Table 3.

Number and percentage of Isthmi and apical deltas

Reference	Number of teeth	Transverse anastomosis (%)	Apical deltas (%)
Vertucci[3]	100	30.8	15.1
Caliskan et al.[13]	100	20	26
Kartal et al.[11]	300	37	15
Sert and Bayirili[7]	200	20.5	26.5
Weng et al.[10]	100	65	43.8
Present study (2010)	200	19	14