Too many teeth
Introduction
Introduction The number of normal human teeth is 20 deciduous teeth and 28-32 permanent teeth. The abnormal number of teeth is manifested by insufficient or excessive number of teeth. There are many more teeth (also known as extra teeth) and dental tumors.
Cause
Cause
Causes of excessive tooth count
Extra teeth or edema are thought to be caused by hyperproliferation of epithelial cells during tooth germogenesis, which causes the teeth to differentiate into excessive buds. Or when the dental plate is broken, the residual epithelial cells proliferate and are more common in male children.
Examine
an examination
Related inspection
Oral endoscopic oral X-ray examination
Excessive inspection of the number of teeth
(1) Multiple teeth
The occurrence of multiple teeth in the deciduous column is less common, and is more common in mixed dentitions and permanent dentition. The most common site of multiple teeth is in the maxillary anterior region. Between 3%. At different stages of the dentition, the order of multiple teeth occurs: mixed dentition > permanent dentition > deciduous dentition. More men than women. According to the literature, the ratio of male to female is 5.4:1.
Most of the prosthetic teeth erupted into the mouth, but also remained in the jaw bone, about 1/4 of which was still in the jaw bone without eruption. The presence of multiple teeth mainly caused various pathological disorders in the development of permanent dentition. : Causes delayed growth of permanent teeth, gap between teeth, dislocation of teeth, twisting of adjacent teeth, occasional fusion with normal teeth or causing tooth cysts, and even absorption of adjacent roots; some inverted multi-dental teeth enter the nasal cavity, etc. There are no complications associated with the above. However, their unsightly appearance in the dentition or outside the dentition is of concern to parents and doctors.
(2) Dental disease (odontoma):
It is rare in clinical practice and is a calcified mass composed of enamel, dentin and pulp tissue.
Classification of dental tumors:
(1) complex odontoma: a circular or elliptical calcified mass, without the anatomy of the teeth, but a cluster of disordered dental tissue.
(2) compound odontoma (compound odontoma): is composed of enamel, dentin and pulp tissue, some of which are similar in size to cones or curved and non-shaped teeth, which can be several or even Dozens.
Clinical manifestations: The age of the tumor is 10-20 years old, the prosthesis area is the maxillary anterior region, followed by the mandibular anterior region and the molar area. Most of the cavities remain small and asymptomatic, often in X It was discovered during line examination. Some dental tumors were found to hinder the eruption of normal teeth. Some were found due to bone swelling and obvious facial swelling of the jaw. This condition is more common in mixed dental tumors. X-ray diagnosis of simple dental tumor is not difficult, because it is composed of some small teeth. The X-ray diagnosis of mixed dental tumor has certain difficulties, especially in young children, the growth of dental tumor tissue, X Line lesions are predominantly transmissive and have calcifications, similar to ameloblastic fibroids, hypercalcified glandular ameloblastomas, and osteomas, which are difficult to distinguish. They must be resolved by histological examination.
Diagnosis
Differential diagnosis
Symptoms of excessive number of teeth
Abnormal dental morphology: including curved teeth, deformed teeth, deformed tongue, deformed tongue, deformed central teeth, oversized teeth, too small teeth.
Abnormal tooth structure: more common enamel hypoplasia, tetracycline stained teeth, dentin dysplasia.
Abnormal teeth eruption: more common in permanent teeth. Including early teeth, late teeth, teeth ectopic eruption.
