Simulative operation on congenital heart disease using rubber-like urethane stereolithographic biomodels based on 3D datasets of multislice computed tomography

Objective: Stereolithographic biomodelling is a technique where photosensitive liquid resin is polymerised with a pinpoint laser beam controlled by three-dimensional (3D) datasets. This study was designed to assess whether a stereolithographic biomodelling technique is applicable for precise anatomical diagnosis and simulation surgery of complicated congenital heart disease. Methods: Twelve stereolithographic biomodels were manufactured with multislice computed tomography (MSCT)-based 3D datasets. They were made of photosensitive liquid epoxy or urethane. Results: All the solid epoxy and rubber-like urethane biomodels reproduced the complex anatomical structures of the arteries and veins in congenital heart diseases. Furthermore, the rubber-like urethane biomodels allowed the surgeon to cut and suture, thus facilitating the simulation of the surgical operation. Conclusions: Stereolithographic biomodelling is a promising technique for the preoperative practice and simulation of individual surgery. This technique would be useful in the planning of novel and innovative surgical procedures of congenital heart disease.