Comparison of lag screws and double Y-shaped miniplates in the fixation of anterior mandibular fractures

Table 1 Mean operating time

	Group	n	mean ± SD	t	Significance (2-tailed)
Operating time	1	8	14.3750 ± 1.92261 min		0.172
Operating time	2	8	15.6250 ± 1.52947 min	-1.439

Table 2 Mean bone density in the 2 groups at 3 and 6 mo postoperatively

	Group	n	mean ± SD	t	Significance (2-tailed)
Bone density 3 mo post-operation	1	8	946.3825 ± 66.29304	2.822	0.015a
	2	8	830.3625 ± 95.52573
Bone density 6 mo post-operation	1	8	1062.6575 ± 63.88916	-0.573	0.576
	2	8	1083.8550 ± 82.82562

^aP < 0.05.