These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Effects of sliding velocity on friction: an in vitro study at extremely low sliding velocity approximating orthodontic tooth movement.
    Author: Yanase Y, Ioi H, Nishioka M, Takahashi I.
    Journal: Angle Orthod; 2014 May; 84(3):451-8. PubMed ID: 24160997.
    Abstract:
    OBJECTIVE: To evaluate the effects of sliding velocity on friction, particularly at extremely low sliding velocity approximating orthodontic tooth movement. MATERIALS AND METHODS: Stainless-steel (SS) 0.022-inch preadjusted brackets and 0.016- and 0.016×0.022-inch SS wires and superelastic nickel-titanium 0.016×0.022-inch wires were used for this test. The wire was secured in a SS preadjusted bracket with an elastomeric module. One end of the wire was pulled upward 1.5 mm at a speed of 5.0×10(-7), 1.0×10(-5), 1.0×10(-4), 1.0×10(-3), 1.0×10(-2), and 1.0×10(-1) mm/s by the micrometer. The measurements were conducted 10 times and averaged. Tukey-Kramer tests were used to compare the mean differences of each testing measurement among the different sliding velocities. RESULTS: The frictional forces tended to increase as the sliding velocity decreased. The mean frictional force for 5.0×10(-7) mm/s sliding velocity (approximating orthodontic tooth movement) was 106.8 cN in 0.016×0.022-inch SS wires, almost double the 1.0×10(-1) mm/s sliding velocity. CONCLUSION: The effects of sliding velocity cannot be ignored when we estimate frictional forces in clinical orthodontics.
    [Abstract] [Full Text] [Related] [New Search]