## 1 Introduction
In this study, a single patient was treated with BSSO only. Otherwise, when both maxillary and mandibular osteotomies have been planned, an intermediate splint is necessary to guide the movement of one over the other. The maxilla is normally repositioned before the mandible; however, the sequence can be reversed using the appropriate intermediate splint. The remaining jaw is then repositioned according to the final splint. Once the maxilla and mandible are in the final positions, the surgeon evaluates the chin morphology, and, if modification is necessary, performs a genioplasty. Several studies demonstrated the reliability of customized surgical guides, abandoning the use of intermediate CAD/CAM splints [20; 21]. In addition, other authors proved the greater accuracy of customized surgical guides in transferring pre-surgical planning during surgery [22; 23]. Recently, some papers focused on the material using which the surgical guides were performed. Indeed, the mechanical properties of resins could influence the precision of surgical guides and, consequently, compromise accuracy during orthognathic surgery. For instance, both polishing and artificial aging could affect the properties of 3D-printed resins used for the realization of surgical guides [24]. As regards the complications, since orthognathic surgery consists of several steps, the drawbacks may be multiple and include bleeding, infections, scars, lack of union, incorrect division in bilateral sagittal split osteotomy, bone or dental relapse, neurological injuries, neuropathic pain, unsatisfactory results regarding nasal aesthetics, TMJ dysfunctions, necrosis of bone segments, respiratory stress, pseudoaneurysm, dental injuries, venous thromboembolism, and blindness [25; 26]. Complications during orthodontic surgery can occur before, during, or after the procedure. Complications that may arise before orthodontic surgery include the inadequate preparation of the teeth and surrounding structures, failure to address underlying dental or skeletal issues, or incorrect treatment planning. During the surgical procedures, there could be bleeding, nerve damage, infection, an adverse reaction to the used materials, or errors in technique. After surgery, complications may include delayed wound healing, infection, pain, swelling, and discomfort. In rare cases, some degree of jaw asymmetry could potentially persist or develop postoperatively if there are complications during surgery or there is insufficient stability in the surgical correction. It is important to note that orthognathic surgery is carefully planned and executed by experienced surgeons and orthodontists to achieve optimal results and minimize the risk of complications. Additionally, thorough postoperative care and follow-up are typically provided to monitor healing and address any concerns that may arise. Even seemingly more complex cases such as laterogenia can be treated with orthognathic surgery. The treatment of laterognathia involves the surgical repositioning of the jawbones to correct the lateral asymmetry. This surgery aims to realign the jaws and improve facial harmony and function. Orthodontic treatment may also be part of the comprehensive treatment plan to optimize tooth alignment before and after surgery, as described in this study. The successful surgical correction of dentoskeletal malocclusions is also determined by proper pre-surgical treatment in order to eliminate dental compensation. Orthognathic surgery requires a preoperative orthodontic phase lasting an average of two years, during which a dental decompensation must be obtained, thus aggravating the dental Class III. The orthodontist has to create appropriate dental decompensation, dentition alignment, and coordination of the upper and lower arches for postoperative stability, causing temporary malocclusion worsening and a strongly negative overjet [27; 28]. The orthodontic phase is mostly performed using fixed appliances.