Table 1: Numbers and percentages of patients with mandibular first molars having an extra distolingual root by gender, unilateral and bilateral status, and total occurrence.

UnilateralBilateralTotal
Number of patientsRightLeft
No.%No.%No.%No.%

Female (130)32.3110.7753.8596.92
Male (120)32.5000.0043.3375.83
Total patients (250)62.4010.4093.60166.40
No. of total teeth examined (500)61.2010.20183.60255.00