What is osteochondrodysplasia: Osteochondrodysplasia, also known as osteogenesis imperfecta, is a common benign lesion of bone tissue in the craniomaxillofacial region, which is characterized by the gradual expansion and enlargement of osteogenic fibrous tissue and invasion of adjacent normal bone tissue. The exact incidence is not known, but the literature reports that it accounts for 2.5-10% of all bone tumors. Although it is a benign lesion, the number and location of the lesions vary, and the damage caused to the patient varies. In addition to deformation and distortion of the face, craniomaxillofacial fibrodysplasia can also cause damage to vision and change in the position of the eye due to the swelling of the orbital area and damage to the occlusal function of the upper and lower jaws. Classification and clinical manifestations of craniomaxillofacial anomalous proliferation disease: Briefly, according to the number of lesions occurring, craniomaxillofacial anomalous proliferation disease can be divided into single bone type and multiple bone type. The former mainly shows the involvement of a single bone and the lesions are relatively limited, while the latter shows the involvement of multiple bones in the craniofacial area and the lesions are extensive. The cause of craniomaxillofacial anomalous accretion usually develops around the age of 10 and continues throughout adolescence. The clinical manifestations vary depending on the number and location of the affected bones. The main manifestation is the slow expansion of the affected bones in the craniofacial area, resulting in facial asymmetry or distortion, such as hemifacial hypertrophy, alveolar hypertrophy and deformation, mandibular deviation, etc. In the case of orbital involvement, eye protrusion may occur, and in the case of cranial involvement, local expansion of the forehead and skull roof may occur. Treatment of craniomaxillofacial bone fiber abnormal proliferation disease: The surgical treatment of craniomaxillofacial bone fiber abnormal proliferation disease can be divided into two main types: 1.Local cutting and shaping of lesioned bones: It is suitable for those who have extensive lesions or lesions involving important structures that cannot be radically removed. The main advantage of this method is that the surgery is relatively easy to perform. The main advantage of this method is that the surgery is relatively simple, less invasive and does not require bone grafting. The disadvantage is that the treatment is not complete and is palliative and conservative, and there is a possibility of recurrence after surgery. Sometimes, cutting and shaping alone cannot achieve the ideal cosmetic effect, and need to be applied in combination with other techniques. (1) and the combination of aesthetic contouring techniques. For example, if the abnormal proliferation of bone in the middle part of the face occurs in the orbito-zygomatic maxillary area, while orbito-zygomatic cutting and orbital enlargement are performed to correct the local protrusion and protrusion of the eye, in order to avoid insufficient correction of the width of the middle part of the face, lateral protrusion can be corrected by osteotomy and reduction of the affected zygomatic bone at the same time. (2) Combination with orthognathic surgical techniques. Abnormal proliferation of maxillary or mandibular fibers can sometimes cause facial deviation and tilting of the occlusal plane. While performing lesion cutting, maxillary and mandibular osteotomy can be performed using orthognathic surgical techniques to adjust the occlusal plane, and if necessary, chin osteotomy can be added to correct chin deviation, which can significantly improve the overall postoperative effect. 2. Radical resection of the lesion, while using autologous bone or bone biological substitutes for repair and reconstruction. With the improvement of surgical techniques and related technology, this method has now gradually been accepted by most scholars and has significantly improved the surgical results. For single bone type lesions in non-essential functional areas, this method can be used for complete resection, and the following methods can be used for repair and reconstruction: (1) Autologous bone repair free graft. According to the size and morphology of the defect, autologous cranial outer plate, iliac bone, mandibular outer plate, etc. can be used to repair the bone defect after resection of the lesion by free grafting after shaping and reconstructing the morphology of the craniofacial area. (2) Bone flap graft with anastomosis of blood vessels. For upper and lower alveolar bone deformities that are severely deformed and distorted and cannot retain function, the deformed bone segment can be removed in stages and the bone defect can be repaired by using free fibula or iliac bone flap anastomosed with blood vessels to reconstruct the continuity of the jaw bone, and dental implants can be restored on the transplanted bone flap in the second stage to restore the occlusal function. (3) Biomaterial restoration. According to the area where the lesion is to be removed, 3D CT data are collected before surgery and personalized restorations are prefabricated, and after the lesion is removed, the prefabricated restorative material is placed, which can greatly improve the accuracy of the restoration. The main advantage of the above method is that the treatment is more thorough, less prone to recurrence, and in some special areas, the results are better than traditional cutting. The disadvantage is that the surgery is relatively complex and requires high requirements for the surgeon and hospital conditions and equipment. 3, the treatment of craniomaxillofacial bone fiber abnormal proliferation disease is a more complex work, requiring the integrated use of craniomaxillofacial related surgical techniques, and closely integrated with modern technology, such as computer-aided digital surgical techniques, including diagnosis, preoperative design, surgical simulation, intraoperative computer navigation, etc., in order to achieve good surgical results. Since each individual has a different site of disease, a different number of affected bones, a different degree of deformity, and different individual physical conditions and requirements, the selection of individualized treatment plans is particularly important. For patients with multiple bones, a combination of the above methods can be used to achieve maximum improvement in shape and restore function.