The force of the tongue against the teeth is an important factor in contributing to malformation (“bad bites”). In the United States, 20 to 80 percent of orthodontic patients exhibit some form of tongue thrust. The fact that a significant number of school-age children have tongue thrust has been noted by specialists.įor example, recent literature reports that as many as 67 to 95 percent of five- to eight-year-old children exhibit a tongue thrust that may be associated with, or contribute to, an orthodontic or speech problem. The term “tongue thrust” has been described and discussed in speech and dental publications since 1958 by many writers. The closed-bite thrust is typically a double protrusion.
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