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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BOS5-0021-0029

Czasopismo

Journal of Achievements in Materials and Manufacturing Engineering

Tytuł artykułu

Development of rolling mill for rectangular orthodontic wires production

Autorzy Totten, G. E.  Filho, A. I.  Gouvéa, C. A. R.  Neto, A.  Casteletti, L. C. 
Treść / Zawartość http://www.journalamme.org
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Purpose: In orthodontic treatments, wires of different metallic alloys are used for alignment, leveling, correction of the molar position, space closing, finish and retention. The purpose of the paper is the characteristics of austenitic stainless steel wires, with a square traverse section, which were produced using a rolling mill built for this purpose, are presented here. Design/methodology/approach: With respect to finish and retention, these wires are responsible for adequate positioning of the upper teeth on the lower teeth. Wires that are subjected to incisor torque require high resistance and stiffness. For this, wires of rectangular austenitic stainless steel are used due to high modulus of elasticity and good corrosion resistance in the oral environment. Because of the rectangular geometry, wire production requires process development suitable for industrial scale manufacture with geometric characteristics and mechanical properties better adapted to the use conditions. Findings: To obtain wires with such characteristics, a rolling mill was developed for the production of rectangular wires by a rolling process with the objective of reducing cost of the cold drawing process that is currently used which utilize complex and expensive wire-drawing dies. In addition to the rolling process itself, wire deformation, microhardness, tension and bend tests were also performed. Research limitations/implications: A rolling-mill was built that successfully produced dental wires within acceptable tolerances and physical/mechanical properties.These wires exhibited excellent hardness and tensile strength, although slightly less than analogous commercial wires. It is expected that this problem are corrected by using initial wires with a higher hardness, since this property is directly related with the tensile strength. Originality/value: In these tests, wire geometry, surface finish and mechanical properties were successfully adapted for use in orthodontic treatments.
Słowa kluczowe
PL produkcja   przetwarzanie   drut o przekroju prostokątnym   ortodoncja   walcarka  
EN manufacturing   processing   rectangular wires   orthodontics   rolling mill  
Wydawca International OCSCO World Press
Czasopismo Journal of Achievements in Materials and Manufacturing Engineering
Rocznik 2007
Tom Vol. 24, nr 1
Strony 450--455
Opis fizyczny Bibliogr. 12 poz., fot., rys., tab.
Twórcy
autor Totten, G. E.
autor Filho, A. I.
autor Gouvéa, C. A. R.
autor Neto, A.
autor Casteletti, L. C.
  • Portland State University, Department of Mechanical and Materials Engineering, Portland, OR - USA, GETotten@aol.com
Bibliografia
[1] The history of orthodontics. Designed in cooperation with The Shodor Education Inc, The University of North Carolina attn Chapel Hill, Copyright 1999. Available in http://www.unc.edu/depts/appl_sci/ortho / . Access in: 01 fev. 2006.
[2] A.D. Smit, R.M. Pilliar, R. Chernecki, Dental implant materials: it adds effect of preparative procedures on surface topography, Journal of Biomedical Materials Research 25 (1991) 1045-1068.
[3] S.R. Drake, et al., Mechanical properties of orthodontic wires in tension, bending, and torsion. American Journal of Orthodoncy Dental Orthopedic 1982 (1998) 206-210.
[4] W.D. Callister Jr. Science and Engineering of Materials: An introduction. Fifth edition 2002. Publishing LTC - technical Books and Scientific S.A. Cap. 12.
[5] H. Helman P.R. Celtin, Fundamentos of Mechanical Conformação of the Metals. 2nd edition 1993. Foundation Chrstiano Ottoni. Cap. 1, 6 and 8.
[6] M. Nastran, K. Kuzman, Stabilisation of Mechanical Properties of the wire by Roller Straightening. Journal of Materials Processing Technology 125-126 (2005) 711 – 719.
[7] B. Pourladian Fracture Toughness Evaluation of High-Strength Cold-Drawn Type 304 Stainless Steel Wire. Wire Journal International - August 2003.
[8] A. Sarban, G. Paddeu, J. Pontieu An Automatic Width Control System For Wire Rolling Mills. Wire Journal International - October 2001.
[9] BS 3507:1976 - Orthodontic wire and closes and dental ligadure wire.
[10] American Society goes Testing and Materials - Standard Test Method goes Microhardness of Materials: Designation and 384-89, Annual book of standard ASTM. Easton 01.02 (1990) 02-18.
[11] American Society goes Testing and Materials – Standard Test Method goes Tension Testing of Metallic Materials. Designation: And 8 - 01€2. Annual book of ASTM standards.
[12] K. Yoshida, D. Sriprapai, T. Shinohara, T. Imai – Drawing of stainless shaped steel microwire of 400-600 μm size. Wire Journal International - March 2004.
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