Search Results (4)

Introduction: The trigeminocardiac reflex (TCR) is a brainstem reflex in which trigeminal stimulation precipitates abrupt vagally mediated cardiovascular changes, ranging from bradycardia to asystole. While classically described during down-fracture or pterygomaxillary disjunction in Le Fort I osteotomy, rhinocardiac events from lateral nasal wall manipulation are less emphasized in orthognathic surgery. Case presentation: A 32-year-old man undergoing Le Fort I osteotomy developed ventricular asystole during lateral nasal osteotomy. The maneuver was stopped immediately; chest compressions and a single dose of epinephrine were administered, with return of spontaneous circulation within approximately one minute. Surgery was aborted and the patient was transferred to the surgical ICU. Clinical discussion: The temporal association with lateral nasal wall manipulation, in the setting of controlled hypotension and multimodal anesthesia, is most compatible with a peripheral (V2) TCR-type event, although drug-related and hemodynamic contributors cannot be excluded. A mini review of orthognathic TCR reports underscores recurring high-risk steps (down-fracture, pterygomaxillary disjunction, mandibular maneuvers) and highlights lateral nasal osteotomy as a potential additional trigger. Management principles remain the immediate cessation of the stimulus, optimization of oxygenation and ventilation, anticholinergics for bradycardia, and epinephrine/advanced cardiac life support for instability or arrest. Conclusion: Lateral nasal osteotomy may trigger a TCR-like event with severe bradyarrhythmia or asystole during Le Fort I osteotomy, particularly in hemodynamically vulnerable patients. Anticipation, swift recognition, and prompt, protocolized management are essential for favorable outcomes. Full article

Background: Osteotomy represents a crucial step in structural rhinoplasty; however, there is not a unique approach accepted. Double lateral osteotomy has proven to be effective in the long-term correction of a deviated nose. In this series, we evaluated its aesthetic value also in non-deviated cases. Materials and Methods: 864 patients who underwent primary structural rhinoplasty from 2012 to 2020 were divided into four groups. Group A and B included patients with a crooked nose treated with asymmetrical double osteotomy and bilateral double osteotomy, respectively. Patients who did not present nasal deviation were divided into group C, including cases treated with bilateral single osteotomy, and group D, including patients who underwent bilateral double osteotomy. Postoperative evaluations were performed by three independent plastic surgeons blinded to the surgical technique. Patient’s satisfaction was assessed through the FACE-Q rhinoplasty module. Results: FACE-Q scores reported a satisfaction rate higher than 30% for every item in all groups; however, group B and group D showed statistically higher satisfaction (p < 0.01). According to the evaluations performed by physicians, group B and group D showed the most satisfactory outcomes (p < 0.01). Conclusions: bilateral double osteotomies represent a significant aesthetic refinement in structural rhinoplasty, not only in crooked noses but also in non-deviated cases, since the reduction in the width of the nose is an aesthetical aspect very appreciated by patients. Full article

The atrophic edentulous maxilla is demanding for dental implant placement because of extensive resorption of the alveolar ridge after teeth loss and, consequently, the proximity of the anatomical structures, nasal cavity, and maxillary sinus. Treatment options are short implants, guided bone regeneration, onlay grafts, Le Fort I osteotomy with interpositional bone grafting, distraction osteogenesis, or nasal floor elevation. Nasal floor elevation is a method of augmentation of premaxilla by raising the base of the nose. The aim of this case report is to evaluate the success of implants placed after nasal floor elevation. A 75-year-old female patient came to the Clinical Department of Oral Surgery, University Hospital Centre Zagreb, unsatisfied with her complete removable denture. Clinical and radiological examination revealed severe maxillary alveolar ridge atrophy. Nasal floor elevation was made under local anesthesia through aperture piriformis and lateral window in the distal part. After eight months, four implants were placed and, after period of osseointegration, a bar-retained implant overdenture was made. This case report shows that nasal floor augmentation can be considered among the surgical techniques to allow implant-supported rehabilitation of the atrophic anterior maxilla. Full article

A FEA-based methodology was developed in order to predict the wear status of an osteotome (surgical instrument) during its use in a lateral nasal bone osteotomy considering its fatigue strength. The latter parameter was determined by appropriate FEM-evaluation of the perpendicular impact test results. For the simulation of the surgical procedure, two scenarios were examined: (i) when utilizing a brand new osteotome and (ii) when utilizing an already used osteotome characterized by decreased fatigue strength. The actual nasal bone geometry used in the FEA model was obtained from a high-resolution, maxillofacial, computed tomography (CT) scan of a single patient. In both cases examined, depiction of fracture patterns for the osteotome and the nasal bone were obtained. The wear of a new osteotome and an already used osteotome was also calculated and compared. The developed von Mises stresses in both the osteotome and nasal bone were depicted. The proposed methodology allowed an accurate prediction of the critical number of impacts that the osteotome can receive during the lateral nasal osteotomy which is followed in all rhinoplasties. Based on the developed methodology, a preventive replacement of the osteotome before its extensive fracture can be determined, thereby minimizing the risk of postoperative complications. Full article