Table 3.

Greatest maximum and smallest minimum principal stresses (MPa) on the surface of the modeled cortical bone when the miniscrew was placed vertically or obliquely in each cortical bone thickness.

Cortical bone thickness (mm)	Insertion direction		Loading direction
			Upward	Downward	Left-side	Right-side
Type A miniscrew
1.5	Vertical	Maximum	6.1	5.0	5.2	7.8
		Minimum	− 11.8	− 24.8	− 21.9	− 13.0
	Oblique	Maximum	5.2	14.6	8.6	7.2
		Minimum	− 20.5	− 14.5	− 24.1	− 19.6
2.0	Vertical	Maximum	7.6	5.7	4.9	6.4
		Minimum	− 12.1	− 21.8	− 19.6	− 13.1
	Oblique	Maximum	4.7	12.5	8.6	6.8
		Minimum	− 18.5	− 14.5	− 24.4	− 19.1
3.0	Vertical	Maximum	5.6	5.9	4.3	7.0
		Minimum	− 12.8	− 24.0	− 20.5	− 12.3
	Oblique	Maximum	4.3	12.1	8.2	6.4
		Minimum	− 19.9	− 13.7	− 25.2	− 19.2
Type B miniscrew
1.5	Vertical	Maximum	8.2	9.2	7.4	5.1
		Minimum	− 24.5	− 25.8	− 22.4	− 17.0
	Oblique	Maximum	7.8	8.2	7.0	6.5
		Minimum	− 14.0	− 15.2	− 22.1	− 24.9
2.0	Vertical	Maximum	5.2	8.2	5.6	5.0
		Minimum	− 14.4	− 25.2	− 24.6	− 18.5
	Oblique	Maximum	4.2	7.7	6.9	6.1
		Minimum	− 10.5	− 12.4	− 17.1	− 23.8
3.0	Vertical	Maximum	8.4	9.4	7.1	7.0
		Minimum	− 14.6	− 24.9	− 31.1	− 17.5
	Oblique	Maximum	5.7	7.4	6.4	6.2
		Minimum	− 12.2	− 12.8	− 20.0	− 20.3