Investigation of three-rooted deciduous mandibular second molars in a Chinese population using cone-beam computed tomography

Table 3 Concurrence of the three-rooted DMSMs and PMFMs (n)

	Right			Left
	DMSM^P	DMSM ^A	Total	DMSM ^P	DMSM^A	Total
PMFM^P	24	33	57	14	32	46
PMFM^A	19	132	151	15	156	171
Total	43	165	208	29	188	217
Spearman’s rank correlation test
	rho = 0.325, p = .000			rho = 0.260, p = .000

DMSM: deciduous mandibular second molar; PMFM: permanent mandibular first molar; ^P: presence of the DL root; ^A: absence of the DL root

ISSN: 1472-6831