Comparison of skeletal and dental effects of two different tooth-tissue-borne types of rapid maxillary expansion appliances: A CBCT retrospective study.

Expansion in the palatal region on the alveolar level was higher in MNR than in FCR, while expansion in FCR was the highest in the posterior. In both appliances, there was tipping in the buccal direction in both alveolar bone and teeth, and the rate of this tipping was higher in MNR.