At that time, the types of implants were divided into leaf-shaped implants, lamellar implants, subperiosteal implants, root-shaped and conical implants, and column-shaped implants, including all kinds of shapes and forms, which are really diverse. However, after the 90’s, there was a gradual return to the concept of implantology, which was summarized by practical experience, and some objective theories emerged, which are recognized worldwide. The implants that are now recognized are called root-shaped conical implants. At present, all the implants available on the market belong to this type of implant, because they are more in line with the biomechanics of the human body, so in terms of classification, the only common implant is the root-shaped conical one.