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Prevalence of Nickel Allergy and Longitudinal Evaluation of Periodontal Abnormalities in Orthodontic Allergic Patients
Camila Alessandra Pazzini Gilberto Oliveira Júnior Leandro Silva Marques Cássio Vicente Pereira Luciano José Pereira
2010/3/5
Objective: To determine the prevalence of nickel allergy in a sample of orthodontic patients and longitudinally compare the clinical periodontal status of these individuals with that of a group of non...
Force Characteristics of Nickel Titanium Closed Coil Springs（3M, GAC, RMO）
NiTi Closed Coil Springs Force Characteristics
2009/4/2
Introduction: The aim of this study was to compare the characteristics of deflection load of three kinds of nickel titanium closed coil springs.Methods and Materials: This research was an experiment...
Chromium Release from New Stainless Steel, Recycled and Nickel-free Orthodontic Brackets
Chromium release Reconditioned brackets Nickel-free brackets Artificial saliva Batch procedure
2010/3/5
Objective: To test the hypothesis that there is no difference in the amounts of chromium released from new stainless steel brackets, recycled stainless steel brackets, and nickel-free (Ni-free) orthod...
The effect of long-term deflection on permanent deformation of Nickel-Titanium archwires
Orthodontic wires Nitinol Spring back Permanent deformation Stress-relaxation
2009/1/23
The clinician must now consider the alloy along with cross-sectional shape and size when selecting archwires. The purpose of this study is to quantify permanent deformation after long-term deflect...
Nickel-titanium spring properties in a simulated oral environment
Nickel-Titanium Spring Mechanics
2009/1/12
A study of nickel-titanium springs was undertaken to determine whether their mechanical properties are affected by prolonged exposure to a static, simulated oral environment. Stainless steel springs...
Repelling magnets versus superelastic nickel-titanium coils in simultaneous distal movement of maxillary first and second molars
Dental alloys Magnetics Supercoils Force Orthodontic appliance Molar Tooth movement
2009/1/12
Eighteen subjects, aged 12.5 to 18.3 years, with Class II malocclusion, deep overbite and moderate space deficiency in the maxilla were treated orthodontically using repelling rare earth magnets on on...
Comparisons of the thermodynamic properties of three nickel-titanium orthodontic archwires
Thermodynamic archwires Nitinol Recovery TTR
2009/1/12
The unique memory property of thermodynamic wire is only partially understood. It is believed to result from the wire's inherent capability to markedly alter its atomic bonding forces as a function of...
In vitro release of nickel and chromium from different types of simulated orthodontic appliances
Nickel Chromium Corrosion Orthodontic appliances
2009/1/12
Five identical samples, each consisting of a fixed appliance, a headgear and a quad-helix for one-half of a dental arch, were immersed in 0.9% sodium chloride for 2 hours, 24 hours and 7 days. A con...
The effect of short-term temperature changes on the mechanical properties of rectangular nickel titanium archwires tested in torsion
Orthodontic archwires Materials testing Torsional stiffness Nickel titanium alloys
2009/1/8
Due to their exceptional temperature sensitivity, superelastic nickel titanium wires may be affected by temperature changes associated with ingestion of cold or hot food. It has been assumed that th...
The effect of temperature on the elastic responses to longitudinal torsion of rectangular nickel titanium archwires
Archwires Materials testing Torsional stiffness Nickel titanium alloys Copper nickel titanium alloys Superelasticity
2009/1/8
To investigate responses to longitudinal torsion and the effect of temperature on the torsional stiffness of superelastic nickel titanium archwires, eight batches of rectangular wires were tested at...
Corrosion of stainless steel, nickel-titanium, coated nickel-titanium, and titanium orthodontic wires
Corrosion Potentiostatic anodic polarization Orthodontic wires
2009/1/4
Orthodontic wires containing nickel have been implicated in allergic reactions. The potential for orthodontic wires to cause allergic reactions is related to the pattern and mode of corrosion with...
Salivary Nickel and Chromium in Patients With Fixed Orthodontic Appliances
Nickel Chromium Salivary concentration Fixed orthodontic appliances
2009/1/4
The purpose of this study was to determine the alterations in the chromium and nickel concentrations in the saliva of orthodontic patients treated with fixed orthodontic appliances. Forty-five ort...
Elastic Flexural Properties of Multistranded Stainless Steel Versus Conventional Nickel Titanium Archwires
Archwires Elastic properties Multistranded Stainless steel Nickel titanium
2008/12/26
Based on a recent investigation that modeled the elastic properties (ie, strength, stiffness and range) of multistranded wires made from linearly elastic materials, three-stranded (triple) and six...
In Vivo Aging of Orthodontic Alloys：Implications for Corrosion Potential, Nickel Release, and Biocompatibility
Nickel Nickel release Corrosion potential Orthodontic alloy Biocompatibility
2008/12/26
Despite the large number of studies investigating nickel release from orthodontic stainless steel and nickel-titanium alloys, there is a lack of conclusive evidence with respect to the composition a...
Nickel Content of As-Received and Retrieved NiTi and Stainless Steel Archwires: Assessing the Nickel Release Hypothesis
Nickel release, NiTi, Stainless steel archwires, EDS.
2008/12/11
This study assesses the nickel content of as-received and retrieved stainless steel and NiTi archwires alloys. New and used brand-matched, composition-matched, and cross section–matched archwires ...