scholarly journals Evaluation of torque moment in esthetic brackets from bendable alloy wires

2021 ◽  
Author(s):  
Taiji Nakano ◽  
Akira Nakajima ◽  
Hiroto Watanabe ◽  
Ayaka Osada ◽  
Yasuhiro Namura ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Zirconium Oxide ◽  
Combined Effect ◽  
Elastic Module ◽  
Material Characteristics ◽  
Torque Moment ◽  
The Wire

ABSTRACT Objectives To examine the torque moment that occurs between esthetic brackets and bendable alloy (stainless steel [SS], titanium-molybdenum [Ti-Mo], and titanium-niobium [Ti-Nb]) wires. Materials and Methods This study examined ceramic (CR), zirconium oxide (ZC), polycarbonate (PC), and conventional metallic brackets (MT) (upper, 0.018-inch and 0.022-inch slots) combined with SS, Ti-Mo, and Ti-Nb wires using elastic module ligation. The torque moments delivered by various wire and bracket combinations were measured using a torque gauge apparatus. The wire torque angles at 5–40° were examined. Results The torque value increased in the order of CR, ZC, MT, and PC brackets for both 0.018-inch and 0.022-inch slots. The fracture points of the CR and ZC brackets combined with SS and Ti-Mo wires were approximately more than 30° and 35°, respectively. No fracture points were detected in the combination of ZC brackets and Ti-Nb wires. Conclusions The current study identified the material characteristics of CR, ZR, and PC brackets during torque tooth movements. The present results demonstrate a characteristic combined effect between different esthetic brackets and bendable alloy wires.

scholarly journals FRACTURE LOAD OF SILVER SOLDERED JOINTS ON STAINLESS STEEL AND COBALT-CHROMIUM ORTHODONTIC WIRES WITH VARIOUS JOINING CONFIGURATIONS

2021 ◽  
pp. 26-35
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Steel Wire ◽  
Fracture Load ◽  
Cobalt Chromium ◽  
Orthodontic Wires ◽  
Orthodontic Wire ◽  
The Wire ◽  
Site Planning ◽  
Band Material

The current research compared and analysed the tensile strength of silver soldered stainless steel and cobalt-chromium orthodontic wire joints with band material The effect of joint site planning on various orthodontic joining configurations was investigated. A total of sixty wire specimens were chosen, thirty in the stainless-steel group and thirty in the cobalt – chromium group. Again, each group's sample was divided into three subgroups, namely End – End, Round, and Orthodontic band material. The study findings suggested all three configurations can be used to make silver soldered joints regardless of the wire consistency. When subjecting the wire to joint site planning, however, stainless steel wire should be used with its limitations in mind.

scholarly journals FRACTURE LOAD OF SILVER SOLDERED JOINTS ON STAINLESS STEEL AND COBALT-CHROMIUM ORTHODONTIC WIRES WITH VARIOUS JOINING CONFIGURATIONS

2021 ◽  
pp. 26-35
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Steel Wire ◽  
Fracture Load ◽  
Cobalt Chromium ◽  
Orthodontic Wires ◽  
Orthodontic Wire ◽  
The Wire ◽  
Site Planning ◽  
Band Material

The current research compared and analysed the tensile strength of silver soldered stainless steel and cobalt-chromium orthodontic wire joints with band material The effect of joint site planning on various orthodontic joining configurations was investigated. A total of sixty wire specimens were chosen, thirty in the stainless-steel group and thirty in the cobalt – chromium group. Again, each group's sample was divided into three subgroups, namely End – End, Round, and Orthodontic band material. The study findings suggested all three configurations can be used to make silver soldered joints regardless of the wire consistency. When subjecting the wire to joint site planning, however, stainless steel wire should be used with its limitations in mind.

scholarly journals Influence of heat cycling conditions in the additive manufacturing of stainless steel and al-si alloy raw parts on their microstructure

2019 ◽  
pp. 133-138
Author(s):  
I. L. Pobol ◽  
A. A. Bakinovski ◽  
M. K. Stepankova ◽  
A. N. Burin ◽  
A. D. Gubko
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Austenitic Stainless Steel ◽  
Beam Current ◽  
Post Processing ◽  
Heat Cycling ◽  
Additive Method ◽  
The Wire

The microstructure of samples of austenitic stainless steel and Al-Si alloy, obtained by the wire based additive method under various conditions was investigated. The effect of the beam current, the deposition intervals and the electron beam post-processing on the microstructure is shown.

scholarly journals Thermomechanical Characteristics of a Functionally Graded Mounted Uniform Disc with/without Rigid Casing

2019 ◽  
Author(s):  
Vebil Yildirim
Keyword(s):  
Thermal Conductivity ◽  
Stainless Steel ◽  
Zirconium Oxide ◽  
Radial Direction ◽  
Functionally Graded ◽  
Material Density ◽  
Thermomechanical Characteristics ◽  
Metal Ceramic ◽  
Parametric Studies ◽  
Nickel Silicon

In the present paper, thermomechanical attributes of a power-law graded uniform mounted disc with or without rigid casing are investigated analytically under centrifugal and steady-state thermal loads within the framework of axisymmetric infinitesimal plane-stress elasticity theory. Young's modulus, material density, thermal expansion coefficient and thermal conductivity are all assumed to be constantly changed in the radial direction with different inhomogeneity indexes while Poisson's ratio is kept constant. Two parametric studies are conducted by both hypothetically and physically chosen metal-ceramic pairs namely nickel-silicon nitride (Ni-Si3N4), aluminum-aluminum oxide (Al-Al2O3), and stainless steel-zirconium oxide (SUS304-ZrO2).

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