Abstract:Objective To evaluate the clinical experience of ulnar shortening oblique osteotomy for ulnar impaction syndrome.Methods From January 2014 to December 2018,41 patients with ulnar impaction syndrome underwent ulnar shortening osteotomy,including 19 males and 22 females with an average age of (45±14) years(rang 21~74 years).We analyzed the general dates of all patients,evaluated the outcomes of postoperative values of ulnar variance,radiounlar distance,visual analog scale(VAS),and modified Mayo wrist score by comparing with the preoperative ones.Results All patients had primary healing.All cases were followed up for(20±2) months (range 16~24 months).An average preoperative ulnar variance of (3.4±0.8)mm was reduced to (-1.7±1.0)mm postoperatively.6 had dorals ulnar dislocation,an average preoperative radioulnar distance of (7.1±2.5)mm was reduced to (2.8±0.7)mm postoperatively.The VAS score was reduced from preoperative (4.6±1.2) to postoperative (2.1±1.7).The average Mayo wrist score was improved from (60.0±12.9)before surgery to (83.3±15.2)after surgery.Conclusion Ulnar shortening oblique osteotomy can reach satisfactory effects for early ulnar impaction syndrome,and can correct dislocation of distal radiounlnar joint.However,clinical efficacy remains controversial in patients with long course or arthritis.