Table 6.

Methods for detecting pulp stones/pulp calcifications in some surveys.

Investigator	Methodology	Race	Sample	Age of subjects (years)	Prevalence (%)
Sayegh et al.(1968)	Histology	—	591 teeth	8–63	8-90% of teeth
Ary et al.(1993)	Microradiography and light microscopy	—	42 teeth	5–13	95%
Ranjitkar et al.(2002)	Bitewings	Australian	3296 teeth	17–35	46% of people, 10.1% of teeth
Colak (2012)	Bitewings	Turkish	2391 teeth	15–65	63.6% of people, 27.8% of teeth
Kannan et al.(2015)	Periapical film	Malaysians	1779 teeth	10–70	44.9% of people, 15.7% of teeth
Hillmann & Geurtsen (1997)	Histology	—	332 teeth	10–72	11–30 years:14.9% of teeth 31–51 years: 44.4% of teeth 52–72 years: 65.1% of teeth
Rodrigues et al.(2014)	CBCT	Brazilian	181 patients	10–76	55% of people (31–40 years: 89.7%)
da Silva et al.(2016)	CBCT	Brazilian	2833 teeth	19–75	31.9% of people, 9.5% of teeth
Hsieh et al.(2017)	CBCT	Taiwanese	2554 teeth	13–86	83.3% of people, 31.3% of teeth