马炜 田文
Ulna impaction syndrome ( UIS ) is a degenerative process caused by excessive stress bearing across the ulnar aspect of the wrist, with a series of pathological and clinical changes. Recent studies demonstrate that the biomechanical changes caused by ulnar variance play a crucial role in the process. Currently, the diagnosis of UIS is made by clinical manifestations, physical examinations and imaging examinations, such as the X-ray, Computed Tomography ( CT ), Magnetic Resonance Imaging ( MRI ) and so on. Besides, some special examinations are recommended if necessary, including arthrography, ultrasound and arthroscopy. Depending on the special conditions of patients, either conservative treatment or surgery is effective. The traditional procedures include ulnar shortening osteotomy and Wafer procedure. With the advancement of modern technologies and instruments, some new procedures are created based on them, which lead to the improvement of surgical results.
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