There is no authoritative information about the harm of dental fillings braces, usually there is no harm, but some patients may have pain, allergies, interference with speech and so on. 1. Dental fillings are mainly used to repair the tooth tissue defects, at present, there is no relevant authoritative information on the harm of dental fillings braces. Usually, dental filling braces are not harmful to teeth, however, some patients may experience pain in the period of time before wearing braces after dental filling, especially after experiencing hot and cold stimulation, there will be obvious soreness. 2. Secondly, some patients may be allergic to the material of braces, such as silver amalgam, glass ions, etc., followed by itching, redness and swelling and other discomfort. Besides, wearing braces after filling may interfere with speech to a certain extent and affect pronunciation. In addition, if patients wear braces incorrectly, they may cause wear and tear on their teeth. All in all, patients wearing braces after fillings need to visit the hospital for follow-up appointments on time and strengthen their daily life management, so that the doctor can easily understand the specific conditions of the teeth after the operation.