論文

査読有り
2015年2月

In vivo degradation of orthodontic miniscrew implants: surface analysis of as-received and retrieved specimens

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
  • Masahiro Iijima
  • ,
  • Takeshi Muguruma
  • ,
  • Masahiro Kawaguchi
  • ,
  • Yoshitaka Yasuda
  • ,
  • Itaru Mizoguchi

26
2
開始ページ
71
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s10856-015-5405-7
出版者・発行元
SPRINGER

This study investigated in vivo degradation of Ti-6Al-4V alloy miniscrew implants. Miniscrew implants were placed in patients, and the surfaces were studied upon retrieval by scanning electron microscopy, microscale X-ray photoelectron spectroscopy, elastic recoil detection analysis and nanoindentation testing. Bone-like structures were formed on the retrieved specimens. The hardness and elastic modulus of the surfaces of the retrieved specimens were significantly lower than the as-received specimens, although no statistically significant differences were observed for the hardness and elastic modulus in the bulk region. Thick organic over-layer containing carbon, oxygen, and nitrogen, with the thickness greater than 50 nm, covered the retrieved specimens, and higher concentrations of hydrogen were detected in the retrieved specimens compared with the as-received specimens. Minimal degradation of the bulk mechanical properties of miniscrew implants was observed after clinical use, although precipitation of bone-like structures, formation of a carbonaceous contamination layer, and hydrogen absorption were observed on the surfaces of miniscrew implants.

Web of Science ® 被引用回数 : 4

リンク情報
DOI
https://doi.org/10.1007/s10856-015-5405-7
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/25631268
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000349402400011&DestApp=WOS_CPL