How well does radiographic middle segment height loss reflect CT-defined cage–endplate penetration after zero-profile ACDF? A paired imaging study Research Article
This study demonstrates that while radiographic middle segment height loss moderately correlates with CT-defined cage–endplate penetration after zero-profile ACDF, it systematically underestimates the true depth and fails to detect 25% of cases exceeding the 2-mm threshold, indicating that radiographs are suitable for routine surveillance but insufficient for definitively ruling out significant subsidence.