34 years old can do orthodontic treatment, orthodontic treatment has no age limit, as long as the patient’s periodontal health, alveolar bone has no obvious atrophy, and the root of the tooth is not loose, can receive orthodontic treatment. 34 years old age patients, jaw growth and development has been completed, the teeth are slow to move, the alveolar bone is not active in the modification of the orthodontic force needs to be adjusted, to avoid too much traction caused by the root of the tooth resorption, tooth looseness, etc.. When the teeth of a few patients show obvious wear, appropriate jaw adjustment can be carried out to prevent jaw interference from occurring, resulting in temporomandibular joint dysfunction. The patient’s compliance is high, and can cooperate with the doctor to carry out good oral hygiene and cleaning to reduce the retention of dental plaque and prevent the formation of caries.