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In the intact wrist, three dimensional motions of the carpal bones has been reported as a screw displacement axis representation of the motion as the angular motion of the bones or as translations between the bones, however the latter has frequently been quantified as a displacement in the direction of the screw axis. Current research aimed to establish correlation between global wrist laxity and movement of the scaphoid and the lunate in various places during radio ulnar deviation of the wrist. Material and methods: The proposed study was a prospective study conducted in the Department of Orthopedics, RMCH, Bareilly, UP, comprising 100 healthy volunteers with equal sex ration who never had any symptoms pertaining to their wrist joint. An informed written consent was obtained. Standard posterolateral and true lateral radiograph of wrist were made to exclude any radiological abnormality. PA and lateral radiograph were obtained in full radial and ulnar deviation. A custom-made positioning device was used to ensure proper placement of the hand and wrist during the examination. Results: We observed that the age varied from 21 years to 40 years. Radial deviation varied from 10 to 25 degree with mean of 18.06 degree. Ulnar deviation varied from 25 to 60 degree with mean of 36.51 degree. Laxity score varied from 31 to 100 with mean of 64.20. Conclusion: Within the limitations of the present study, it can be concluded that the ulnar deviation of the wrist is seen to cause radial translation ad dorsal rotation of the proximal carpal row. Similarly, the radial deviation was seen to cause ulnar translation and volar rotation of the proximal carpal row.

Correlation between Global Wrist Laxity and Movement of the Scaphoid and the Lunate in Various Places During Radio Ulnar Deviation of the Wrist