. 2021 Jul 15;18:22. doi: 10.18502/fid.v18i22.6932

Table 2.

Comparison of changes in the number of pulp stones after two years according to the tooth type

Groups			N	Percentage of frequency change	Mean	P
Orthodontic	First molars	Increase	6	4.05	3.5	0.023
	First molars	None	142	95.94		0.023
	Second molars	Increase	44	7.43	6	0.002
	Second molars	None	137	92.56		0.002
	First premolars	Increase	2	1.35	1.5	0.157
	First premolars	None	146	98.64		0.157
	Second premolars	Increase	3	2.02	2	0.102
	Second premolars	None	145	97.97		0.102
Non-orthodontic	First molars	Increase	2	2.7	1.5	0.157
	First molars	None	72	97.29		0.157
	Second molars	Increase	0	0	0	0.999
	Second molars	None	74	100		0.999
	First premolars	increase	0	0	0	0.999
	First premolars	None	74	100		0.999
	Second premolars	Increase	0	0	0	0.999
	Second premolars	None	74	100		0.999