الفهرس 
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Abstract
Ulnar impaction syndrome is defined as an abutment of the ulna on the lunate and sometimes the triquetrum as a result of cumulative load increase across the wrist joint. It is also called ulnocarpal abutment syndrome which is a common cause of ulnar-sided wrist pain. The syndrome is a degenerative condition consisting of the triad of a triangular fibrocartilage complex (TFCC) tear, a lunotriquetral ligament tear, and an ulnar positive variance. There is often chondromalacia of the ulnar head and proximal ulnar aspect of the lunate.
The aim of the clinical trial was to prospectively compare the functional outcomes of combined arthroscopic wafer resection and TFCC debridement with the ulnar shortening diaphyseal osteotomy in the treatment of ulnar impaction syndrome.
Twenty-three patients were enrolled and divided randomly into two groups:
• Arthroscopic wafer resection with TFCC debridement (AWP group): eleven patients.
• Ulnar diaphyseal shortening osteotomy (USO group): twelve patients.
These patients were followed up for a minimum of 12 months. Patients were 10 men and 13 women with an average age of 37 years, average variance of 3 mm. All patients were evaluated for clinical outcomes by MMWS and DASH score and radiographic features preoperative by MRI and X ray and finally by X ray to assess variance correction.
Our results reported that the operative time was significantly shorter in the AWP group. Clinical outcomes assessed by DASH and MMW scores showed significant improvement in both groups postoperatively. Comparing the results of