After a root canal treatment, wearing a dental appliance such as a dental crown or orthodontic braces may be recommended to protect the tooth from external forces, depending on the location of the treated tooth and the extent of the damage. Generally, if the treated tooth is a premolar or molar, wearing a dental appliance is recommended as studies have shown that over half of patients who do not wear a dental appliance after root canal treatment may experience tooth fracture within three years. However, some patients may not need to wear a dental appliance after root canal treatment, such as those who have had the treatment on a front tooth, with a small surgical area and no significant decay or damage to the tooth. The decision about whether to wear a dental appliance after root canal treatment should be made on a case-by-case basis, in consultation with the dentist.