Perceived vs. true glenoid anchor placement: a cadaveric comparison of the beach chair and lateral position.

Purpose: To explore whether patient position influences a surgeon's ability to accurately judge anchor position on the glenoid.

Materials And Methods: Two anchors were inserted into the glenoid of 8 shoulders. Arthroscopic videos were taken from 3 views (posterior beach chair [pBC], posterior lateral decubitus [pLD], and anterosuperolateral decubitus [asLD]).