Clinical manifestations: 1. Expansion of jaw bone and facial deformation: the onset of jaw bone is more than that of maxilla, which is more likely to occur in the molar area and jaw angle. 2.The tumor may cause tooth loosening, resorption and displacement when it affects the alveolar bone. 3.Numbness and discomfort of lower lip: this symptom will appear when the tumor presses the lower alveolar nerve or when the tumor becomes malignant (the incidence is very low). 4.Pathological fracture may occur when there is much bone destruction. 5. Enamel cell tumor of maxillary bone may spread to maxillary sinus, nasal cavity and orbit, and corresponding nasal congestion, supraorbital shift and nasolacrimal duct obstruction may occur. Diagnosis: 1. Painless progressive enlargement of the jaws, which may lead to facial deformity, often without special conscious symptoms. 2, misalignment of the bite, displacement and loosening or loss of teeth, and occasionally pathological fractures. 3.The jaw bone is enlarged, with nodular and uneven surface, sometimes accompanied by ping-pong ball-like pressure and elasticity. 4.X-ray shows enlarged jawbone, irregular multi-room cystic translucent image, the edge of this image is not smooth, there is a half-moon cut, the size of the compartment is different, and if it affects the alveolar bone, there may be obvious “apical infiltration sign” – the root tip of the alveolar process bone is irregularly destroyed and resorption, the root may be serrated or truncated resorption. 5, such as rapid growth with painful ulcers and other symptoms, x-ray performance of bone septal destruction disappeared, a speckled shadow, should be suspected of malignant changes. 6.The puncture cyst fluid is often brown, sometimes there can be cholesterol crystals, but no keratinized epithelium. 7, pathological histological examination to confirm the diagnosis. Treatment: Surgical treatment should be performed according to the principle of treatment of adventitia, that is, the whole tumor should be removed at about 0.5cm outside the tumor. Enamel cell tumor of jaw bone is a kind of benign tumor, but because it has the characteristic of local infiltrative growth, and a few of them may become malignant when the tumor survives for a long time or is not properly treated for a long time, it is a kind of critical tumor (i.e. a tumor between malignant tumor and benign tumor), so once the diagnosis of this disease is established, it should be treated by surgery as soon as possible, because the tumor will gradually increase in size with time, which will cause more tissue defects and dysfunction. If it occurs in the maxilla, it can also invade the skull base, which makes it difficult to be cut cleanly by surgery. The masticatory function can also be restored by dental implants after autologous bone grafting of mandibular defects.