Radiological Changes of Bone and Joint in the Upper Extremities of Chain-saw Workers

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Changes of the elbow and the wrist joint were studied by analysing the indirect roentgenograms of 100 fellers using chain saws. The incidence of changes was significantly higher (p<0.01) in the wrist joint (16.3%) than in the elbow (10.9%). The occurrence rate of changes in the elbow was not correlated with the period of chain-saw-use, but rather with age of the individual, while, in the wrist joint no correlation with the both.The following changes were seen with comparatively high frequency: In the elbow, osteophyte formation (25.0%), spur formation at the olecranon (21.0%) and bone atrophy (13.5%). In the wrist joint, displacement of radial and ulnar articular surfaces (46.0%), bone atrophy with bone cysts (11.5%) and osteophyte formation (9.0%).The right elbow showed significantly higher incidence of subchondral sclerosis and bone cysts (p<0.05), and joint space narrowing and joint mice (p<0.01) than the left side. As to the wrist joint, no predominant difference of the changes between left and right was found.
西日本整形・災害外科学会の論文