The large teeth at the very back may be second or third molars i.e. wisdom teeth. If they are second molars, extraction is usually not recommended, if they are third molars, extraction is usually recommended as follows.
1. Second molar: the second molar plays a very important role in the oral cavity, and its extraction will affect the efficiency of chewing. If caries, pulpitis or other diseases have occurred in the second molar, it can be treated by preserving the tooth tissue or restoring the shape of the tooth in order to preserve the chewing function of the second molar.
2. Third molar: The third molar is often obstructed or ectopic eruption, which may lead to diseases or symptoms such as pericoronitis of wisdom teeth, caries of neighboring teeth, root resorption of neighboring teeth, food impaction, etc. It is recommended to extract it in order to prevent the occurrence and development of diseases.
It is recommended to visit a hospital for professional treatment.