The Utility of 3D-printed Cutting Guides in Genioglossus Advancement

Genioglossus advancement is a surgical technique performed to treat obstructive sleep apnea. The genial tubercle, where the genioglossus muscle attaches, is not visible during dissection due to its location on the posterior mandible. Computer-aided design, particularly for the production of cutting guides, has arisen as a modern modification in the procedure to support accurate location of the tubercle. This study aims to demonstrate the utility of cutting guides designed by virtual surgical planning in a series of 7 genioglossus advancement cases. Computed Tomography (CT) data were preoperatively collected and rendered in three-dimension. The surgeon designed patient-specific cutting guides, registered to the occlusion, to ensure the genial tubercle was included in the osteotomy and stayed below the incisor tooth roots. These surgical guides were then 3D-printed. All the virtual surgical planning-designed guides fit appropriately, the genial tubercle was successfully included in the osteotomy in all cases, and no tooth roots were injured. We conclude that occlusal-based 3D printed cutting guides are a useful adjunct to help guide a genioglossus advancement procedure by accurately incorporating the genial tubercle. This provides a safe way to concurrently address correction of obstructive sleep apnea in patients undergoing other procedures.