**5. Simulated surgery in stereolithographic biomodels**

Stereolithography is a solid three-dimensional prototype obtained through the processing of data obtained from computed tomography or magnetic resonance imaging. In recent years, stereolithographic manufacturing has made great strides in the quality, resolution, and precision of manufactured parts and is becoming increasingly important in medicine and surgery [31].

#### **Figure 3.**

*Simulated surgery in stereolithographic biomodel. Zygomatic and Pterygomaxillary implants placed in the planned positions.*

**Figure 4.** *Photograph of surgical field after placement of zygomatic and Pterygomaxillary implants.*

Three-dimensional printing has been used to produce anatomical models, surgical guides and templates, implants, and molds. The main advantages include: the possibility of preoperative planning, the precision of the process used and the time saved in the operating room. However, other studies report inconsistency in precision and additional costs in treatment [32].

The maxillofacial reconstruction with osseointegrated implants simulated in a biomodel, allows to determine the lengths and final positions of the implants, prepare the surgeon for the surgical procedure and minimize the possibilities of errors favoring the results of the treatment (**Figures 3** and **4**)**.**
