Radiologic Analysis in Normal Glenohumeral Joint

Lee, Yong Girl; Chung, Duke Whan; Lee, Chun Woo; Lee, Jae Hoon

Abstract

We measured several relationships of humeral and glenoid articular surfaces with radiologic analysis in the 60 shoulders of normal adults(the 30 males and 30 females) who were without pain and limitation of motion. The average age was 29.1 year-old in the males(from 26 to 39), 27.7 year-old in the females(from 20 to 34). The results of measurement were as follows. The average radius of curvature of humeral head was 28.8±1.9mm in the males, 25.3±2,3mm in the females. The average radius of curvature of glenoid was 34.5±3.5mm in the males, 29.3±2.8mm in the females and there was difference between the radius of curvature of humeral head and glenoid about 4-Smm. Average surface area ratio of humeral head versus glenoid was 1.8±0.2 in male, 2.0±0.2 in female. The average thickness of humeral head from anatomical neck was 23.1±1.5mm in the males, 20.5±2.lmm in the females and there was distance between the radius of curvature of humeral head and the thickness of humeral head about 5 me and it was suggested that humeral head was not hemisphere. The average neck shaft angle of humerus was 51.6±4.8 degree in the males, 52.7±3.8 degree in the females. The average flare index was 3.6±0.6 in the males, 3.9±0.7 in the females, so that metaphysis of female was broader than that of male. The lateral humeral offset was 68.5±3.8mm in the males, 63.6±4.3mm in the females. The average distance from the greater tuberosity of humerus to the lateral acromion process was 20.1±3.9mm in the males, 17.6±5.1mm in the females. The average distance of upper surface from the humeral head to the greater tuberosity of humerus was 6.5±1.4mm in males, 5.9±2.0mm in females. The distance from the humeral head to the undersurface of acromion was 9.5±3.1mm in the males, 7.7±3.5mm in females. Our measurement of normal glenohumeral relationship would be useful in the diagnosis of shoulder disorders and in the design of prosthestic reconstruction in Korean. Further study would be required for the analysis of the three dimensional relationship because of the limitation of our two dimensional analysis.