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Frequently Asked Questions

Myofunctional Forces on the Dentition

Q - How much force does it take to move an anterior tooth?

A - Only 1.7gm of lip pressure above the resting values is necessary for moving teeth.1

Q - What force does the lip exert?

A - Labial pressure exerted against the lip bumper has been estimated to range between 100gm and 300gm.2

Q - What force is the tongue capable of exerting?

A - Most persons adopt a swallowing pattern in which the tip of the tongue is placed in the rougae area and a pressure of roughly 100gm per cm2 is exerted upward and backwards. In aberrant swallow a force of 500gm can be exerted against the anterior teeth.3

Q - What are the forces on the occlusion during swallowing?

A - Gibbs found forces during swallowing averaged 66.5 pounds which was substantially higher than 58.7 pounds during the occlusal phase of chewing.4

1. Weinstein S. - AJO 1967;53:881-903.
2 . Sakuda M. Ishizwa M. - J. Dent Res 1970; 49:677.
3 . Profit W.R. - Arch Oral Biol 1972;17:555-63.
4. Gibbs C.H, Mahan PE Brehnan K - J Pros Dent. 1981.

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Patent No. 5 259 762