Before orthodontic treatment, a series of examinations are required, and the doctor can develop a customized orthodontic treatment plan for the patient based on the accurate information obtained from these examinations, and since the examination process is tedious, we will introduce it for you now so that you can have a clear idea in your mind when receiving treatment. (1) First of all, patients need to undergo oral and facial examination: including facial symmetry, proportional coordination of various parts, upper and lower lip protrusion, chin and chin development, teeth alignment, upper and lower teeth convexity, upper and lower teeth bite relationship, etc., as well as temporomandibular joint palpation and movement examination. At this time, we will find out the problems of the face, teeth and TMJ. (2) Take oral CBCT or oral panoramic film, lateral cranial film and TMJ film: These X-rays are taken mainly to allow us to see skeletal problems that are invisible to the naked eye, and to quantify dental abnormalities and facial soft tissue bone tissue problems through precise measurements, so that the doctor knows the severity of facial, dental, and TMJ problems; (3) Take impressions Infusion of a mnemonic plaster model: This process is designed to replicate exactly the condition of the teeth in the mouth with a plaster model, and its purpose is also to facilitate the doctor to be able to quantify the problems that exist in the teeth by measurement. (4) Taking occlusal photographs of the teeth with a professional camera: 5 ortho-, left-, right-, and maxillary and mandibular portraits of the patient in the occlusal state and 4 facial photographs of the face in frontal, smiling, 45-degree lateral, and 90-degree lateral positions are required; in order to show the patient’s situation in the oral cavity as comprehensively as possible.