What is a potential side effect of Rapid Maxillary Expansion (RME)?

Diastema formation is a recognized potential side effect of Rapid Maxillary Expansion (RME). During the RME process, the maxilla is physically separated at the mid-palatal suture in order to widen the dental arch. This increased space can lead to the teeth drifting apart, particularly the anterior teeth, resulting in gaps or diastemas.

The RME procedure can also influence the positioning of the teeth, and in some cases, it may provoke movement that causes spacing between teeth. This type of tooth movement is especially prominent in the anterior region, where the expansion occurs.

Other factors that can contribute to diastema formation include the individual’s existing dental arch shape, the timing of treatment, and the amount of expansion achieved. While RME is typically used to improve occlusion and create space for crowded teeth, unintended gaps may surface as a side effect if not properly monitored.