Root canal treatment does not necessarily necessitate the wearing of a crown, determined by the location and extent of the tooth defect. Root canal treatment includes root canal preparation, root canal disinfection, root canal filling, etc. Commonly used medications after root canal preparation are camphorated phenol, eugenol, etc.; commonly used medications for root canal disinfection are formaldehyde cresol, iodine imitation, etc.; commonly used medications for root canal filling are root canal paste with silver tip and gum tip, etc. 1. Without crown: the tooth is missing less, after root canal treatment the remaining tooth supportive tissue is more, after root canal treatment can not do the crown, but do not use the affected tooth to eat too hard food, in order to prevent the tooth from splitting. 2. Wearing crowns: It is better to wear crowns after root canal treatment for the front teeth, as there is no nutrient supply after root canal treatment, the crowns will be blackened, wearing crowns can make the front teeth back to beautiful; crowns for the back teeth can better play the function of mastication and prevent the teeth from splitting. Whether you need to wear a crown after root canal treatment, it is best to go to the hospital in time and listen to the advice of a professional physician, which can effectively avoid tooth splitting and so on.