30 Balcombe Rd, Mentone VIC 3194

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(03) 9583 1654 

Mon – Fri  09:00AM – 17:30PM

Sat   08:30AM – 13:00PM

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© 2020 Rien Dental. Created by Dr Changjie Guo

Disclaimer: Any surgical or invasive procedure carries risks. Before proceeding you should seek a second opinion from an appropriately qualified health practitioner.

RPE - Rapid Palatal Expander


A Rapid Palatal Expander (RPE) is an orthodontic appliance that puts pressure on the upper jaw (maxilla) to separate the mid palatal suture by turning a midline screw.  It makes the maxilla wider and creat space.  RPEs are used often to correct posterior crossbites.


This procedure is better to be done at a younger age before the palatal suture becomes fused. With adults, Surgically Assisted Rapid Palatal Expander (SARPE) is needed, which combines an RPE and surgery performed by an oral surgeon. 



A key with a plastic handle is used to turn the midline screw. Instructions are given to a parent, guardian or other person to activate an RPE.


Usually a patient will turn the expander once or twice a day for many days untill the crossbite is eliminated.




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