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Barón Zárate-Kalfópulos, Samuel Romero-Vargas, Eduardo Otero-Cámara, Victor Correa Correa and Alejandro Reyes-Sánchez

Object

The aim of this study was to describe the pelvic parameters in a sample of healthy Mexican volunteers and to compare them with previously reported data for Caucasian and Asian populations.

Methods

This was a transversal study that included a sample population of healthy Mexican volunteers. Age, sex, and lateral radiographs of the lumbosacral region with the individual standing to obtain the pelvic parameters of pelvic tilt (PT), sacral slope (SS), pelvic incidence (PI), and lumbar lordosis (LL) were recorded in each volunteer. The data were compared with those previously published for Caucasian and Asian individuals.

Results

In total, 202 Mexican individuals (81 men and 121 women; mean age 46.5 years, range 18–85 years) were included. There were statistically significant differences between the Mexican and Caucasian control group with respect to PT (11.9° vs 15.78°, respectively) and PI (51.91° vs 56.68°, respectively). Comparison with the Asian population showed statistically significant differences in relation to the Mexican group in terms of the PT (11.5° vs 15.78°), PI (47.8° vs 56.68°), and SS (36.3° vs 40.89°). The mean LL was 60.17° for the Mexican group, 52.3° for the Asian group, and 61.3° for the Caucasian group. A significant difference in LL was found between the Mexican and Asian populations (p < 0.0001).

Conclusions

A comparison of the values for pelvic parameters and lumbar lordosis across the different population samples revealed statistically significant differences, which can be attributed to the ethnic origin of the individuals.

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Samuel Romero-Vargas, José Luis Ruiz-Sandoval, Arturo Sotomayor-González, Rogelio Revuelta-Gutiérrez, Miguel Angel Celis-López, Juan Luis Gómez-Amador, Ulises García-González, Raul López-Serna, Victor García-Navarro, Diego Mendez-Rosito, Victor Correa-Correa and Sergio Gómez-Llata

Induced deformation of the cranial vault is one form of permanent alteration of the body that has been performed by human beings from the beginning of history as a way of differentiating from others. These procedures have been observed in different cultures, but were particularly widespread in Mesoamerica. The authors examined and reviewed the historical and anthropological literature of intentional deformation practices in Mayan culture. The Mayans performed different types of cranial deformations and used different techniques and instruments to deform children's heads. The most remarkable morphological alteration is seen in the flattening of the frontal bone. Some archeological investigations link deformation types with specific periods. This article provides a glance at the cultural environment of the Mayans and demonstrates the heterogeneity of this interesting cultural phenomenon, which has changed over time.