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Introduction: Pulp stones are discrete foci of calcification in the pulp, radiographically identified as a radiopaque mass within the pulp chamber or root canal. They may obstruct pulp chambers and root canals during biomechanical preparation of root canal treatment.

Objective: To study the prevalence of pulp stones in canines and posterior teeth of permanent dentition.

Materials and Method: It was an observational, analytical, cross-sectional study using convenient sampling. Digital orthopantomograms (OPG) of 420 calculated samples of age range 15-44 years were collected from two centres of Kathmandu. The selected OPGs were evaluated for the presence of pulp stone under standard screen resolution. The association between the occurrence of pulp stones with gender, age group, and tooth type was evaluated using Chi-square test (P <0.001) and analysed using SPSS software version 20.

Result: Among the total sample, 293 (69.76%) showed the presence of pulp stones on at least one site. The occurrence of pulp stones was more common in females 169 (80.47%) as compared to males 124 (59.04%). It was more prevalent in maxillary left first molar 183 (43.6%), followed by maxillary right first molar 176 (41.9%), and least common in maxillary right and left second premolars.

Conclusion: Pulp stones were more evident in female samples. The prevalence of pulp stones was highest in the age group of 35-44 years. It was significantly higher in molars than in canines and premolars. There was a significant association between the prevalence of pulp stones and gender, age group, and tooth type.

Panoramic; prevalence; pulp stone; root canal treatment.