What is an advantage of self-ligating brackets?

• A. Reduction of friction
• B. Faster treatment
• C. Improved aesthetics
• D. Compatibility with elastics

Answer: (A)

Friction at the bracket–wire interface governs how easily the archwire can slide and move teeth. Self-ligating brackets have a built‑in clip or gate that holds the wire without elastic ligatures, which reduces contact friction between the wire and bracket. With less friction, the archwire can slide more freely, allowing tooth movement with less resistance and smoother mechanics. This direct reduction in friction is the primary advantage. While faster treatment and easier ligation are discussed benefits in practice, the key mechanism is reduced friction. Aesthetics depend on material and design and are not guaranteed to be improved across all self-ligating systems, and elastics can still be used with these brackets, so compatibility with elastics is not unique to them.