Abstract
A new cast-metal-type splint expander was used to treat severe maxillary constriction. This new appliance has the same advantages of a rapid expander on acrylic splints, compared to a Haas or to a banded expander. Furthermore, it is characterized by greater respect for the gingival tissue, both during the therapy and immediately after the removal of the expander. It is also more comfortable for the patient, so that it is possible to maintain the expander in the mouth for several months without gingival suffering. This appliance is very versatile and well indicated for permanent, mixed and deciduous dentitions.
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