Oblique Ulnar Styloid Osteotomy-A Treatment for Ulnar Styloid Impaction Syndrome

Oxford University Hospitals NHS Trust, Oxford, England, United Kingdom
The Journal of hand surgery (Impact Factor: 1.67). 11/2011; 36(11):1785-9. DOI: 10.1016/j.jhsa.2011.07.023
Source: PubMed


We report a series of 5 patients (mean age, 41 y) presenting with ulnar styloid impingement syndrome (USIS) and treated by an oblique ulnar styloid osteotomy. The purpose of the study was to determine whether the osteotomy is an effective method for treating USIS.
The diagnosis of USIS was made based on a history of ulnar-sided wrist pain supported by clinical and radiological findings. Clinical assessment included provocative tests to differentiate USIS from pain associated with ulnocarpal impaction syndrome. The ulnar styloid length was assessed with a posteroanterior X-ray using the methods of Garcia-Elias and Biyani. The ulnar styloid was deemed excessively long if the ulnar styloid process index was greater than 0.21 or if the overall styloid length was greater than 6 mm. Ulnar variance was recorded. All wrists were assessed by computed tomography arthrography and magnetic resonance imaging studies to rule out any associated soft tissue abnormalities, including ligamentous injuries. Preoperative and postoperative pain levels were recorded using a pain scoring system.
Patients were followed up for a mean of 46 months. Before surgery, the mean styloid length was 10 mm, and the ulnar styloid process index was 0.32. The reported pain score was significantly reduced following surgery and all patients, except one, returned to premorbid levels of activity.
Oblique ulnar styloid osteotomy is an effective means of relieving impaction of the ulnar styloid while preserving the integrity of the intrinsic ulnar styloid ligaments.
Therapeutic IV.

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