Orthodontic Assistant Practice Exam

What type of wire is most commonly used to control torque in orthodontic treatments?

1. Aluminum wire

2. Braided wire

3. Nickel-titanium wire

4. Stainless steel wire

The correct answer is: Stainless steel wire

In orthodontic treatments, the most commonly used wire to control torque is stainless steel wire. This type of wire has superior strength and rigidity, allowing it to maintain its shape and resist deformation during the application of forces. Stainless steel is highly effective in producing the necessary tooth movements, particularly in managing the torque component, which is essential for proper root positioning in the alveolar bone. The other options do not serve the same purpose as effectively as stainless steel. Aluminum wire, while lightweight, lacks the strength required for effective torque control. Braided wire can be used in certain instances but is primarily beneficial for elastic properties rather than precise torque adjustments. Nickel-titanium wire is excellent for its flexibility and shape memory, making it useful for initial stages of treatment; however, it is not as effective for torque control compared to stainless steel. Overall, stainless steel wire’s properties make it the optimal choice for controlling torque in orthodontic applications, ensuring that orthodontists can achieve the desired alignment and positioning of the teeth.