Correction of Unilateral Posterior Crossbite with U-MARPE

Turk J Orthod. 2020 Jul 20;33(3):192-196. doi: 10.5152/TurkJOrthod.2020.20034. eCollection 2020 Sep.


Unilateral posterior crossbite typically presents as a narrow maxillary arch and a broad mandibular arch on the side of the crossbite. Unwanted overexpansion and iatrogenic crossbite may develop as side effects if conventional rapid maxillary expansion is done in such cases. Thus, unilateral expansion of the maxilla with unilateral posterior crossbite can help us avoid these side effects and improve the transverse relationship between the maxillary and mandibular posterior dentition on the affected side only. In this case report, we describe a mini-implant-supported unilateral expansion of the maxillary arch in a patient with a unilateral posterior crossbite.

Keywords: Asymmetry; mini-implant; unilateral crossbite; unilateral expansion.

Publication types

  • Case Reports