Micro-X-Ray diffraction study of new nickel-titanium rotary endodontic instruments

William A. Brantley, Masahiro Iijima, William A.T. Clark, Scott R. Schricker, John M. Nusstein, Itaru Mizoguchi

研究成果: Conference contribution

抄録

Background: Next-generation rotary endodontic instruments with improved clinical performance are being fabricated from special superelastic NiTi wires. We are reporting the initial metallurgical study of two recently introduced rotary instruments, HyFlex® CM™ (Coltène Whaledent) and Vortex Blue® (Dentsply Tulsa Dental Specialties), using Micro-X-ray diffraction. A wide range of sizes and tapers was examined, and analyses were performed at five sites on each instrument. Results: Similar x-ray diffraction patterns were observed for both instruments, and no dependence on size and taper was found. The lowest-intensity peaks occurred for the tip region. Four austenite peaks and one martensite peak were evident, along with a lower-angle peak that matched anatase titanium oxide. Preferred orientation existed for both austenite and martensite. Conclusions: Instruments were manufactured by similar proprietary processes. Future metallographic, SEM and TEM observations are needed to characterize instrument microstructures fully, since x-ray diffraction peak intensities are considerably diminished for the work-hardened martensite phase.

本文言語English
ホスト出版物のタイトルBiomaterials Science
ホスト出版物のサブタイトルProcessing, Properties and Applications V
編集者Susmita Bose, Amit Bandyopadhyay, Roger Narayan
出版社American Ceramic Society
ページ47-54
ページ数8
ISBN(電子版)9781119190028
出版ステータスPublished - 2015
外部発表はい
イベントNext Generation Biomaterials and Surface Properties of Biomaterials Symposia - Materials Science and Technology 2014 Conference, MS and T 2014 - Pittsburgh, United States
継続期間: 2014 10 122014 10 16

出版物シリーズ

名前Ceramic Transactions
254
ISSN(印刷版)1042-1122

Other

OtherNext Generation Biomaterials and Surface Properties of Biomaterials Symposia - Materials Science and Technology 2014 Conference, MS and T 2014
国/地域United States
CityPittsburgh
Period14/10/1214/10/16

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学

フィンガープリント

「Micro-X-Ray diffraction study of new nickel-titanium rotary endodontic instruments」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル