there are many techniqual terms related to dentistry such as tooth extraction, implant, fixed or removable prosthesis, endodontics, periodontics, restoratives.
for conversation, It depends on what your dentist sees what should be done.and what you need.
fot example: your dentist may say that you have small caries in one of your teeth, in this case they will advice you to make a restorative filling for your tooth.
if there is severe pain, they will advice you for endodontic treatment ( trating of pulp ).
many missing teeth, removable appliance ( prosthesis).
small number of missing teeth, fixed prosthesis.