The difference between tetracycline teeth and yellow teeth is as follows: 1, tetracycline teeth will show yellow teeth, because tetracycline teeth are produced due to some antibiotic drugs during the development of teeth, such as tetracycline lead to yellow changes in the dentin of the teeth, that is, the deep part of the teeth, serious cases produce light brown, dark brown changes; 2, yellow teeth are produced by a number of reasons is the patient some ageing changes, such as patients with age But this yellowing is generally a phenomenon that occurs during the development of the normal physiological structure of the human body, while the color of tetracycline teeth is beyond the normal color, will be shown as light brown, dark brown, and even with the growth of age, the color will become darker and darker. Patients who experience age-related changes that lead to yellowing of the teeth can maintain very good results by whitening, such as whitening devices or home whitening.