Predictive value of the deltoid tuberosity index for assessing the risk of screw cut-out

Abstract Background Reconstruction of the proximal humerus with a locking plate is often first surgical approach for fractures. Screw cut-out common complication and relevant in osteoporotic bone older adults. The Deltoid Tuberosity Index (DTI) an indirect measure assessing local quality failure rate before surgery, providing important information planning. This was independent, large-sample retrospective analysis correlation between density, indirectly measured through DTI, screw cut-out. Methods In total, 306 cases fractures treated PHILOS (DePuy Synthes, Oberdorf, Switzerland) were retrospectively analyzed. DTI on anteroposterior x‑rays. primary endpoint defined as intra-articular position at least one associated reduction loss after surgery. Results mean clinical follow-up 935 days. varied from 1.10 to 2.28 (average: 1.45). occurred average 8% positively correlated ≤ 1.44 ( p = 0.003). However, widely according age group: ages 65–80 years, increased 0% 17% 0.02); younger (< 65 years) did not correlate oldest group (> 80 rates high (17–20%) independently DTI. Conclusion We confirm High-risk groups are patients over years or any patient than years. Applying offers planning trauma setting via fast, cheap, easy-to-use tool. Level Evidence: 3, Retrospective Cohort Study.