Correlation between the acetabular diameter and thickness in Thais.

We conducted a study on dried cadaveric pelvic bones to determine the relation between acetabular diameter and thickness of the acetabular wall. The acetabulum was divided into four quadrants: antero-superior, postero-superior, postero-inferior, and antero-inferior. The diameters of the acetabulum were measured for 152 pelvic bones. The thickness of the center of the acetabulum was measured with the use of a caliper at four quadrants of the acetabulum. The average acetabular diameter was found to be 51.8224 mm for all the acetabuli. The average thickness in the posterior quadrant has been calculated to be about 50% of the acetabular diameter, which is about 26 mm. The acetabular diameter and the thickness of the acetabulum correlated very well though there was very little significance statistically (0.099) due to the lack of full data for all the individual bones. Linear correlation between the thickness and the diameter is definitely collinear but the correlation is not statistically significant. Some additional factors such as bone density, body mass, etc, are required to correlate the thickness and the diameter. Further study is required in this field.