Implants are narrow pins made of bone-compatible pure titanium and are inserted into the jawbone. The moving teeth can be attached to these implants. It requires about 3 to 6 months for the bone to grow and be repaired around the implant. When choosing an implant, available bone amount, bone strength rate and implant insertion time are considered. If sufficient amount of bone is not available for implant insertion, in certain circumstances, bone may be grafted from elsewhere. Moreover, various methods of applying implants including screw-based and screw-free (glue-based) methods may be selected according to bone hardness. The implant can be replaced immediately after losing or pulling (or extracting) a tooth or after a long recovery. The shape of the implant is similar to a natural tooth root. After tooth loss, in case of not quickly replacing it with the implant, it is possible to have weakened bone and reduced ability to chew and adjacent crooked teeth. If delayed implant insertion is recommended, smaller and cylindrical implants are used since less amount of bone is available. The place for implant insertion and correct implant type are suggested after examination by the dentist, taking into account other conditions. The volume and density of the jawbone; number, position and strength of one’s natural teeth; gum conditions; and condition and number of opposite jaw teeth are among the important factors during the examination.