The field of prosthetics includes all dental procedures that involve the repair or replacement of teeth with prosthetics. This includes things like dental crowns and bridges, dentures, and even dental implants.
A prosthodontist is a dentist who specializes in treating complex dental and facial problems, including restoring and replacing missing or damaged teeth with artificial appliances. They are highly skilled in dental implants, crowns, bridges, dentures, jaw disorders, etc.