STEREOLITHOGRAPHY IN ORAL AND MAXILLOFACIAL OPERATION PLANNING

Stereolithography (STL) is a meth od of organ-model-production based o n computed tomography scans which enables the representation of comple x 3-dimensional anatomical structures. Surfaces and internal structure s of organs can be produced by polymerization of UV-sensitive liquid r esin using a laser-beam. In oral and maxillofacial surgery this techni que is advantageous for reconstruction of severe skull defects because a more accurate preoperative planning is possible. Using recently dev eloped software we are able to reconstruct unilateral bony defects by virtual mirror imaging of the contralateral side and production of a S TL mirror model as well as the reconstruction of non-mirrorable defect s by superposition. Advantages of STL are the representation of comple x anatomical structures, high precision and accuracy, and the option t o sterilize the models for intraoperative use. More accurate planning using this method improves postoperative results, decreases risks and shortens treatment time.