If you decided to bridge the gap in your teeth by installing a dental implant, it will take rather long. The waiting period is necessary for the implant to root down in your jaw (it’s called osseointegration) and become a durable carrier for your crown. Installing an implant will take several steps:

•     Examination. The dentist must make sure that the implants are installable. There may be factors that make it impossible; for example, if your bone where you want an implant is too thin. There are operations like hard tissue reconstruction that form a dense background; the dental implants cost will grow, but sometimes it’s the only way.
•     Virtual operation. Using 3D models of your jaws and actual teeth (and other implants, if any), the dentist will emulate the actual installation. All you have to do for that is undergo 3D scanning of your jaws.
•     Preparations. The spot should be clean; if there are any broken teeth or tooth root remains, they should be removed. The soft tissue needs to be reflected for the dentist to access the bone of the jaw. Then a hole is drilled, and the implant is installed.
•     Loading the crown. It was considered earlier that osseointegration (bone growing to the surface of the implant) might take from three to six months. Now it’s no more a dogma, but certain specifics may require you to wait for some time before loading. 

Integration failures still happen. If you want to have dental implant dentures, it’s no problem if one of the implants fails to integrate.