[Ulna shortening osteotomy using a new 7 hole gliding plate. Results from 73 cases].

Background: Ulna shortening osteotomy is a common procedure for the surgical treatment of ulna impaction syndrome, but it is still associated with complications such as rotation malalignment, and delayed or non-union due to of incomplete closure of the osteotomy gap.
Methods: We have developed a 7-hole titanium compression plate that provides fixation of the ulna before the osteotomy is carried out. With this plate, which has been in use for 4 years, a shortening of up to 10 mm is possible using two gliding holes, with the compression holes enabling the closure of the osteotomy gap. We report the results of 70 patients undergoing 70 ulna shortening procedures, with a follow-up of between 5 and 18 months. Two patient groups underwent follow-up clinical examination as well as completing the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire for evaluation.
Results and Conclusions: There was no occurrence of delayed or non-union. The DASH score averaged 19 points in the prospective and 23 points in the retrospective group, representing a good functional result with only minor impairment. This study indicates that ulnar shortening using this gliding compression plate and performing an oblique osteotomy is associated with a minimal complication rate and highly satisfactory clinical outcome.