<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec>
<h3>Objective</h3>
<p>To evaluate the frictional behaviour of orthodontic archwires in dry and wet conditions <italic>in-vitro</italic>.</p>
</sec>
<sec>
<h3>Methods</h3>
<p>Two types of archwire materials were investigated: stainless steel and NiTi. A fretting wear tribometer fitted with an alumina ball was operated at 23°C in three different environments: ambient air with 50 per cent relative humidity, 0.9 wt. per cent sodium chloride solution, and deionised water.</p>
</sec>
<sec>
<h3>Results</h3>
<p>NiTi archwires sliding against alumina exhibited high coefficients of friction (about 0.6) in the three environments. Stainless steel archwires sliding against alumina had relatively low coefficients of friction (0.3) in the solutions, but high coefficients (0.8) in air.</p>
</sec>
<sec>
<h3>Conclusion</h3>
<p>The low frictional forces of the stainless steel wires sliding against alumina in the solutions were due to a lubricating effect of the solutions and corrosion-wear debris. The high frictional forces between the NiTi wires and alumina are attributed to an abrasive interfacial transfer film between the wires and alumina.</p>
</sec>
</abstract>

Objective
To evaluate the frictional behaviour of orthodontic archwires in dry and wet conditions in-vitro.


Methods
Two types of archwire materials were investigated: stainless steel and NiTi. A fretting wear tribometer fitted with an alumina ball was operated at 23°C in three different environments: ambient air with 50 per cent relative humidity, 0.9 wt. per cent sodium chloride solution, and deionised water.


Results
NiTi archwires sliding against alumina exhibited high coefficients of friction (about 0.6) in the three environments. Stainless steel archwires sliding against alumina had relatively low coefficients of friction (0.3) in the solutions, but high coefficients (0.8) in air.


Conclusion
The low frictional forces of the stainless steel wires sliding against alumina in the solutions were due to a lubricating effect of the solutions and corrosion-wear debris. The high frictional forces between the NiTi wires and alumina are attributed to an abrasive interfacial transfer film between the wires and alumina.

Tribological behaviour of orthodontic archwires under dry and wet sliding conditions <italic>in-vitro.</italic> I - Frictional behaviour

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

Tribological behaviour of orthodontic archwires under dry and wet sliding conditions  I - Frictional behaviour

Objective
To evaluate the frictional behaviour of orthodontic archwires in dry and wet conditions in-vitro.


Methods
Two types of archwire materials were...

Tribological behaviour of orthodontic archwires under dry and wet sliding conditions in-vitro. I - Frictional behaviour

Pubblicato online: 13 dic 2023

Pagine: 11 - 19

Ricevuto: 01 ott 2005

Accettato: 01 mar 2006

DOI: https://doi.org/10.2478/aoj-2006-0002

© 2006 Abdenacer Berradja et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.