CT Scan Method Accurately Assesses Humeral Head Retroversion

P. Boileau MD, R. T. Bicknell MD, MSc, FRCSC, N. Mazzoleni MD, G. Walch MD, J. P. Urien MD
Symposium: New Approaches to Shoulder Surgery
Volume 466, Issue 3 / March , 2008

Abstract on SpringerLink | Full article HTML | Full article PDF

Download Citation

Abstract

Humeral head retroversion is not well described with the literature controversial regarding accuracy of measurement methods and ranges of normal values. We therefore determined normal humeral head retroversion and assessed the measurement methods. We measured retroversion in 65 cadaveric humeri, including 52 paired specimens, using four methods: radiographic, computed tomography (CT) scan, computer-assisted, and direct methods. We also assessed the distance between the humeral head central axis and the bicipital groove. CT scan methods accurately measure humeral head retroversion, while radiographic methods do not. The retroversion with respect to the transepicondylar axis was 17.9° and 21.5° with respect to the trochlear tangent axis. The difference between the right and left humeri was 8.9°. The distance between the central axis of the humeral head and the bicipital groove was 7.0 mm and was consistent between right and left humeri. Humeral head retroversion may be most accurately obtained using the patient’s own anatomic landmarks or, if not, identifiable retroversion as measured by those landmarks on contralateral side or the bicipital groove.

Go to Issue Contents