No, it’s not necessary to have an implant for every single tooth that needs to be replaced. The number of implants necessary to provide support depends on the type of implants used and the type of restoration that will be attached to the implants.
A thorough oral exam and panoramic x-ray are necessary to determine which implant solution can be used and how many must be used. Sometimes additional x-rays or CT scans are used in more complicated cases, but Dr. Rogler will be able to better understand your situation at your consultation.