Use of 3-Dimensional Printing for Preoperative Planning in the Treatment of Recurrent Anterior Shoulder Instability  Ujash Sheth, M.D., John Theodoropoulos, M.D., M.Sc., F.R.C.S.C., Jihad Abouali, M.D., F.R.C.S.C.  Arthroscopy Techniques  Volume 4, Issue 4, Pages e311-e316 (August 2015) DOI: 10.1016/j.eats.2015.03.003 Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 1 Radiographs showing (A) anteroposterior, (B) trans-scapular, and (C) axillary views of right shoulder. A large Hill-Sachs lesion (red arrow) and small Bankart lesion (black arrow) are visible on the axillary view. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 2 Computed tomography scan showing (A) coronal and (B) axillary views of right shoulder. A small bony Bankart lesion (blue arrow) is visible on the coronal view. A large Hill-Sachs lesion (red arrow) is seen on the axillary view. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 3 Magnetic resonance imaging scans depicting (A) axillary and (B) sagittal views of right shoulder. A large Hill-Sachs lesion (red arrow) is seen on the axillary view. A small bony Bankart lesion (blue arrow) is seen on the sagittal view. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 4 Three-dimensional computed tomography scan reconstruction of right shoulder: (A) superior, (B) oblique, and (C) anteroposterior views. A large Hill-Sachs lesion is visualized on the superior view (arrow). Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 5 Solid 3-dimensional printed model of right shoulder: (A) anterior view, (B) sagittal view with humeral head removed showing bony Bankart lesion (blue arrow), (C) superior view, and (D) superior view of humeral head showing large Hill-Sachs lesion (red arrows). Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 6 View of intraoperative setup for procedure. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 7 Glenolabral articular disruption (GLAD) and bony Bankart lesion seen during diagnostic arthroscopy while viewing through posterior portal. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 8 Solid 3-dimensional printed model of right shoulder in external rotation with Hill-Sachs lesion fully engaged (arrow). Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions

Fig 9 View through anterosuperior viewing portal during placement of first suture anchor (performed through posterolateral portal). The area of the Hill-Sachs lesion is highlighted in red on the 3-dimensional model (inset), with yellow circles designating the 2 positions of the suture anchors. Arthroscopy Techniques 2015 4, e311-e316DOI: (10.1016/j.eats.2015.03.003) Copyright © 2015 Arthroscopy Association of North America Terms and Conditions