搜索结果: 1-15 共查到“医学 Nickel”相关记录30条 . 查询时间(0.085 秒)
A comparative study of frictional resistance of stainless steel, nickel titanium, TMA, timolium & CNA archwires with stainless steel brackets - An in vitro study
comparative study frictional resistance stainless steel nickel titanium
2010/11/3
A comparative study of frictional resistance of stainless steel, nickel titanium, TMA, timolium & CNA archwires with stainless steel brackets - An in vitro study .
Corrosion behavior of ion implanted nickel-titanium orthodontic wire in fluoride mouth rinse solutions
Ni-Ti wire Corrosion Plasma immersion ion implantation
2010/11/26
This study investigated the corrosion properties of ion implanted nickel-titanium wire (Neo Sentalloy Ionguard) in artificial saliva and fluoride mouth rinse solutions (Butler F Mouthrinse, Ora-Bliss)...
Hypersensitivity to conventional and to nickel-free orthodontic brackets
Hypersensitivity Nickel Stainless steel Orthodontics corrective
2009/10/19
The aim of this study was to evaluate the allergenic potential of orthodontic brackets, comparing the cutaneous sensitivity provoked by metals present in conventional metallic brackets to that provoke...
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...
Evaluation of Cobalt, Chromium, and Nickel Concentrations in Plasma and Blood of Patients with Removable Partial Dentures
Base metal alloys Whole blood Plasma
2009/9/14
This study assessed the plasma and blood concentrations of Cr, Co, and Ni among subjects using removable partial dentures. A comparison was made between subjects with and without RPD treatment history...
CONTACT ALLERGY TO NICKEL: PATCH TEST SCORE CORRELATES WITH IL-5, BUT NOT WITH IFN-GAMMA NICKEL-SPECIFIC SECRETION BY PERIPHERAL BLOOD LYMPHOCYTES
allergic contact dermatitis patch test contact allergy lymphocytes
2010/12/22
Traditionally, allergic contact dermatitis (ACD) has been associated with the activity of Th1 lymphocytes that secrete interferon gamma. Recent evidence indicates that other cells.
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...