Experimental diagnosis
PERIODONTAL DISEASES
All groups diagnosed the 2 cases according to the current classification of periodontal diseases considering the main categories of diagnosis, i.e., extent, stage, and grade, solely using the provided materials under supervision of the investigators and were given a processing time of thirty minutes in total. Both control groups A(1) and A(2) diagnosed the cases exclusively with the staging and grading matrices that were published along with the classification [