A Sex Discriminant Function Analysis by the Dental Measurements of Koreans / 체질인류학회지

When the bones of a human being are excavated, the teeth in particular can be a great help in distinguishing the sex of the person because they remain unchanged in terms of physical and chemical characteristics. We measured mesiodistal diameters of the crown of teeth and faciolingual diameters of the crown of teeth of 215 adult dental casts (male 109; female 106) and teeth of the 166 cadavers (male 127; female 39). Among these samples, we made use of only measurement values with statistical significance to obtain discriminant functions by discriminant analysis and to verify this study. Fifty one discriminant functions are obtained through several combinations of independent variables so that they can be applied to the bones of human being found in archaeological excavations. Among them, only 34 functions have the statistical significance, showing the correct classification from 64.5 to 89.8%. The other 17 functions are excluded from the discriminant analysis on the basis of Box's M value and Wilks' Lambda value. Among these 34 functions, only 8 functions with high classification accuracy are tested. They show the correct classification from 62.8 to 84.6%. The highest classification accuracy can be achieved when all of the lower teeth (I1 to PM2) are used. The functions from the canine tooth of the lower jaw have high potential usefulness because they can be applied to a variety of materials.

Group Analysis Using the Metric Measurements of Korean skulls / 체질인류학회지

The metric parameters including Martin's (#41, 43, 44, 45, 46, 51, 52, 53) and non -Martin's parameters (nasion - occipital length, glabella -occipital length, nasion -inion length, glabella -lambda length, basion -nasion length, biauricular breadth, biasterion breadth, porion -bregma height, porion -vertex height, frontal arc, frontal chord, parietal arc, parietal chord, occipital arc, occipital chord, mastoid height, mastoid width, basion -prosthion length, internal palate length, internal palate breadth, external palate length, external palate breadth) were measured on 61 Korean skulls (M47, F14) with cephalometry (GPM Co., Swiss) and calipers (GPM Co., Swiss, Mitutoyo Co, Japan). Using the metric data of 35 parameteres, the statistic procedure (descriptive statistics, t -test, paired t -test, discrimination process, group analysis) was performed. Among those parameters, 28 parameters have the statistic significance in group analysis. The 2 clustering was most appropriate.

Sex Discrimination with the Metric Measurements of the Korean dried Pelvic Bones by Discriminant Function Analysis / 체질인류학회지

Pelvic bone is the representative bone which has the quite different features discriminating the sex. And these features are well described in almost all gross anatomy textbooks. The parameters which are used to sex determination are relating to the those of obstetrics. To suggest the most significant parameters for sex discrimination with the bones, we have selected the frequently mentioned 21 metric fields of non-pathologic Korean pelvic bones, which sexes were already confirmed (M: 40, F : 19). Measuring theses metric measurements, the statistic procedure (descriptive statistics and discriminant analysis) were performed (SASPC version 6.11). The parameters showing more than 80% of discriminating probability are the acetabular length (Martin No. 22) and the pubic angle(Martin No. 16). The parameters showing more than 75% of discriminating probability are the transverse diameters of pelvic outlet (Martin No. 27), the breadth of greater sciatic notch, the ischiatic length (Martin No. 15a), the pelvic breadth (Martin No. 2), the obturator foramen long length (Martin No. 20), the obturator foramen short length (Martin No. 20) and the pelvic height (Martin No. 1).