What is a key factor in choosing between fixed and removable appliances?

The key factor in choosing between fixed and removable appliances is the desired level of control and predictability of tooth movement. Fixed appliances, such as braces, are bonded directly to the teeth, allowing for continuous force application, which enables orthodontists to have more control over tooth movement. This can lead to more predictable outcomes in complex cases or when significant movement is required.

On the other hand, removable appliances rely on patient compliance, meaning that their effectiveness can vary based on how consistently they are worn. While they offer more comfort and flexibility, their predictability is generally lower than that of fixed appliances. Therefore, when precise and controlled movement is essential, fixed appliances are often the preferred choice, emphasizing the importance of control and predictability in orthodontic treatment planning.