Abstract: Objective To construct digitized three-dimensional models of the sacrum of women of Uygur and Han nationalities
in Xinjiang and assess their value in anatomical studies. Methods Ninety Uygur women and 90 Han women of child-bearing
age in Xinjiang were recruited. Digitized three-dimensional reconstruction was used to construct the sacrum models for
morphological study and measurement of the physiological indices. Results The sacral forms of Han women were consistent
with the standard anatomical descriptions. Of the Uygur women, 57 (63.3%) showed a standard type of the sacrum, 6 (6.7%)
had 4 pairs of sacral foramens, 9 (10%) had 5 pairs of sacral foramens, and 18 (20%) had sacrococcygeal joint abnormalities.
There were significant differences in sacral morphologies between the two nationalities (P<0.05). The depths of the sacrum
foramen and sacral hiatus were significantly greater in Uyghur women than in Han women (P<0.05). Only a minor proportion
of the cases had nonstandard sacral types, found only in Uygur women. Conclusion Uygur and Han women of child-bearing
age in Xinjiang have morphological and anatomical differences of the sacrum, which should be considered in clinical practice.