Orthodontic Wire Selection — NDEB AFK MCQ

Instant feedback + full explanation. One question, done properly.

EasyOrthodonticsOrthodontic Wire SelectionNDEB AFK

Which orthodontic wire provides the lowest force delivery and is ideal for initial alignment in fixed appliance therapy?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — Nickel-titanium (NiTi)

Nickel-titanium (NiTi) wires deliver the lowest forces due to their superelastic properties (shape memory) and low modulus of elasticity. They can be deflected large distances and return to their original shape, delivering light, continuous forces ideal for initial alignment of severely crowded or malposed teeth. Stainless steel has a high modulus and delivers high forces. Beta-titanium (TMA) has intermediate properties and is used for intermediate/finishing stages.

Reference: Proffit – Contemporary Orthodontics, 6th ed., 2019