Floor covering is a kind of abnormal tooth development, that is, anterior crossbite, commonly known as "floor covering", which means that the lower anterior crossbite is normal, or the number of crossbite is small.

The ground is called "anterior crossbite" in medicine. Anterior crossbite is a bad oral habit, which has great influence on oral health, growth and development and general health.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Patients in the plot often have mandibular protrusion, lower dental arch protrusion, lower dental arch stenosis and mandibular dysplasia, and the size of mandibular arch is different from that of maxillary arch.

Mandibular protrusion and lower teeth often appear in patients with land parcels.