Purpose: With the growing technical options of power transmission and energy-saving options in electric drives, the number of E-bike-related accidents especially in an elderly population has increased. The aim of the current study was to compare if the increased velocity in comparison to conventional bikes translates into different injury patterns in the cranio-cervical and head region. Methods: A retrospective cohort study was performed in patients admitted to our level one trauma center between 2009 and 2019 after being involved in an accident with either an E-bike, bicycle, or motorcycle and suffered cranio-cervical or traumatic brain injury. Outcomes: cranio-cervical/intracranial injury pattern. Data interpretation was conducted in an interdisciplinary approach. Results: From 3292 patients treated in this period, we included 1068 patients. E-bikers were significantly older than bicyclists (or motorcyclists) and lay between the other two groups in terms of helmet use. Overall injury patterns of E-bikers resembled those found in motorcyclists rather than in bicyclists. E-bikers had a higher incidence of different cerebral bleedings, especially if no helmet was worn. Helmet protection of E-bikers resulted in a comparable frequency of intracranial bleeding to the helmeted bicyclists. Conclusion: The overall pattern of head and cervical injuries in E-bikers resembles more to that of motorcyclists than that of bicyclists. As they are used by a more senior population, multiple risk factors apply in terms of complications and secondary intracranial bleeding. Our study suggests that preventive measures should be reinforced, i.e., use of helmets to prevent from intracranial injury.

The aim of this study was to identify predictors of length of stay (LOS) after surgical therapy of maxillofacial abscess. Patients diagnosed with a maxillofacial abscess who underwent extraoral incision and drainage under general anesthesia between January 1st, 2012 and January 1st, 2022 were retrospectively reviewed Univariable and multivariable linear regressions were performed to identify the association between pre- and perioperative variables and the LOS. In total, 228 patients were included. In the forward stepwise multivariable analysis, all factors with a p -value <0.2 in the univariable model were included. Ultimately, six independent predictors of increased LOS were identified: female (coef. 0.14, 95% CI 0.03–0.25), immunosuppression (coef. 0.37, 95%CI 0.13–0.61), penicillin allergy (coef. 0.25, 95% CI 0.04–0.46), C-reactive protein (coef. 0.0008, 95% CI 0.0001–0.0014), multiple spaces involvement (coef. 0.36, 95% CI 0.13–0.59), and time to operation (coef. 0.005, 95% CI 0.002–0.008). In conclusion, our study provides new insights into predicting LOS for patients admitted with maxillofacial abscesses. The identification of these markers not only enhances the ability to forecast LOS, but also lays the groundwork for optimizing resource planning and potentially integrating them into a primary prevention algorithm.

Background/Objectives: Oral squamous cell carcinoma (OSCC) with bone infiltration is categorized as a T4 tumor regardless of its size. T4 tumors are an indication for postoperative radiotherapy, which could be overtreatment for small oral squamous cell carcinoma (SOSCC) with bone infiltration. Methods: A retrospective study of 189 patients with OSCC with the potential for mandibular infiltration was performed. The influence of the predictive variables on overall survival (OS) and disease-free survival (DFS) was assessed using the Kaplan–Meier method. A random forest approach was applied to determine the importance of each variable for survival in a multivariate context, and a partial correlation analysis was performed. Results: A statistical analysis of the effects of covariates suggested only a small influence of bone infiltration on OS. Patients with bone infiltration had a 5-year OS of 69%, and those without bone invasion had a 5-year OS of 71%. Age, lymph node metastasis, depth of invasion (DOI), and tumor size had the most decisive prognostic influence on survival. Conclusions: Bone infiltration appears to have less prognostic explanatory power than other known variables regarding OS. Therefore, adjuvant therapy should be carefully evaluated.

Background: Oral and cranio-maxillofacial (OCMF) surgery is a complex specialty that requires detailed anatomical knowledge and, in fracture care, the ability to interpret imaging accurately. Mixed reality (MR) may improve spatial understanding in anatomy-based disciplines, but its value for teaching mandibular fracture classification remains uncertain. Methods: Medical and dental students at the University of Zurich were randomized 1:1 to classify four unilateral mandibular fractures using either MR or conventional two-dimensional (2D) imaging. Primary outcomes were perceived usefulness, ease of use, learning, and user satisfaction, assessed with a 15-item usability questionnaire. Secondary outcomes were fracture-classification accuracy and time to fracture classification. Results: Forty medical and dental students were included. Baseline characteristics were comparable between groups, and overall fracture-classification accuracy did not differ significantly between MR and 2D. Both groups became faster across successive cases, indicating a learning effect, although the 2D group completed classifications more quickly overall. MR participants reported higher scores for learning and user satisfaction, whereas the 2D group rated ease of use more favorably. Conclusions: MR increased user satisfaction but did not improve fracture-classification accuracy compared with 2D imaging. When integrated thoughtfully into OCMF education, MR may complement, rather than replace, conventional imaging approaches.