Three-dimensional navigation in maxillofacial surgery - the way to minimize surgical stress and improve accuracy in fibula free flap and Eagles syndrome surgical procedures.

[BACKGROUND] Surgical navigation with three-dimensional (3D) printing techniques presents two major advantages: First, from a technical aspect, it facilitates orientation in target anatomical structures resulting in improvement of the accuracy of surgery. Moreover, it shortens the time of complex surgical interventions by preparing the exact position of customized autologous grafts with fixation devices. Second, from a clinical point of view, it also lessens the impact of surgical stress to adjacent tissues by decreasing the duration of surgery.

[MATERIAL AND METHODS] Two maxillofacial procedures were evaluated in this study using 3D navigation and planning approach - resection of the styloid process due to Eagles syndrome and microvascular mandibular reconstruction with the fibula free flap. All patients who underwent these procedures were divided into two groups (with or without 3D navigation).

[RESULTS] In the Eagles syndrome group procedure independent t-test showed  significant difference in the operating time between group 1 (M = 148; SD = 0) and group 2 (M = 78; SD = 4.24) t (1) = 13.472; P = 0.047. There was no significant difference in the duration of postoperative hospitalization (2 days), which was equal in all patient groups. Regarding the fibula free flap procedure, the independent t-test revealed significant difference in operating time with (M = 8: 40 : 25; SD = 0 : 58 : 07) and without 3D printing guides (M = 10 : 43 : 15; SD = 3 : 04 : 32) t (14)=2.133, P = 0.051. Similarly, there was no significant difference between groups (group 1 M = 15.5; SD = 0,71; group 2 M = 13; SD = 1,63) in the duration of postoperative hospitalization time t (4) =1,98; P = 0.119.

[CONCLUSION] In summary, reduction in operation time in Eagles syndrome and in microvascular mandibular reconstruction with the fibula free flap group mitigates the surgical stress on target tissues enabling faster tissue healing and quicker recovery.