The seventh tooth, the second molar, is the best option for implant restoration after extraction, but not all oral conditions are amenable to implant restoration. Under normal circumstances, there are only 28 teeth in an adult’s mouth excluding wisdom teeth, and they are arranged symmetrically up and down, left and right in the mouth. The seventh tooth, also known as the second molar, is a molar located at the very back of the mouth (wisdom teeth are excluded). After the second molar is extracted, it is end missing and is not suitable for traditional crown and bridge restoration. The best solution is to use a stand-alone implant restoration, where a pure titanium nail is implanted in place of the missing root, and then an abutment and restoration are attached above it. However, implant restoration requires high requirements for the missing tooth gap, adequate bone width, bone thickness and bone with sufficient height, in addition, there are certain requirements for the health status of the organism. Otherwise, only movable denture restoration treatment. It is recommended to go to the regular dentistry consultation, choose the appropriate treatment plan.