A study of frictional resistance generated from different leveling arch wires through self-ligating speed brackets in the dry state

Document Type : Original Article

Authors

1 Department of Orthodontics, Faculty of Dental Medicine, Girls Branch, Al Azhar University, Cairo, Egypt

2 Department of Orthodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt

Abstract

The frictional resistance (FR) of the speed brackets was studied among different types of leveling arch wires of 0.014" gauge including, plane stainless steel (S.S.), S.S. with vertical loop, multistranded and nitinol arch wires. These arch wires were configurated into a simulated U-shaped arch form to be fitted into a dental arch mould carrying a full upper set of the tested bracket under the dry state. Ten arch wires of each group were tested using the Universal Testing Machine. The statistical analysis showed that there was a statistically significant difference among the tested group. (SS.) with vertical loop arch wire showed the least amount of (FR) followed by Plane (S.S.), then multi stranded arch wire and lastly nitinol arch wire showed the highest (FR).