These devices serve several purposes, including:

• Correcting Jaw Narrowness:
     - Jaw expanders are used to widen narrow dental arches, helping to improve the alignment of teeth.
  
  
• Improving Facial Balance:
     - In some cases, jaw expanders are employed to achieve better balance between the size of the jaws and facial structure.
  
  
• Preparation for Orthodontic Treatment:
     - Jaw expanders may be used as part of preparing the jaws before initiating orthodontic treatment, such as wearing braces.
  
  
• Enhancing Nasal Ventilation:
   - In certain situations, jaw expanders can be used to improve nasal ventilation.
  
  
• Treatment of Sleep Disorders:
     - Expanding the jaws can be part of the treatment for sleep disorders such as snoring and breathing cessation during sleep.
  
  The types of jaw expanders, methods of use, and selection of the optimal type depend on the patient's needs and the diagnosis of the dentist specializing in dentistry.