Experimental Observation of Pedicle Screws in Postoperative CT scan - Stainless steel vs. Titanium

Shin, Byung-Joon; Shin, Yang Sik; Kwon, Hee; Park, Jai Soung; Rah, Soo Kyoon

doi:10.4055/jkoa.1998.33.3.813

J Korean Orthop Assoc

1998

DOI: 10.4055/jkoa.1998.33.3.813

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Experimental Observation of Pedicle Screws in Postoperative CT scan - Stainless steel vs. Titanium

Byung-Joon Shin¹,

Yang Sik Shin²,

Hee Kwon³

et al.

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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

Hwang

2015

Korean J Orthod

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ObjectiveThis study aimed to compare the frictional force (FR) in self-ligating brackets among different bracket-archwire angles, bracket materials, and archwire types.MethodsPassive 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° torque. The orthodontic wires used included 0.018 round and 0.019 × 0.025 in rectangular stainless steel wires. The FR was measured at 0°, 5°, and 10° 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.ResultsThe 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° 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.ConclusionsThe 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.

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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

Hwang

2015

Korean J Orthod

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show abstract

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Experimental Observation of Pedicle Screws in Postoperative CT scan - Stainless steel vs. Titanium

Cited by 1 publication

References 0 publications

A comparative study of frictional force in self-ligating brackets according to the bracket-archwire angulation, bracket material, and wire type

A comparative study of frictional force in self-ligating brackets according to the bracket-archwire angulation, bracket material, and wire type

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