Correlations Among Ulnar Variance, Ulnar Styloid Length, and Lunate Type: Implications for Wrist Impaction Syndromes

Ulnar plus variance is common but infrequently causes symptoms, even in cases with neutral or negative ulnar variance, highlighting its dynamic nature. The USPI is the best measure for impaction risk, whereas SCR refines styloid assessment. Lunate type did not influence the decision for surgery, emphasizing the need for dynamic, multifactorial wrist evaluation for accurate diagnosis and management.