If the last big tooth is extracted, it is OK if it is the third molar (wisdom tooth) without implant, if it is the second molar, it needs to be implanted or take other ways to install the denture. 1. If the last big tooth is the third molar, there is no need for implantation if the last big tooth is extracted, and it is enough to pay attention to the care after the operation. 2. Need for treatment: If the last big tooth is the second molar, which is an important chewing tooth, it needs to be implanted, or take other ways to install the denture, in order to restore the normal chewing function. After the extraction of the last big tooth, according to the specific which tooth to decide whether the need for implantation or treatment, it is recommended to go to the regular hospital examination and treatment.