Short-term Stability of Tooth-borne vs Bone-borne Maxillary Expansion: A Parallel Cohort Study

"At the end of the planned expansion, an 8-month retention period was expected. At this time, the expansion device was removed, and impressions were taken in both groups (T1).~At 12-month follow-up (T2), new impressions were taken in both groups to evaluate, at dental level, the relapse in the short term. Fig 1"

tooth-borne expander delivery.

Insertion of the paramedian miniscrews in a totally guided procedure, and after was delivered the tooth-borne expander