Four-Rooted Maxillary First Molars: A Systematic Review and Meta-Analysis

Table 3

Evaluation of different anatomical characteristics, classification, and gender.

Christie’s Radicular Type (n = 46) [12, 13]	Type I	52.83%
	Type II	18.87%
	Type III	18.87%
	Type IV	1.88%
	n.d.	7.54%
Pulpal floor type (n = 33) [14]	Type A	45.45%
	Type B	51.52%
	Type C	0.00%
	Type D	3.03%
Amount of root canals (n = 77)	4 RCs	62.34%
	5 RCs	27.27%
	6 RCs	9.09%
	7 RCs	1.30%
Tooth number (n = 54)	Left #26	50.0%
	Right #16	50.0%
Sex (n = 68)	Female	39.71%
	Male	60.29%

The information on the investigated case reports and the CBCT studies was combined. , n.d.:not defined, RC:root canal.