5.1. Materials 

This CD-ROM includes the histomorphometric data and images of a total of 228 deciduous tooth crowns from 122 infant-juvenile individuals from the Isola Sacra graveyard (SCR). The age-at-death distribution of the individuals is as follows:

 

Age class (in years)	N individuals	% individuals
0-0.5	3	2.46
0.5-1	13	10.66
0-1	16	13.11
1-2	32	26.23
2-3	11	9.02
3-4	10	8.20
4-5	10	8.20
1-5	63	51.64
5-6	7	5.74
6-7	7	5.74
7-8	5	4.10
8-9	11	9.02
9-10	3	2.46
5-10	33	27.05
10-11	4	3.28
11-12	4	3.28
12-13	2	1.64
>10	10	8.20
0-13	122

 

The 228 teeth are from both dental arches (upper = 37.7%; lower = 62.3%) and represent all three morphological classes (deciduous incisors, canine, molars), in to the following proportions:

 

Upper Arch		N	%
central incisor	ui1	10	4.39
lateral incisor	ui2	6	2.63
canine	uc	40	17.54
first molar	um1	19	8.33
second molar	um2	11	4.82
		86	37.72
Lower Arch
central incisor	li1	5	2.19
lateral incisor	li2	16	7.02
canine	lc	64	28.07
first molar	lm1	36	15.79
second molar	lm2	21	9.21
		142	62.28
Both Arches		228

 

Whenever possible, canine teeth were selectively sampled because of their higher susceptibility to stress (Goodman and Armelagos, 1985; Goodman and Rose, 1990).

The distribution of the teeth with respect to the age-at-death structure of the sample is as follows:

 

Age class (in years)	N teeth	% teeth
0-0.5	5	2.19
0.5-1	25	10.96
0-1	30	13.16
1-2	54	23.68
2-3	25	10.96
3-4	17	7.46
4-5	21	9.21
1-5	117	51.32
5-6	10	4.39
6-7	13	5.70
7-8	10	4.39
8-9	23	10.09
9-10	6	2.63
5-10	62	27.19
10-11	8	3.51
11-12	9	3.95
12-13	2	0.88
>10	19	8.33
0-13	228

 

Before sectioning for histomorphometric analysis, each crown was preliminarily investigated for the occurrence of enamel macrodefects (hypoplasias) on the buccal (labial) surface. The total crown height and the perpendicular distance between the cemento-enamel junction and the mid-point of the enamel defect (Goodman et al., 1984; Corruccini et al., 1985; Goodman and Armelagos, 1985) were measured with a Mitutoyo Digimatic caliper. Mesiodistal (M-D) and buccolingual (B-L) diameters were also systematically measured.

All the 228 crowns included in the sample were free from caries.

Cited References

Corruccini R.S., Handler J.S., Jacobi K.P. (1985) Chronological distribution of enamel hypoplasias and weaning in a Caribbean slave population. Human Biology, 57: 699-711.

Goodman A.H., Armelagos G.J. (1985) Factors affecting the distribution of enamel hypoplasias within the human permanent dentition. American Journal of Physical Anthropology, 68: 479-493.

Goodman A.H., Rose J.C. (1990) Assessment of systemic physiological perturbations from dental enamel hypoplasias and associated histological structures. Yearbook of Physical Anthropology, 33: 59-110.

Goodman A.H., Armelagos G.J., Rose J.C. (1984) The chronological distribution of enamel hypoplasias from prehistoric Dickson Mounds populations. American Journal of Physical Anthropology, 65: 259-266.

 

Enamel Microstructure and Developmental Defect of the Primary Dentition