| Abstract ID |
| 20260006 |
| Category |
| Shoulder: Instability |
| Preferable Presentation |
| Both |
| Title |
| 3D PRINTING-ASSISTED ALL-ARTHROSCOPIC BONE BLOCK PROCEDURE FOR ATYPICAL LARGE GLENOID BONE LOSS. |
| Author |
|
| Presenter |
| ng poh hwee julia |
| Abstract |
| Background and Objectives Recent advancements in restoring critical glenoid bone loss suggest restoring the glenoid contour with anatomic glenoid reconstruction (AGR) with allografts, most notably a distal tibia allograft (DTA). In patients with atypical bone loss patterns where the injured surface is not flat, however, fashioning a bone graft of an accurate shape can be time-consuming. We present a technique using a 3D printed model for intraoperative reference in an arthroscopic AGR (AAGR)/DTA for a patient with atypical glenoid bone loss. Methods 3D models were printed of the injured glenoid, with and without the remnant glenoid fragment. The AAGR was done in a beach chair position. A rectangular bone block was sawed off the articular surface of a fresh-frozen DTA, and burred to accurate angles while referencing the sterile 3D printed models. The final graft was applied to the 3D model to confirm an accurate match. The graft was inserted into the patient via a Halifax portal, and fixed onto the recipient glenoid surface with one cortical screw. At three months, the patient had no recurrent dislocations, with good range of motion. Discussion All-arthroscopic AGR makes graft removal technically challenging, hence an accurate graft shape has to be achieved before insertion. Atypical bone loss patterns therefore require additional anatomical guides, which the 3D printed model is able to provide, to achieve graft accuracy. Conclusion An AAGR/ DTA for a patient with an atypical glenoid bone loss pattern is highly aided by a 3D printed anatomical model for accurate graft shaping, surgical efficiency, and good patient outcomes. |