[Measurement and analysis of glenoid bony anatomy by use of three-dimensional computed tomography]

To investigate and analyze the three-dimensional anatomic structure of glenoid bone in some Chinese people so as to provide the accurate anatomic data to design the new prosthesis of glenoid bone for Chinese people.

A total of 90 volunteers with two healthy shoulders (52 males and 38 females, aging 19-60 years with an average of 39.6 years) were selected. Five parameters were measured by use of three-dimensional computed tomography, volume rendering technique (VRT) and multiplanar reformation (MPR), including the maximum antero-posterior width (MAPW), antero-posterior radius of curvature (APROC), maximum supero-inferior height (MSIH), supero-inferior radius of curvature (SIROC) and version angle (VA) of glenoid. All parameters were measured two times, and the average values were analysed by SPSS13.0. The level of significance was set at P < 0.05.

The average MAPW was (2.51 +/- 0.32) cm, the average APROC was (5.50 +/- 1.21) cm, the average MSIH was (3.45 +/- 0.29) cm, the average SIROC was (3.98 +/- 0.55) cm, and the average VA was (-0.03 +/- 4.66) degrees. There were no significant differences (P > 0.05) in MAPW, APROC, MSIH, SIROC and VA between two sides. There were significant differences (P < 0.05) in MAPW, MSIH, SIROC and VA, and no significant difference (P > 0.05) in APROC between female and male. MAPW was correlated with APROC, MAPW was correlated with MSIH, APROC was correlated with SIROC, and the correlation coefficient was 0.298, 0.495 and 0.262, respectively.

There are no significant differences in MAPW, APROC, MSIH, SIROC and VA of glenoid between two sides. There are sexual significant differences in MAPW, MSIH, SIROC and VA. The data and its statistical results may serve as guidelines for the design of the glenoid component.