system evaluation will be the first step in this direction. However, much of the orthodontic biomechanics in this regard is confined to 2D experimental studies, computer modeling/analysis or theoretical extrapolation of existing models. The objective of this protocol is to design, construct and validate an in vitro 3D model capable of measuring the forces and moments generated by an archwire with a V-bend placed between two brackets...
July 24, 2018: Journal of Visualized Experiments: JoVE
Juan Fernando Aristizábal, Rosana Martínez-Smit, Cristian Díaz, Valfrido Antonio Pereira Filho
It is possible to unify three-dimensional customized orthodontic techniques and three-dimensional surgical technology. In this case report, it is introduced a treatment scheme consisting of passive self-ligation customized brackets and virtual surgical planning combined with the orthognathic surgery-first approach in a Class III malocclusion patient. Excellent facial and occlusal outcomes were obtained in a reduced treatment time of five months.
May 2018: Dental Press Journal of Orthodontics
Felipe Weidenbach Degrazia, Bruna Genari, Vilmar Antonio Ferrazzo, Ary Dos Santos-Pinto, Renésio Armindo Grehs
The aim of this study was to evaluate enamel roughness, quality of the enamel surfaces and time duration comparing different orthodontic adhesive removal protocols. Premolars were used to test three adhesive removal methods ( n = 20): five-blade carbide bur, 30-blade carbide bur, and ultrasonic diamond bur. Bracket was bonded using TransbondTM XT adhesive. Roughness with different parameters was measured before bracket bonding and after adhesive remnants removal. Micromorphological analysis of enamel surface ( n = 5) was performed by SEM images and categorized in enamel damage index-"perfect"; "satisfying"; "imperfect"; and "unacceptable"...
August 6, 2018: Dentistry journal
Tuqa Raghis, Ghiath Mahmoud, Ahmed Abdullah, Omar Hamadah
OBJECTIVE: To evaluate the clinical effect of 10.6 µm CO2 laser irradiation on the formation of demineralised lesions (DLs) around orthodontic brackets. DESIGN: A two-arm, split-mouth, randomised clinical trial (RCT). SETTING: The Orthodontic Department, Faculty of Dentistry, Damascus University, Syria. PARTICIPANTS: Twenty-six patients with a total of 520 teeth were recruited into the trial. METHOD: Two reversed quadrants of the dental arches in each patient were randomly allocated to CO2 laser application around the orthodontic brackets...
August 2, 2018: Journal of Orthodontics
Jaideep Singh, Ashish Joshi, Thomas Manjooran, Swetha Raghav, Ashesh Gautam, Jaladhi H Patel
AIMS: The aim of the study was to evaluate the shear bond strength (SBS) of orthodontic brackets after mouth rinsing. MATERIALS AND METHODS: Sixty orthodontically extracted maxillary premolar teeth were used in the present study. Buccal surfaces of all the teeth were bonded with orthodontic bracket. Later, each tooth was embedded into acrylic resin and stored in distilled water. All the teeth were randomly divided into four groups (group I: Artificial saliva, group II: Alcohol mouth rinse- Listerine, group III: Chlorhexidine (CHX) mouth rinse-Hexidine, and group IV: Herbal mouth rinse-Befresh) and stored in each solution for 12 hours...
July 1, 2018: Journal of Contemporary Dental Practice
Ibrahim Alshahrani, Khalid Abdelaziz, Moshabab A Asiry, Al Jowharah AAl AlShikh, Wala AlGhamdi, Hajer A Mansour
AIM: To evaluate the effect of different stain removal protocols with or without topical fluoride application on the bond strength of orthodontic brackets to enamel. MATERIALS AND METHODS: Eighty extracted premolars were randomly assigned into four groups according to the stain removal protocol. The stain removal protocols were (1) using rubber cup with prophylaxis paste in (G1, n = 20), (2) air-abrasion with prophy-jet polishing system (G2, n = 20), (3) micro-abrasion with opalusture polishing paste (G3, n = 20), and (4) macro-abrasion with ultrafine diamond finishing tips (G4, n = 20)...
July 1, 2018: Journal of Contemporary Dental Practice
Layene Figueiredo Almeida, Lidia Parsekian Martins, Renato Parsekian Martins
PURPOSE: To assess the effects of reducing the curing time of a high-power light-emitting diode (LED) unit (Valo, Ultradent, South Jordan, UT, USA) on shear bond strength (SBS) of metal brackets and on the amount of adhesive remnant of two orthodontic composites. METHODS: Eighty human premolars were divided into four groups (G1-4) according to curing time and composite: G1 (Transbond XT, 6 s), G2 (Opal Bond MV, 6 s), G3 (Transbond XT, 3 s), and G4 (Opal Bond MV, 3 s)...
July 31, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
Kenan Demirovic, Martina Slaj, Stjepan Spalj, Mladen Slaj, Sedin Kobaslija
Aim: Aim of article was to compare the shear bond strength of indirectly and directly bonded orthodontic brackets. Materials and methods: The experimental in vitro study included 60 maxillary and mandibular premolars. Teeth were mounted on cold-cure acrylic blocks for each tooth separately and divided into two groups: directly bonded brackets (30 teeth) and indirectly bonded brackets (30 teeth). Brackets (Discovery, Roth 0.022", Dentaurum, Ispringen, Germany) were bonded using Transbond XT (3M Unitek, Monrovia, CA, USA) in direct method, while in indirect technique, a combination of Transbond XT and Sondhi Rapid Set (3M Unitek, Monrovia, CA, USA) was used...
June 2018: Acta Informatica Medica: AIM
Monika E Machoy, Robert Koprowski, Liliana Szyszka-Sommerfeld, Krzysztof Safranow, Tomasz Gedrange, Krzysztof Woźniak
BACKGROUND: Medical digital imaging is the basis of effective medical diagnosis and is now in the mainstream of a dynamically developing branch of science. Optical coherence tomography (OCT) enables real-time in situ imaging of tissues without the need for biopsy, histological procedures or X-rays. OBJECTIVES: The aim of the study was to evaluate the application of OCT in orthodontic diagnostics and clinical practice by assessing the thickness of the enamel before and after orthodontic treatment...
July 26, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Naif Almosa, Hamayun Zafar
Objectives: To evaluate the incidence of orthodontic brackets detachment during orthodontic treatment. Methods: Using electronic databases; eligible studies up to January 2018 were retrieved, independently reviewed, and screened. The Coleman Methodology Scoring System (CMS) and Cochrane Collaboration's tool were used to assess quality and risk of bias in the included studies. Results: Of the seventeen studies included in the final synthesis, thirteen were categorized as randomized clinical trials (RCTs), one prospective cohort and retrospective survey each, whereas two studies could not be categorized...
May 2018: Pakistan Journal of Medical Sciences Quarterly
Antonija Jurela, Željko Verzak, Vlaho Brailo, Ivana Škrinjar, Karlo Sudarević, Bernard Janković
Objectives: It is known from the existing literature that metal ions within orthodontic appliances are prone to corrosion due to the salivary and bacterial interplay in the oral cavity. The results from the most studies show that levels of salivary nickel and chromium do not increase after the installment of orthodontic appliances. Material and methods: However, there are no studies on salivary levels of titanium, cobalt, copper and zinc in these patients. Salivary levels of nickel (Ni), titanium (Ti), chromium (Cr), cobalt (Co), copper (Cu) and zinc (Zn) were measured in 42 patients with ceramic brackets and in 42 patients with metal conventional brackets prior to insertion of orthodontic appliances and six months after insertion of orthodontic appliances by means of inductive coupled plasma/mass spectrometry...
March 2018: Acta Stomatologica Croatica
Verónica García-Sanz, Vanessa Paredes-Gallardo, Carlos Bellot-Arcís, Lluís Martínez-León, Rafael Torres-Mendieta, Javier Montero, Alberto Albaladejo
Bonding orthodontic brackets to ceramic materials is a challenging procedure; femtosecond (FS) laser conditioning could provide improved results, but the ideal settings for effective bracket-zirconia bonding have never been established. This study aimed to analyze the differences in surface roughness and shear bond strength (SBS) produced by different femtosecond laser settings and establish a protocol to prepare zirconia surfaces for optimal adhesion to metal orthodontic brackets. One hundred eighty zirconia samples were assigned to six groups according to surface treatment: (1) control; (2) air-particle abrasion (APA); (3) FS laser irradiation (300 mW output power, 60 μm inter-groove distance); (4) FS laser irradiation (200 mW, 100 μm); (5) FS laser irradiation (40 mW, 60 μm); and (6) FS laser irradiation (200 mW, 60 μm)...
July 18, 2018: Lasers in Medical Science
Fabio Savoldi, Corrado Paganelli
AIM: Resistance to sliding between bracket and wire is present, in a different magnitude, in most orthodontic treatments and it affects the biomechanics of the tooth movement. However, the influence of loop design on resistance to sliding is currently unknown. METHODS: In total, 12 stainless steel orthodontic wires of different sizes (0.016″×0.022″; 0.017″×0.025″), loop height (6mm, 8mm, 10mm), and loop type (open, close) were analyzed. Wires were tied with elastic ligatures to a bracket and tested during sliding at 0...
July 1, 2018: Journal of Applied Biomaterials & Functional Materials
Seyed Mohammad Javad Mortazavi, Maryam Paknahad, Iman Khaleghi, Mahsa Eghlidospour
BACKGROUND: The worldwide dramatic increase in the use of cell phones has generated great concerns about their potential adverse health effects. OBJECTIVE: The aim of the present study was to evaluate the effects of radiofrequency electromagnetic fields (RF-EMFs) emitted from mobile phones on the level of nickel release from orthodontic brackets. METHODS: Twenty stainless steel brackets were divided randomly into experimental and control groups (n=10)...
July 12, 2018: International Orthodontics
Yassir A Yassir, Ahmed M El-Angbawi, Grant T McIntyre, Gavin F Revie, David R Bearn
Objective: To compare the quality of orthodontic treatment between 0.018-inch and 0.022-inch slot bracket systems. Subjects and methods: Eligible participants aged 12 years or over were allocated to the 0.018-inch or 0.022-inch slot MBT appliance (3M-Unitek, Monrovia, California, USA) using block randomization in groups of 10. Outcome measures included: 1. ABO cast-radiograph evaluation (CR-EVAL), 2. peer assessment rating (PAR) scores, 3. incisor inclination, and 4...
July 11, 2018: European Journal of Orthodontics
Ahmed M El-Angbawi, Yassir A Yassir, Grant T McIntyre, Gavin F Revie, David R Bearn
Objective: To compare orthodontically induced inflammatory root resorption (OIIRR) and patient perception of pain during orthodontic treatment between 0.018-inch and 0.022-inch slot bracket systems. Subjects and methods: Eligible participants aged 12 years or above were allocated to treatment with the 0.018-inch or 0.022-inch slot MBT appliance (3M Unitek, Monrovia, California, USA) using block randomization in groups of 10. OIIRR was assessed radiographically using standardized periapical radiographs before and after 9 months from the start of treatment...
July 11, 2018: European Journal of Orthodontics
Yassir A Yassir, Ahmed M El-Angbawi, Grant T McIntyre, Gavin F Revie, David R Bearn
Objective: To compare treatment duration between 0.018-inch and 0.022-inch slot systems and determine factors influencing treatment duration. Subjects and methods: Eligible participants aged 12 years or over were allocated to the 0.018-inch or 0.022-inch slot MBT appliance (3M-Unitek, Monrovia, California, USA) using block randomization in groups of 10. Outcome measures included duration of: 1. overall treatment, 2. levelling and alignment, 3. working and finishing, and 4...
July 11, 2018: European Journal of Orthodontics
Cesar de Gregorio, Nestor Cohenca, Fabio Romano, Carolina Maschietto Pucinelli, Nathalie Cohenca, Martin Romero, Marilia Pacífico Lucisano, Raquel Assed Bezerra da Silva, Lea Assed Bezerra da Silva
BACKGROUND/AIM: The extra-alveolar dry period and storage medium in which a tooth is kept prior to replantation remain critical factors affecting the survival and repair potential of the periodontal ligament in avulsed teeth. When replantation is not immediate, replacement root resorption (RRR) is the most common complication. The aim of this histological study was to evaluate the effect of immediate controlled-orthodontic forces in periodontal healing of replanted teeth in a canine model...
July 14, 2018: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Maria-Gabriela Marc, Cédric Bazert, Jean-Pierre Attal
CONTEXT/OBJECTIVES: Clinical studies show a mean bond failure rate of orthodontic brackets, which ranges between 6% and 8%, with a predominance for the second mandibular premolars. The pre-coated flash-free adhesive ceramic brackets allow to obtain, according to their manufacturer, a low bond failure rate, while ensuring a simplified implementation. The aim of this study was to measure the shear bond strength of ceramic brackets bonded with the direct method using a pre-coated flash-free adhesive system, and to compare it with the shear bond strength of the old generation precoated brackets and that of operator coated brackets to the buccal surface of the second mandibular premolars...
July 10, 2018: International Orthodontics
Christian Meller, Timm Schott
OBJECTIVE: To investigate the integrity of a fluorescing resin-based sealant placed around orthodontic brackets using the Fluorescence-aided Identification Technique (FIT). MATERIALS AND METHODS: Standard brackets were bonded to the buccal surfaces of 17 extracted sound permanent premolar crowns sealed with ProSeal®. Specimens were thermocycled (20,000 cycles, 5-55°C), and toothbrushing was simulated using an electric toothbrush and artificial aqueous toothpaste slurry...
July 13, 2018: Angle Orthodontist
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