Orthodontic and orthopedic expansion in 7-9 year old patients has been used has been used routinely by the speaker for nearly four decades. Several prospective clinical studies have been conducted that have evaluated the short-term and long-term treatment effects produced by expansion with the bonded acrylic splint expander with or without prior orthodontic expansion of the lower arch by way of a removable Schwarz appliance. Long-term changes in arch width, arch perimeter and intercanine distance will be compared to those occurring in untreated subjects, providing a realistic view of what can be accomplished by expanding in the early mixed dentition.
Identify the basic protocols for the removable Schwarz appliance and the bonded acrylic splint expander.
Evaluate the short-term treatment effects of this early expansion protocol.
Evaluate the long-term outcome of expansion in comparison to untreated subjects.