Toothy

Introduction Tooth decay, also known as tooth decay, is a cosmetic feature, also known as the maxillary protrusion, the deformity of the bird's beak, and the deformity of the jaw. It means that the upper and lower incisors and the upper and lower jaws protrude forward. In the relaxed state, the upper and lower lips are not naturally closed, and the gums are exposed a lot when laughing. The open lip is exposed from the front, and the nasolabial groove is deep. The contour of the face is viewed from the side to protrude excessively forward from the lip to form a shape. Severe cases appear dark, yellow or even chapped due to long-term exposure of the teeth.

Cause

The etiology and pathogenesis of "tooth decay" have not yet been elucidated, and may have congenital genetic factors and acquired bad habits. The disease has obvious ethnic onset characteristics and family aggregation tendency; but acquired bad habits such as mouth breathing, tongue exudation, biting lower lip and adult sucking habits may also be the cause of the disease. However, childhood is not obvious, adolescence begins to manifest, and adulthood is basically stable. After middle age, the ablation of soft tissue is often more pronounced.

an examination

Related inspection

Dental pulp electrical activity determination of pulp temperature test (cold fever diagnosis)

1. The upper and lower incisors and the upper and lower jaws protrude forward. In the relaxed state, the upper and lower lips can not be closed naturally. When the smile is large, the gums are exposed.

2. The open lip is exposed from the front, and the nasolabial fold is deep. The contour of the face is viewed from the side to protrude excessively forward from the lip to form a ">" shape.

3, severe cases due to long-term exposure of the teeth appear black, yellow or even chapped.

Differential diagnosis

Identification:

Exposed roots: Exposed roots, mainly refers to the phenomenon of atrophy of the gums, while the teeth become larger, the teeth become longer and the teeth are loose. The roots of the teeth are exposed, and the atrophy of the gums often makes the exposed teeth extremely sensitive to temperature changes and acidic foods, and often causes irritation.

The occlusion relationship is disordered: the occlusal relationship between the upper and lower teeth is often disturbed by the displacement of the jaw fracture segment, which is the most obvious symptom of the jaw fracture, and is of great significance for the diagnosis of jaw fracture. The mandibular transverse fracture, the fracture segment is displaced downward, so that the maxillary posterior teeth and the mandibular posterior teeth are in early contact, so that the anterior teeth are in an open occlusion state. After the mandibular fracture, due to the displacement of the fracture segment, the occlusal relationship of the teeth is disordered. If there is no displacement of the fracture segment, there is no obvious confusion in the tooth occlusion.

Abnormal tooth structure: refers to the abnormal development of teeth caused by various obstacles during tooth matrix formation or matrix calcification during tooth development, and leaves permanent defects or marks on the tooth tissue.

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