Maxillary Skeletal Expander

MSE Lab Works

1. MSE Position: Posterior Palatal Vault Between 1st and  2nd Molars in Order to Direct the Expansion Force Against the Buttress Bones.
2. MSE Should Be Positioned Slightly Anterior to the Soft Palate


  • Vertical Control in High Angle Cases
  • Significant Increase in Upper Airway Volume: Nasal Obstruction, Sleep Apnea
  • Mostly Skeletal Expansion: Less Bone Bending and Dental Tipping Compared to RPE and SARPE
  • Less Invasive than SARPE and Orthognathic Surgery
  • FM and MSE for Class III Correction
  • MSE Causes Expansion of the Surrounding Structures
  • MSE Can Be Used for Mature Patients


  • Extremely narrow palatal vault
  • Patients with previous mid-facial trauma
  • Extremely thick/dense palatal bone and/or dense buttress bone
  • Extremely thin palate with low bone density