Tribological properties of deflected NiTi superelastic archwire using a new experimental set-up: Stress-induced martensitic transformation effect

Laser surface textures enhance the friction and wear behaviour of orthodontic brackets

“…Prior to the friction test, all the archwires and brackets were sequentially rinsed with acetone, ethanol as well as deionised water by using an ultrasonic cleaner (M2800-C, Branson, China). To retain the constant and reliable tribological parameters during the friction test, the archwire was carefully aligned to the bracket slots and tensioned with a predefined value of 10 N. 32 A normal load of 1.0 N, similar to the actual force magnitude of the archwires during the orthodontic treatment, 33,34 was exerted on the archwire-bracket contact combination. The theoretical contact pressure of the archwirebracket sliding contact was calculated to be 1.2 MPa.…”

A review of advances in tribology in 2020–2021

“…Such a significant difference cannot be attributed only to the relatively small difference in hardness (H) or H/E ratios (E 1⁄4 elastic modulus) of the materials but, rather, to a difference in strain energy, which dissipates in the material and results from normal load of the sliding ball. NiTi superelastic archwire was used as the counterpart of a disc in a tribometer under the actual force magnitudes that the archwire receives during treatment and for different stress levels [585]. The results showed that the martensitic transformation induced by stress caused an increase in the coefficient of friction and in the wear rate by 50% and 30% respectively compared to the non-bent archwire.…”