A too low resting position of the tongue is decisive for the shape of the upper jaw and thus the entire face. In many cases it will lead to a narrow palatum. A low tongue position is often caused by a too short or too stiff tongue tie (frenulum). Sometimes the bottom of the mouth on which the tongue tie is attached can be slightly stretched, but usually the tongue tie must be corrected by cutting, lasering or cleaving. Pediatrician Lawrence Kotlow has classified length measurements for the tongue tie, which can be used to determine whether intervention is necessary. These guidelines are known as the Kotlow classification.


Determination of the Kotlow classification

OMFT.eu has developed a measurement instrument on the basis of the guidelines of Lawrence Kotlow. A handy and factually indispensable tool to determine if correction of the tongue tie is necessary. To determine the Kotlow classification, hold the client’s tongue back with a groove director or with a Liper device and tighten the tongue tie. Then you take one of the Kotlow rulers, which you then keep parallel to the tongue tie. Place the end of the ruler between the thickening that is visible on the tongue tie near the bottom of the mouth (the salvia caruncles) and where the top of the tongue tie is attached to the tongue. Find the ruler that fits exactly. The ruler indicates which Kotlow classification is used.



After the tongue tie is corrected, the place where the tongue tie was situated should be massaged regularly to prevent adhesion of the wound edges. With a Liper device, someone can easily do this to the client.



All the instruments described above, are available in our webshop.




Groove director


Liper device


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