Frictional and mechanical properties of surface modified nickel-titanium orthodontic archwires

Natthalak Tantiwinyupong, Rochaya Chintavalakorn, Peerapong Santiwong, Anak Khantachawana

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

The purpose of this study was to investigate the surface hardness, frictional force and load-deflection characteristic of three types of nickel-titanium archwires; DLC-coated, CH4-PBII and CF4-PBII NiTi orthodontic archwires. The NiTi wires were deposited with DLC films and were implanted with CH4 and CF4 using Plasma-Based Ion Implantation and Deposition (PBIID) method. These archwires and upper canine brackets with slot dimension of 0.022-inch were used in this study. Surface hardness of three types of surface modified NiTi orthodontic archwires was measured using atomic force microscopy (AFM). Frictional resistance was determined using a Universal Testing Machine with a load cell of 50 N. The custom-fabricated friction-testing device was designed and bonded each bracket in an accurate position. Load-deflection characteristic was evaluated by conducting the three-point bending test with universal testing machine. The results showed that DLC-coated NiTi wires had the lowest mean of frictional force followed by CH4-PBII, CF4-PBII and conventional NiTi wires. DLC-coated NiTi wires had the highest mean of surface hardness and there was no significant difference in the unloading force at 0.5, 1.0, 2.0 and 3.0 mm of the load-deflection graphs between different types of NiTi orthodontic archwires. The results can be concluded that the surfaces of nickel-titanium orthodontic archwires can be successfully modified by the PBIID method to increase surface hardness and reduce frictional force between stainless steel brackets and NiTi archwires. The load-deflection characteristics of three types of surface modified archwires remain unchanged.

Original languageEnglish
Title of host publicationComposite Materials and Material Engineering III
EditorsKazuo Umemura
PublisherTrans Tech Publications Ltd
Pages39-43
Number of pages5
ISBN (Print)9783035714913
DOIs
Publication statusPublished - 2019
Event4th International Conference on Composite Materials and Materials Engineering, ICCMME 2019 - Tokyo, Japan
Duration: 19 Jan 201922 Jan 2019

Publication series

NameKey Engineering Materials
Volume801 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference4th International Conference on Composite Materials and Materials Engineering, ICCMME 2019
Country/TerritoryJapan
CityTokyo
Period19/01/1922/01/19

Keywords

  • Diamond-like carbon
  • Orthodontic archwires
  • Surface modified archwires

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