Evaluating computer‑assisted mandibular reconstruction: Outsourced vs. in‑house approaches

Mandibular reconstruction following segmental resection, often necessitated by oral malignancies, is a complex procedure that markedly affects postoperative function and aesthetics. Computer-assisted surgery (CAS) has emerged as a valuable tool for enhancing surgical precision in oncological head and neck reconstruction. The present study evaluated the accuracy of mandibular reconstruction using three approaches: Conventional (non-CAS), outsourced CAS (TruMatch) and an in-house CAS system developed at The University of Osaka Graduate School of Dentistry (Suita, Japan). A total of 32 cases, predominantly involving malignant tumors, were retrospectively analyzed using three-dimensional model overlay techniques to compare pre- and postoperative outcomes. While both CAS methods significantly improved accuracy compared with the non-CAS approach, no statistical difference was found between the outsourced and in-house CAS groups. These findings suggested that in-house CAS systems can achieve comparable precision to commercial solutions, offering a cost-effective and accessible alternative for advanced mandibular reconstruction in oncology settings. The results support broader adoption of in-house CAS approaches, particularly in time-sensitive or resource-limited cancer surgeries.