If you are missing a tooth or molar, an implant can be a good solution to replace the missing tooth or molar. Implants are a type of titanium artificial roots that are placed in the jaw like a screw to replace an absent tooth root. A crown, bridge or overdenture can be placed on an implant. The placement of the implant is a minor surgical procedure with local anesthesia. Once the implants have been placed, it takes an average of two months before a definitive crown or bridge can be placed on them. This is the period in which the implants have to grow firmly into the bone.