論文

査読有り
2014年11月

Effects of third-order torque on frictional force of self-ligating brackets

ANGLE ORTHODONTIST
  • Takeshi Muguruma
  • ,
  • Masahiro Iijima
  • ,
  • William A. Brantley
  • ,
  • Karamdeep S. Ahluwalia
  • ,
  • Naohisa Kohda
  • ,
  • Itaru Mizoguchi

84
6
開始ページ
1054
終了ページ
1061
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2319/111913-845.1
出版者・発行元
E H ANGLE EDUCATION RESEARCH FOUNDATION, INC

Objective: To investigate the effects of third-order torque on frictional properties of self-ligating brackets (SLBs).
Materials and Methods: Three SLBs (two passive and one active) and three archwires (0.016 x 0.022-inch nickel-titanium, and 0.017 x 0.025-inch and 0.019 x 0.025-inch stainless steel) were used. Static friction was measured by drawing archwires though bracket slots with four torque levels (0, 10, 20, 30), using a mechanical testing machine (n = 10). A conventional stainless-steel bracket was used for comparison. Results were subjected to Kruskal-Wallis and Mann-Whitney U-tests. Contact between the bracket and wire was studied using a scanning electron microscope.
Results: In most bracket-wire combinations, increasing the torque produced a significant increase in static friction. Most SLB-wire combinations at all torques produced less friction than that from the conventional bracket. Active-type SLB-wire combinations showed higher friction than that from passive-type SLB-wire combinations in most conditions. When increasing the torque, more contact between the wall of a bracket slot and the edge of a wire was observed for all bracket types.
Conclusions: Increasing torque when using SLBs causes an increase in friction, since contact between the bracket slot wall and the wire edge becomes greater; the design of brackets influences static friction.

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.2319/111913-845.1
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/24738791
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000345057800017&DestApp=WOS_CPL