3D printing-guided stent grafting vs. Sun procedure in type B aortic dissection: a propensity score-matched comparison.

INTRODUCTION

To compare perioperative outcomes and long‑term effects of 3D printing-guided personalised stent grafting versus conventional Sun procedure in type B aortic dissection (TBAD).

METHODS

From January 2018 to October 2024, 150 TBAD patients were enrolled: 84 underwent 3D printing-assisted stent grafting and 66 received the Sun procedure. After 1:1 propensity score matching (PSM), 74 pairs with balanced baseline characteristics were analysed. Surgical metrics, perioperative and follow‑up complications, aortic remodelling, and patient satisfaction were assessed.

RESULTS

Post‑matching, baseline data showed no significant differences (p > 0.05). Compared with the Sun group, the 3D printing group had shorter operative time, reduced blood loss, lower 24‑h drainage, shorter ventilator support, ICU stay, and hospitalisation (all p < 0.05). Complication rates were lower and patient satisfaction higher (*p < 0.05). At 6 and 12 months, the 3D printing group demonstrated greater true lumen expansion and false lumen reduction at the aortic isthmus and pulmonary artery bifurcation (*p < 0.05), with no difference in thrombosis rates (p > 0.05).

CONCLUSIONS

3D printing-assisted individualised stent grafting offers superior perioperative outcomes, fewer complications, enhanced aortic remodelling, and higher patient satisfaction compared with the Sun procedure, supporting its broader clinical application.