Publications by authors named "Jan Oliver Voss"

Introduction: Open reduction and fixation are the standard of care for treating mandibular fractures and usually lead to successful healing. However, complications such as delayed healing, non-union, and infection can compromise patient outcomes and increase healthcare costs. The initial inflammatory response, particularly the response involving specific CD8 T cell subpopulations, is thought to play a critical role in healing long bone fractures.

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  • - Selective neck dissection (SND) is often preferred for patients with oral squamous cell carcinomas (OSCCs) who have clinically node-negative necks, while both SND and comprehensive neck dissection (CND) are used for those with clinically node-positive necks (cN+).
  • - A study analyzed 74 OSCC patients with positive neck nodes from 2010-2019, finding no significant differences in overall and disease-free survival between those undergoing CND and SND.
  • - The study identified extracapsular spread (ECS) and male sex as independent risk factors for poorer survival outcomes, indicating that both CND and SND could be effective for patients with positive lymph nodes
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  • The study aimed to create a systematic method to evaluate the bone healing process after bilateral sagittal split osteotomy (BSSO) using volumetric analysis.
  • Cone-beam computed tomography (CBCT) was utilized to capture data before, immediately after, and 6-12 months post-surgery, with both manual and semi-automatic image segmentation methods compared for effectiveness.
  • Results showed that the semi-automatic method had better consistency and repeatability than manual segmentation, suggesting it could improve the monitoring of bone healing in patients after BSSO.
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Prompt diagnosis and management of orbital entrapment fractures in the pediatric patient have been advocated. This retrospective study analyzed a cohort of orbital entrapment fractures in pediatric patients with regard to diagnostic pitfalls, treatment and outcomes in a Level I trauma center in Germany. Based on medical records and radiological imaging, patients under the age of 18 years who presented with orbital fractures during 2009-2021 were analyzed.

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Postoperative complications following mandibular fracture treatment vary from local wound infections to severe conditions including osteomyelitis and impaired fracture healing. Several risk factors have been associated with the development healing disorders, including fracture localisation, treatment modality and substance abuse. However, limited research on the sex-specific influence of these complications exists.

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Impaired bony healing following bilateral sagittal split osteotomy (BSSO) is a major unmet medical need for affected patients, and rare occurrences can hinder the identification of underlying risk factors. We hypothesised that osseous union following BSSO can be quantified using volumetric analysis, and we aimed to identify the risk factors for impaired bone healing. The percentage change in bony volume was measured in orthognathic patients following BSSO using two consecutive postoperative cone-beam computed tomography scans.

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Background: Mechanical and morphological factors have both been described to influence the rate of pseudarthrosis in mandibular reconstruction. By minimizing mechanical confounders, the present study aims to evaluate the impact of bone origin at the intersegmental gap on osseous union.

Methods: Patients were screened retrospectively for undergoing multi-segment fibula free flap reconstruction of the mandible including the anterior part of the mandible and osteosynthesis using patient-specific 3D-printed titanium reconstruction plates.

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Aim: To assess the diagnostic and therapeutic approaches in pediatric mandibular fractures with regards to fracture pattern and localization.

Patients And Methods: This retrospective study included patients under the age of 17 years that presented to the Department of Oral and Maxillofacial Surgery at Charité-Universitätsmedizin Berlin with mandibular fractures over an 11-year long period (2010-2020). Medical records were analyzed for age, gender, injury mechanism, clinical presentation, imaging modalities, fracture pattern, and fracture management.

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Bone defects of the craniofacial skeleton are often associated with aesthetic and functional impairment as well as loss of protection to intra- and extracranial structures. Solid titanium plates and individually adapted bone cements have been the materials of choice, but may lead to foreign-body reactions and insufficient osseointegration. In contrast, porous scaffolds are thought to exhibit osteoconductive properties to support bone ingrowth.

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Objectives: Different parameters have been identified in patients with oral squamous cell carcinomas (OSCC) that have a serious impact on survival, including residual tumour and extracapsular spread. Moreover, other factors, including the lymph node ratio (LNR) and lymph node yield (LNY), have been suggested as prognostic markers.

Material And Methods: This retrospective study included patients diagnosed with OSCC and cervical lymph node metastases during the years 2010-2020.

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  • Night-migratory birds, like the European robin, may detect Earth's magnetic field through a reaction in their eyes involving a protein called cryptochrome 4a (ErCry4a).
  • Researchers used various methods, including surface plasmon resonance and Förster resonance energy transfer, to study how ErCry4a interacts with a specific G protein in the retina.
  • The findings indicate a strong interaction between ErCry4a and the G protein, suggesting that this could be an initial step in the birds' ability to sense magnetic fields.
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Introduction: Facial nerve paralysis can dramatically affect the life of a patient as it leads to significant alterations of the facial symmetry and functional limitations. Various methods exist including free neuromuscular flaps to reanimate patients suffering from uni- or even bilateral facial nerve paralysis. The more than 60-year-old technique described by McLaughlin continues to offer an alternative with distinct advantages for the individual patient.

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Objectives: Pseudarthrosis after mandibular reconstruction leads to chronic overload of the osteosynthesis and impedes dental rehabilitation. This study evaluates the impact of gap site on osseous union in mandible reconstruction using a new volumetric analysis method with repeated cone-beam computed tomography (CBCT).

Methods: The degree of bone regeneration was evaluated in 16 patients after mandible reconstruction with a fibula free flap and patient-specific reconstruction plates.

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Open injuries bear the risk of foreign body contamination. Commonly encountered materials include gravel debris, glass fragments, wooden splinters or metal particles. While foreign body incorporation is obvious in some injury patterns, other injuries may not display hints of being contaminated with foreign body materials.

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  • The study assessed the effectiveness of X-ray, CT, and MRI in detecting foreign bodies, particularly those relevant to head and neck surgery.
  • Sensitivity for detecting foreign bodies was highest in MRI (97.1%), followed by CT (86.0%) and X-ray (61.8%), with MRI also showing better identification success rates.
  • MRI and CT provided better subjective visibility compared to X-ray, and there was a high level of agreement among readers for all imaging modalities.
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Purpose: Primary reconstruction via transconjunctival approach is a standardized treatment option for orbital floor fractures. The aim of this study was to compare the findings of specific ophthalmologic assessment with the patient's complaints after fracture reduction.

Methods: A retrospective medical chart analysis was performed on patients who had undergone transconjunctival orbital floor fracture reduction for fracture therapy with resorbable foil (ethisorb sheet or polydioxanone foil).

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Introduction: The treatment of facial fractures is an integral part of the oral and maxillofacial surgical treatment spectrum. In the case of complex fractures that involve multiple levels of the facial skeleton associated with severe concomitant injuries, an individual and interdisciplinary treatment approach is needed, which requires the infrastructure of a national trauma center.

Objective: The aim of this study was to analyze the incidence and management of patients with complex facial fractures and considering the concomitant injury pattern.

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Allogeneic hematopoietic stem cell transplantation (HSCT) is an established therapy and is without alternative for certain groups of patients. Successful HSCT induces both long-lasting remission and tolerance without the need for further immunosuppression. In this case, cellular repair and regenerative processes work in a physiologic manner allowing elective surgical procedures, such as the interdisciplinary correction of dentofacial anomalies.

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Objectives: Although many physicians in daily practice assume a connection between odontogenic infections and meteorological parameters, this has not yet been scientifically proven. Therefore, the aim of the present study was to evaluate the incidence of odontogenic abscess (OA) in relation to outdoor temperature and atmospheric pressure.

Patients And Methods: An analysis of patients with an odontogenic abscess who presented at the emergency department within a period of 24 months was performed.

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Introduction: Even today, despite medical progress and intensive health education, odontogenic infections leading to surgical intervention and hospitalization are common in children and young people. The aim of this study was to give a detailed overview of clinical and economic data on children and young people treated and hospitalized due to an odontogenic abscess at a tertiary university hospital.

Methods: A single-center retrospective analysis of patients under the age of 18 years who were hospitalized and surgically treated under local or general anesthesia for an odontogenic abscess during a period of 24 months was performed.

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Background: Congenital cysts and fistulas of the neck are common in children, often located in the head and neck area. Belonging to the group of tumor-like conditions, dermoid and epidermoid cysts are dysontogenetic lesions with seldom multiple co-occurrences in infants.

Case Report: We report on a nine-month-old female with a persisting congenital fistula of the tongue.

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Penetrating foreign bodies of different origins in the head and neck are rare and potentially dangerous injuries, which might pose problems for their detection, primary care, and final treatment. Depending on the severity of the underlying trauma, some injuries present a higher risk for the presence of foreign bodies. Minor wounds, including common lacerations, are likely to be contaminated with loose gravel debris or dental fragments, and need to be distinguished from severe wounds caused by impalement, shootings, stabbings, and explosions.

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Purpose: Despite the advantages and broad applications of alloplastic resorbable implants, postoperative radiological control is challenging due to its radiolucency. The aim of the present study was to evaluate the radiographic visibility of newly developed materials for orbital floor reconstruction.

Materials And Methods: The radiographic visibility of four different material combinations consisting of poly-(L-lactic acid)/poly-glycolic acid (PLLA/PGA) or poly(D,L-lactic acid) (PDLLA) enriched with magnesium (Mg), hydroxyapatite (HA) or β-tricalcium phosphate (β-TCP) with various layers of thicknesses (0.

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Background: Compromised wound healing in cranio-maxillo-facial surgery is a threat to the patient's rehabilitation. Therapy of chronic and/or infected wounds is time- and cost-consuming, burdensome and occasionally futile. Cold atmospheric plasma is a new approach that promises to overcome these limitations.

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