Dental implants provide a foundation for the restorative dentist to replace missing teeth to form and function. Facial contours and tooth space is also maintained by replacing missing teeth. Implants are built on titanium posts, which are inserted into the jawbone where the teeth are missing. There are many different types of implants and the choice is made upon examination, the degree of space, and the amount of remaining bone. Once the implant is placed, healing may take six months, after which, it acts as if it were a tooth root substitute.