428 Ulna Shortening Osteotomy Using a Dorsal DCP Plate Versus Volar Low-Profile Plate: Which Is Superior?

Abstract Aim There is limited literature comparing differing techniques and equipment used in ulna shortening osteotomy. This study reviewed operative outcomes of osteotomies across one NHS Trust. Our aims were to compare two different techniques: dorsal-approach DCP plates versus volar-approach low profile evaluate the impact plate size on union rates. Method We performed a retrospective review all patients undergoing an osteotomy between 2016–2021 at North West Anglia Foundation patient demographics, surgical technique, size, complications, rates need for reoperation. Outcomes compared using Fisher's exact test. Results 32 identified. 21 had dorsally placed Stanley jig, 11 volar low-profile alternative systems. The majority 6 or 7 holes. One 5-hole was used, resulting only case non-union. Overall complication rate 41%. 38% with dorsal symptoms irritation post-operatively. 5 needed removals, which significantly greater than group (rate 0%, p = 0.03). no cases nerve damage CRPS group. Conclusions found that should be avoided led more requiring removal. Overall, improvements function pain scores acceptable comparable regardless technique used.