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2019 Annual Session Conference

Expansion in the Early Mixed Dentition: Is It Worth the Effort?

May 7, 2019 8:35am ‐ May 7, 2019 9:05am


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.

Learning Objectives:

  • 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.


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