What is the primary purpose of an activator in orthodontic treatment?

The primary purpose of an activator in orthodontic treatment is to widen the maxillary arch, making it the most appropriate choice. Activators are removable orthodontic devices primarily used in growing patients. They work by utilizing the natural growth of the jaw and can promote the widening of the upper dental arch. This process can help create more space for properly aligning the teeth and can also aid in correcting bite issues, particularly in cases where the maxilla (upper jaw) is too narrow.

In contrast, while correcting an overbite, reducing gum inflammation, or straightening teeth are important aspects of orthodontic treatment, they are not specifically the primary function of an activator. Each of these goals may require different appliances or treatments. For instance, correcting an overbite may be addressed with other types of orthodontic appliances or techniques, and straightening teeth often involves braces or aligners, rather than activators, which focus on arch development. Reducing gum inflammation pertains more to periodontal care and health rather than the corrective orthodontic function of activators. Thus, the activator's primary role distinctly centers around arch expansion.