A palatal expander, also known as a rapid maxillary expander (RME) or orthodontic expander, is a dental device used in orthodontic treatment to widen the upper jaw (maxilla). It is primarily employed to correct issues related to narrow dental arches and create more space for crowded teeth. Here's an in-depth explanation of how a palatal expander works and when it is used in orthodontic treatment:
How a Palatal Expander Works:
1. Device Construction:
- A palatal expander consists of two halves that are attached to the upper molars via bands or orthodontic cement.
- The two halves are connected by a screw mechanism located in the midline of the palate (roof of the mouth).
2. Activation:
- The orthodontist or patient (under professional guidance) uses a key to turn the screw, activating the expander.
- As the screw is turned, the two halves of the expander move apart slightly.
3. Tissue Adaptation:
- The expanding action applies gentle, control....
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