Table 2.

Validation of FE model.

	FEA strains from model with postorbital septum		Strains recorded from in vivo chewing experiments
Region	Maximum shear strain	Principal strain ratio (Max/Min)	Mean maximum shear strain ± 2 standard deviations	Mean principal strain ratio ± 2 standard deviations*	Experiment	Reference
Dorsal interorbital	72	3.0	169 ± 94	2.1 ± 0.4	5 A (W)	Hylander et al. (1991)
			266 ± 82	2.3 ± 0.2	5 A (B)
			185 ± 78	4.0 ± 0.4	6 (W)
			182 ± 68	4.0 ± 0.6	6 (B)
			139 ± 110	1.8 ± 0.2	2 A (W)
			129 ± 42	1.7 ± 0.2	2 A (B)
			86 ± 38	2.4 ± 0.6	2 B (W)
			117 ± 56	3.1 ± 0.6	5 B (W)
			240 ± 116	2.6 ± 0.4	5 C (W)
			200 ± 84	2.1 ± 1.0	5 C (B)
Working-side dorsal orbital	42	0.4	100 ± 62	0.5 ± 0.2	5 A	Hylander et al. (1991)
			85 ± 44	0.7 ± 0.2	6
Balancing-side dorsal orbital	28	1.0	147 ± 60	1.4 ± 0.2	5 A	Hylander et al. (1991)
			105 ± 29	1.4 ± 0.2	6
Working-side infraorbital	329	1.7	325 ± 174	1.4	2 C	Hylander et al. (1991)
			613 ± 256	1.1	5 C
			180 ± 128	0.1 ± 0.5**	7	Ross et al. (2002)
Balancing-side infraorbital	134	1.4	199 ± 144	2.2	2 C	Hylander et al. (1991)
			295 ± 234	2.4	5 C
			192 ± 160		7	Ross et al. (2002)
Working-side mid-zygomatic	424	1.0	661 ± 414	1.0	2 A	Hylander et al. (1991)
			569 ± 244	0.9	2 B
			250 ± 104	0.7	5 B
			857 ± 360	0.6	2	Hylander & Johnson (1997)
			614 ± 274	0.7	5
			398 ± 204	0.7	7
			391 ± 72	0.7	9
Balancing-side mid-zygomatic	314	0.9	352 ± 238	0.9	2 A	Hylander et al. (1991)
			578 ± 212	0.5	2	Hylander & Johnson (1997)
			440 ± 254	0.6	5
			349 ± 262	0.6	7
			202 ± 168	0.6	9
Working-side postorbital bar	93	1.0	135 ± 113	1.0 ± 0.5	46	Ross CF (unpublished data)
			194 ± 197	47
			142 ± 129	48

^*Standard deviations and, in some cases, means were not reported for all experiments.

^**Data from this experiment were highly skewed, with most chews exhibiting high compression and low tension. However, the highest value observed in this experiment was 1.8.