Kanarelis Takis, Antonopoulos George, Kanarelis Nikolaos

Title: In vitro study of friction between 2 different lingual bracket slot design


  • This presentation-study forms a theoretical approach.

Study Axioms:

1)   We used the Dassault Systems SolidWorks Corporation software. Based on that, we made the mechanical design, the analysis and simulation of moves, errors and corrections thereof.

2)   We designed a .018 x .025 mm inch (≃0.0457 X 0.0635 mm) slot, with a 45 ° angle as regards the verticality of the base.

3)   We designed and applied a rectangular archwire  .017 x .025 inch (without radius on its edge, although the minimum standard by DIN 13971 that is given to us is 0.03 mm ≃ 0.0012 mm! With that way the archwire fills the slot and can express maximum torque with only 1° of freedom!)

4)   We designed and applied a circular archwire 0.012 mm inch.

5)   We considered the applied forces required by the wires to move teeth had the rates of 50 gr, 150 gr and 250 gr.

6)   We designed a double curved slot (on a side cross and on a transverse cross) designed with circular radius ≃ 5 °.


Our purpose is to prove that we can reduce the sliding friction by changing some basic geometries in our construction.