TABLE 1. Description of age cohorts from Inglis 1A and Inglis 1C. Cohorts are separated qualitatively. Height is the height of the enamel from the linea sinuosa to the metaconid; the average is given, with the range following parenthetically. Abbreviations: N, number of specimens; BRA, buccal reentrant angle; LRA, lingual reentrant angle; acd, anteroconid complex; met, metaconid.

		Inglis 1A				Inglis 1C
	Cohort	Qualitative description	N	Height		N	Height
	I	Completely unworn	0	-		1	1.29
	II	Barely any wear visible; juvenile wear pattern	4	1.10 (1.08-1.14)		2	1.09 (1.08-1.09)
	III	Mature wear pattern, except on acd; m2-3 BRA2 pits not yet at occlusal surface	15	0.97 (0.79-1.01)		5	0.98 (0.94-1.00)
	IV	Mature wear pattern; m2-3 BRA2 pits at occlusal surface	10	0.95 (0.80-0.98)		21	0.84 (0.79-0.91)
	V	Constricted opening of LRA1 and LRA3; acd-met dentine tract expanded	5	0.77 (0.65-0.90)		7	0.70 (0.63-0.74)
	VI	LRA1 and LRA3 completely eroded away	0	-		3	0.56 (0.54-0.58)