OBJECTIVETo investigate the accurate and individual treatment of temporomandibular joint(TMJ) injury based on 3D digital technology.

METHODSMaxillo-mandibular model was made using rapid prototyping technology based on the pre-operation 3D CT results. According to the 3D digital measurement results, TMJ concepts were ordered and the prosthesis was used to simulate the replacement surgery on the model. Then the joint replacement surgery was performed afterward.

RESULTS(1)After total replacement of TMJ, no pain happened and mouth open was not limited. Three months later, the joint position was normal and stable. The month open width was 4 cm. (2)After condyle replacement, primary healing was achieved with complete survival of bone graft. No edema was seen. Symmetric facial appearance was satisfactory.

CONCLUSIONSBilateral individual prosthesis for total TMJ or condyle replacement is an ideal method for TMJ injury.

Arthroplasty, Replacement ; methods ; Bone Transplantation ; Computer-Aided Design ; Humans ; Imaging, Three-Dimensional ; methods ; Joint Prosthesis ; Mandible ; Prosthesis Design ; methods ; Range of Motion, Articular ; Temporomandibular Joint ; anatomy & histology ; injuries

Oral and maxillofacial malignant tumors threaten the life and health of patients, and seriously affect their swallowing, language function and face. 125I seeds brachytherapy for oral and maxillofacial malignant tumors has been widely concerned and studied because of its advantages such as less surgical trauma, large and uniform dose distribution in the target tissue, little damage to the surrounding normal tissue, and reducing radiation exposure of medical staff. Low-dose brachytherapy with 125I seeds can effectively reduce the tumor volume and prolong the survival time of patients. This article reviews the clinical application of 125I seeds brachytherapy in oral and maxillofacial malignant tumors.