대한치과교정학회지 (The korean journal of orthodontics)

  • 제45권1호
  • /
  • Pages.13-19
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  • 2015
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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A comparative study of frictional force in self-ligating brackets according to the bracket-archwire angulation, bracket material, and wire type

  • Lee, Souk Min (Department of Orthodontics, School of Dentistry, Yonsei University) ;
  • Hwang, Chung-Ju (Department of Orthodontics, Institute of Craniofacial Deformities, School of Dentistry, Yonsei University)
  • 투고 : 2012.06.03
  • 심사 : 2014.10.28
  • 발행 : 2015.01.25
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초록

Objective: This study aimed to compare the frictional force (FR) in self-ligating brackets among different bracket-archwire angles, bracket materials, and archwire types. Methods: Passive and active metal self-ligating brackets and active ceramic self-ligating brackets were included as experimental groups, while conventional twin metal brackets served as a control group. All brackets were maxillary premolar brackets with 0.022 inch [in] slots and a $-7^{\circ}$ torque. The orthodontic wires used included 0.018 round and $0.019{\times}0.025$ in rectangular stainless steel wires. The FR was measured at $0^{\circ}$, $5^{\circ}$, and $10^{\circ}$ angulations as the wire was drawn through the bracket slots after attaching brackets from each group to the universal testing machine. Static and kinetic FRs were also measured. Results: The passive self-ligating brackets generated a lower FR than all the other brackets. Static and kinetic FRs generally increased with an increase in the bracket-archwire angulation, and the rectangular wire caused significantly higher static and kinetic FRs than the round wire (p < 0.001). The metal passive self-ligating brackets exhibited the lowest static FR at the $0^{\circ}$ angulation and a lower increase in static and kinetic FRs with an increase in bracket-archwire angulation than the other brackets, while the conventional twin brackets showed a greater increase than all three experimental brackets. Conclusions: The passive self-ligating brackets showed the lowest FR in this study. Self-ligating brackets can generate varying FRs in vitro according to the wire size, surface characteristics, and bracket-archwire angulation.

키워드

참고문헌

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피인용 문헌

  1. Cone Beam Computed Tomography-based Evaluation of the Anterior Teeth Position Changes obtained by Passive Self-ligating Brackets vol.17, pp.8, 2015, https://doi.org/10.5005/jp-journals-10024-1901
  2. Evaluation of friction in metal, ceramic and self-ligating brackets submitted to sliding mechanics vol.47, pp.4, 2015, https://doi.org/10.1590/1807-2577.05318
  3. Comparison of frictional coefficient and surface roughness between three different active self-ligating brackets: An experimental in vitro study vol.12, pp.6, 2015, https://doi.org/10.4103/jioh.jioh_53_20
  4. EFFECTS OF THE INSERTION OF AN ARCHWIRE THIN-WALLED SLEEVE IN ACCELERATING THE CANINE’S TRANSLATION vol.20, pp.9, 2015, https://doi.org/10.1142/s0219519420400096
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