There are two types of the pulp chamber: cynodontic, which is the most frequent in a modern human, and taurodontic, which is much rarer. We have analyzed 360 orthopantomograms of orthodontic patients from Niš, 12-21 years of age, with the aim of determining the frequency of specific pulp chamber forms and assessing its size in the vertical direction in M1 and M2. The measurement was conducted by calipers in the midpoint of the pulp chamber and the dental tissue above it. The form is cynodontic if the pulp size is smaller than 1/2 of the dental tissue, while if the size is bigger, it is the taurodontic form. In both molars, the cynodontic form was found in the greatest percentage (70.49%), the hypo-taurodontic form made a significantly lower percentage (26.87%), and the taurodontic form was found in only 2.64% of the patients. Individually observed, the cynodontic form appears most frequently in the mandibular M1 (81.13%) and most rarely in the maxillary M2 (61.88%), so it is characteristic mostly for mandibular molars. The taurodontic form is more often registered in M2, mainly in the mandibular one (3.75%). The hypo-taurodontic form is more represented in maxillary molars (35%), whereas its presence is the rarest in the mandibular M1 (15%). The pulp size ranged 2-3 mm in a high percentage (70-80%) in the cynodontic form, while in the hypo-taurodontic form it was 4-5 mm in 80-91% of the examined teeth. The examinees in our sample are predominantly characterized by the cynodontic form of the pulp, the height of which is 2-3 mm.
