Comparison of Frictional Resistance in Different Orthodontic Wire and Bracket Combination

For orthodontic tooth movement to be effective, frictional resistance is essential. Treatment results are affected by the frictional forces, which are greatly influenced by the kind of wire and bracket combination. To identify the best orthodontic wire and bracket combination for reducing friction, this research compares the frictional resistance of many combinations.

A total of 120 samples were divided into six groups according to combinations of two wire kinds (nickel-titanium and stainless steel) and three bracket types (self-ligating, ceramic, and stainless steel). In a dry setting, slide mechanics was simulated using a specially designed testing equipment under a typical load of 150 g. A universal testing equipment was used to record the frictional resistance (in grams). To guarantee repeatability, the experiment was conducted three times with 20 samples in each group. ANOVA was used for statistical analysis, and a significance threshold of P < 0.05 was used.

The ceramic bracket with nickel-titanium wire had the maximum frictional resistance (mean: 400 g, SD: ±10 g), whereas the stainless steel bracket with stainless steel wire had the lowest frictional resistance (mean: 150 g, SD: ±5 g). For both wire types, self-ligating brackets showed a considerable level of frictional resistance (mean range: 200-250 g, SD: ±7 g). Differences across the groups were statistically significant (P < 0.01).

For effective orthodontic treatment, the stainless steel bracket and wire combination is a good option since it has the lowest frictional resistance. Ceramic brackets should be used carefully because of their greater levels of friction, while self-ligating brackets provide a balance between frictional resistance and simplicity of application.