Table 3.

Overview of case studies on C-shaped roots and root canals

Tooth	Ethnic group	Age	Sex	Reference
Max. lateral incisor	n/a	11	F	Boveda et al. (1999)
	n/a	12	F	Steffen & Splieth (2005)
Max. first molar	Caucasian	11	F	Dankner et al. (1990)
	Caucasian	17	F	Moor (2002)
	Caucasian	28	F	Yilmaz et al. (2006)
	Caucasian	44	F	Moor (2002)
	n/a	67	F	Martins et al. (2013)
	Caucasian	21	M	Moor (2002)
	Caucasian	26	M	Moor (2002)
	Caucasian	37	M	Newton & McDonald (1984)
	n/a	39	M	Martins et al. (2013)
	n/a	42	M	Kottoor et al. (2011)
Max. primary second molar	n/a	40	F	Ballal et al. (2006)
Max. second molar	Caucasian	32	F	Fava et al. (2000)
	n/a	36	F	Singla et al. (2010)
Max. third molar	Caucasian	35	M	Keinan et al. (2009)
Mand. first incisor	n/a	13	F	Hintze (2006)
Mand. lateral incisor	n/a	30	M	Chaniotis et al. (2008)
Mand. second premolar	East Indian	15	M	Cleghorn et al. (2006)
Mand. first molar	Caucasian	25	M	Rice & Gilbert (1987)
	Caucasian	32	M	Barnett (1986)
	Caucasian	50	M	Bolger & Schindler (1988)
Mand. second molar	n/a	19	F	Ravichandra & Harikumar (2010)
	n/a	19	F	Ravichandra & Harikumar (2010)
	n/a	23	F	Ravichandra & Harikumar (2010)
	n/a	23	F	Ravichandra & Harikumar (2010)
	n/a	25	F	Ricucci et al. (1996)
	n/a	26	F	Lynn (2006)
	n/a	27	F	Krishan & Aggarwal (2011)
	Caucasian	32	F	Fava et al. (2000)
	n/a	32	F	Benenati (2004)
	n/a	33	F	Kadam & Ataide (2013)
	n/a	36	F	Grocholewicz et al. (2009)
	n/a	38	F	Bogaerts (1997)
	n/a	23	M	Ricucci et al. (1996)
	n/a	26	M	Kadam & Ataide (2013)
	n/a	41	M	Ricucci et al. (1996)
	n/a	52	M	Walid (2000)
	n/a	59	M	Grocholewicz et al. (2009)

F, female; M, male; mand., mandibular; max., maxillary; n/a, not available.