Align Technology, Inc.
The purpose of this study is to compare expansion result and the overall experience between the Invisalign Palatal Expander and the Hyrax expander.
Inclusion Criteria: * Subject ages 6-11 years old * Subject must need maxillary expansion * Subjects must have erupted dentition in the area of the primary molars or permanent premolars and the first permanent molar Exclusion Criteria: * Subjects with palatal exostosis/surface aberration/ cleft palate * Subject's dentition not compatible with device or allergy to device materials * Subject with active caries, periodontal disease, TMD
Removable palatal expander where expanders are changed to obtain up to .25mm expansion per expander
Palatal expander cemented into mouth where a screw is turned to obtain .25mm expansion per turn
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