Accuracy of virtual surgical planning in bimaxillary orthognathic surgery with mandible first sequence: A retrospective study.

The aim of this study was to verify treatment accuracy using virtual surgical planning (VSP) with a mandible-first sequence and strict surgical protocol to determine what surgical and methodological factors might influence outcomes. VSP transfer accuracy was evaluated retrospectively through a modified method involving voxel-based superimposition in patients who had undergone bimaxillary surgery with a mandible-first sequence to correct dentoskeletal deformities. Data analysis showed that the movements planned and those executed were substantially equivalent (p < 0.01), with the exception of mandibular and maxillary sagittal movements that were 0.72 ± 0.90 mm and 1.41 ± 1.04 mm smaller, respectively, than planned. This study showed that a mandible-first sequence is accurate for transferring virtual surgical planning intraoperatively. There are several factors involved in the proper transfer of virtual planning beyond the software, such as surgical technique and sequencing. Inaccurate sagittal movements and maxillary repositioning seem to depend mainly on surgical factors.

Correction to: Treatment of stage II medication-related osteonecrosis of the jaw with necrosectomy and autologous bone marrow mesenchymal stem cells.

In the Original publication of the article, the co-author has been misspelled as Fabian Duttenhöfer in the article "Treatment of stage II medication-related osteonecrosis of the jaw with necrosectomy and autologous bone marrow mesenchymal stem cells" published in October 2017, Volume 105, Issue 4 of Odontology. The correct name is "Fabian Duttenhoefer".

Treatment of stage II medication-related osteonecrosis of the jaw with necrosectomy and autologous bone marrow mesenchymal stem cells.

Treatment strategies for medication-related osteonecrosis of the jaw (MRONJ) remain controversial. Although the AAOMS suggests a conservative approach, a surgical management with necrosectomy is often required when conservative management has failed. Moreover, recent studies have shown promising results using an early stage surgical treatment. Over the past decade, cell-based bone regeneration utilizing bone marrow mesenchymal stem cells (MSCs) received increased attention. MSCs are known to promote wound healing and induce new bone formation in compromised tissue. Accordingly, the aim of this study was to assess the role of MSCs in the management of MRONJ. This study included 6 patients referred to our department with the diagnosis of MRONJ. Upon informed consent, the patients underwent surgical resection of necrotic bone followed by MSCs grafting. The MSCs were separated from bone marrow cells aspirated from the iliac crest using a bone marrow aspirate concentrate system. The MSCs were grafted into the defect with autologous thrombin and the defect was covered with a collagen membrane. In all cases, bony edges were rounded and the wound was closed using a three-layered technique. In the follow-up from 12 to 54 months, all patients including those who had impaired conditions, sepsis, or pathological fracture, showed satisfactory healing with no signs of wound infection. This pilot study indicated that surgical management in combination with MSCs transplantation seems to be a promising treatment modality in the therapy of MRONJ.

Hallazgos compatibles con material de osteosíntesis en 10.000 radiografías panorámicas: un estudio descriptivo en Bogotá, Colombia / Findings of osteosynthesis material in 10,000 panoramic x-rays: a descriptive study in Bogotá, Colombia

La radiografía panorámica ha adquirido un gran valor diagnóstico por su bajo costo y detección de hallazgos que no son detectables en la clínica. En cirugía maxilofacial son de utilidad en el seguimiento de procedimientos quirúrgicos mayores ya que permiten visualizar los materiales de osteosíntesis y determinar las patologías óseas con indicaciones quirúrgicas. Objetivo: determinar la prevalencia de material de osteosíntesis en radiografías panorámicas de adultos, buscando su asociación con trauma, anomalía dentofacial, patología quirúrgica y defecto óseo. Método: se valoraron 10.000 radiografías, clasificándolas por sexo, edad y diagnóstico presuntivo. Resultados: se encontraron 173 radiografías con hallazgos de fijación rígida en su mayoría mujeres, entre 21-30 años. Los hombres sufren más trauma mientras que la cirugía ortognática se hace más en mujeres. Conclusión: El material de osteosíntesis se asocia más a corrección de anomalías dentomaxilofaciales en mujeres jóvenes, mientras que la fijación interna rígida asociada a patología quirúrgica es de baja prevalencia...

Panoramic radiography has acquired great diagnostic value given its low cost and its capacity to detect findings that are non-detectable in clinical practice. In maxillofacial surgery, they are useful to monitor major surgical procedures as they enable professionals to detect osteosynthesis materials and thus determine bone diseases with surgical indications.Objective: to determine the prevalence of osteosynthesis material in panoramic radiographs of adult patients, looking for its association with bone defects, surgical pathology, dentofacial anomaly and trauma. Method: 10,000 x-rays were evaluated and classified according to sex, age and presumptive diagnosis. Results: there were 173 x-rays with findings of rigid fixation, mostly among women aged between 21 and 30. Men tend to suffer more from trauma, while orthognathic surgery is more prevalent among women. Conclusion: Osteosynthesis material is more often associated with the correction of dentomaxillofacial anomalies in young women, while the rigid internal fixation associated with surgical pathology has low prevalence...