The Vega advanced third generation posterior stabilized total knee arthroplasty system enables the restoration of range of motion for high demanding daily activities - A 5-years follow-up study.

Background: The Vega System® PS (Aesculap AG, Tuttlingen, Germany) is an advanced, third generation fixed implant that aims to mimic natural knee kinematics by optimizing pivotal motion while reducing surface stress. This study evaluated mid-term survival and clinical outcomes, including range of motion (ROM) of the modern posterior stabilized implant in order to analyse whether this biomechanically successful implant reaches good results in situ.

Methods: The first 100 patients to receive the Vega PS System for total knee arthroplasty were invited to take part in this single centre, single surgeon study.

Comparison of 2 Clinically Applied Biomaterials for Autologous Chondrocyte Implantation: Injectable Hydrogel Versus Collagen Scaffold.

Objective: In autologous chondrocyte implantation (ACI), there is no consensus about used bioscaffolds. The aim of this study was to perform an comparative analysis of 2 clinically applied biomaterials for cartilage lesion treatment.

Design: Monolayer expanded human chondrocytes ( = 6) were embedded in a collagen scaffold (CS) and a hyaluronic acid-based hydrogel (HA).

Predicting tracheostomy in multiple injured patients with severe thoracic injury (AIS ≥ 3) with the new TP-Score: a multivariable regression prediction analysis.

Multiple trauma patients with severe chest trauma are at increased risk for tracheostomy. While the risk factors associated with the need for tracheostomy are well established in the general critical care population, they have not yet been validated in a cohort of patients suffering severe thoracic trauma. This retrospective cohort study analysed data on patients aged 18 years or older who were admitted to one of the six participating academic level I trauma centres with multiple injuries, including severe thoracic trauma (AIS ≥ 3) between 2010 and 2014.

Percutaneous thoraco-lumbar-sacral pedicle screw placement accuracy results from a multi-center, prospective clinical study using a skin marker-based optical navigation system.

Study Design: Prospective multi-center study.

Objective: The study aimed to evaluate the accuracy of pedicle screw placement using a skin marker-based optical surgical navigation system for minimal invasive thoraco-lumbar-sacral pedicle screw placement.

Methods: The study was performed in a hybrid Operating Room with a video camera-based navigation system integrated in the imaging hardware.

Retrospective Mid-Term Follow-Up of Posttraumatic and Iatrogenic Neurovascular Complications in Surgically Treated Paediatric Patients with Distal Humerus Fracture.

Background: The purpose of the study was to investigate and describe neurovascular complications and mid-term clinical outcomes of operatively managed fractures of the distal humerus in a paediatric population. Neurovascular injuries are common in these fractures, but reports about their implications for mid-term clinical outcomes is sparse.

Methods: A single-centre retrospective study was conducted at a university teaching hospital investigating paediatric patients who underwent operative management of a distal humerus fracture between 2014 and 2018.

Regenerative Potential of Platelet Concentrate Lysate in Mechanically Injured Cartilage and Matrix-Associated Chondrocyte Implantation In Vitro.

Adjuvant therapy in autologous chondrocyte implantation (ACI) can control the post-traumatic environment and guide graft maturation to support cartilage repair. To investigate both aspects, we examined potential chondro-regenerative effects of lysed platelet concentrate (PC) and supplementary interleukin 10 (IL-10) on mechanically injured cartilage and on clinically used ACI scaffolds. ACI remnants and human cartilage explants, which were applied to an uniaxial unconfined compression as injury model, were treated with human IL-10 and/or PC from thrombocyte concentrates.

Does the time of the day affect multiple trauma care in hospitals? A retrospective analysis of data from the TraumaRegister DGU®.

Background: Optimal multiple trauma care should be continuously provided during the day and night. Several studies have demonstrated worse outcomes and higher mortality in patients admitted at night. This study involved the analysis of a population of multiple trauma patients admitted at night and a comparison of various indicators of the quality of care at different admission times.

Long-term Efficacy of Percutaneous Epidural Neurolysis of Adhesions in Chronic Lumbar Radicular Pain: 10 Year Follow-up of a Randomized Controlled Trial.

Background: No long-term follow-up data exist in any treatment for chronic radicular pain occurring with disc pathology and after failed back surgery. A previous randomized controlled trial (RCT) has proven efficacy in short-term follow-up as an evidence-based effective therapeutic option.

Objectives: Long term data is needed to determine the efficacy and cost- effectiveness of minimal invasive procedures.

Missed hand and forearm injuries in multiple trauma patients: An analysis from the TraumaRegister DGU®.

Purpose: Multiple trauma patients have a high risk of missed injuries. The main point of our study was to provide new epidemiological data on hand and forearm injuries in multiple trauma with a focus on those that were missed. Therefore, we used the database of the TraumaRegister DGU®.

Accuracy of augmented reality surgical navigation for minimally invasive pedicle screw insertion in the thoracic and lumbar spine with a new tracking device.

Background Context: Minimally invasive approaches are increasingly used in spine surgery. The purpose of navigation systems is to guide the surgeon and to reduce intraoperative x-ray exposure.

Purpose: This study aimed to determine the feasibility and clinical accuracy of a navigation technology based on augmented reality surgical navigation (ARSN) for minimally invasive thoracic and lumbar pedicle screw instrumentation compared with standard fluoroscopy-guided minimally invasive technique.

[Hybrid operating room : Application in trauma surgery and orthopaedics].

Background: For some years now, more and more hospitals in Germany have acquired so-called hybrid operating rooms. In these operating rooms it is possible to produce three-dimensional imaging during the operation. Originally developed for cardiovascular surgery, these rooms are increasingly being used for interdisciplinary purposes.

Pneumonia in severely injured patients with thoracic trauma: results of a retrospective observational multi-centre study.

Background: While the incidence and aspects of pneumonia in ICU patients has been extensively discussed in the literature, studies on the occurrence of pneumonia in severely injured patients are rare. The aim of the present study is to elucidate factors associated with the occurrence of pneumonia in severely injured patients with thoracic trauma.

Setting: Level-I University Trauma Centres associated with the TraumaRegister DGU®.

A new multiple trauma model of the mouse.

Background: Blunt trauma is the most frequent mechanism of injury in multiple trauma, commonly resulting from road traffic collisions or falls. Two of the most frequent injuries in patients with multiple trauma are chest trauma and extremity fracture. Several trauma mouse models combine chest trauma and head injury, but no trauma mouse model to date includes the combination of long bone fractures and chest trauma.

Hepatocytes express the antimicrobial peptide HBD-2 after multiple trauma: an experimental study in human and mice.

Background: Human-beta defensins (HBD) belong to the family of acute phase peptides and hold a broad antimicrobial spectrum that includes gram-positive and gram-negative bacteria. HBD are up-regulated after severe injuries but the source of posttraumatic HBD expression has not been focused on before. In the current study we analysed the role of liver tissue in expression of HBD after multiple trauma in human and mice.

Epidemiology of accidental hypothermia in polytrauma patients: An analysis of 15,230 patients of the TraumaRegister DGU.

Background: Accidental hypothermia (AH) endangers the patient after polytrauma. Past studies have emphasized this entity as a major risk factor. The aim of this study was to describe the epidemiology of AH in major trauma considering the preclinical and clinical course.

Local pamidronate influences fracture healing in a rodent femur fracture model: an experimental study.

Background: Bisphosphonates are a main component in the therapy of osteoporosis and other bone resorptive diseases. Previous studies have shown a positive effect of systemically applied bisphosphonates on fracture healing. Nevertheless high doses are related to side effects like osteonecrosis of the jaw, nephrotoxis and gastrointestinal symptoms.

Induced Hypothermia Preserves the Functional Enterocyte Mass in A Porcine Multiple Trauma Model: Retracted.

Introduction: Multiple organ dysfunction syndrome (MODS) and the resulting multiple organ failure (MOF) following severe trauma are associated with increased morbidity and mortality. Due to intestinal mucosal lesions and gut barrier disorders, the intestine contributes decisively to how post-traumatic MOF develops. As mild therapeutic hypothermia has been found to have protective effects on post-traumatic organ injuries, we analysed its effects on the intestine.

The Use of Extracorporeal Membrane Oxygenation Systems in Severe Accidental Hypothermia After Drowning: A Centre Experience.

Cardiopulmonary failure because of drowning with accidental hypothermia (AH) remains a major task for emergency care physicians. In this case series, we describe our experience in nine patients with cardiopulmonary failure after drowning with AH less than 35°C, who were provided on an emergency basis with extracorporeal life support (ECLS) system or extracorporeal membrane oxygenation (ECMO). Conservative rewarming methods are not considered for this study.

Reduction and retention of thoracolumbar fractures by minimally invasive stabilisation versus open posterior instrumentation.

Purpose: The purpose of this study was in thoracolumbar fractures to assess the effectiveness of minimal invasive stabilisation compared to the open technique with regards to the change in kyphosis angle, the loss of reduction and length of hospital stay.

Methods: The retrospective study consisted of 104 patients who received minimally invasive stabilisation or open stabilisation. Patients were between 15 and 86 years of age, had a thoracolumbar fracture and no neurological deficits.

Induced Hypothermia Does Not Harm Hemodynamics after Polytrauma: A Porcine Model.

Background: The deterioration of hemodynamics instantly endangers the patients' life after polytrauma. As accidental hypothermia frequently occurs in polytrauma, therapeutic hypothermia still displays an ambivalent role as the impact on the cardiopulmonary function is not yet fully understood.

Methods: We have previously established a porcine polytrauma model including blunt chest trauma, penetrating abdominal trauma, and hemorrhagic shock.

Rivaroxaban does not impair fracture healing in a rat femur fracture model: an experimental study.

Background: The prescription of the oral anticoagulant rivaroxaban to prevent thromboembolic episodes associated with orthopaedic surgery has dramatically increased since it was introduced. Rivaroxaban is beeing prescribed although recent in-vitro studies revealed that it impaired osteoblast metabolism. In this study we analysed the effect of rivaroxaban on fracture healing in a rat femur fracture model.

The antimicrobial peptide lysozyme is induced after multiple trauma.

The antimicrobial peptide lysozyme is an important factor of innate immunity and exerts high potential of antibacterial activity. In the present study we evaluated the lysozyme expression in serum of multiple injured patients and subsequently analyzed their possible sources and signaling pathways. Expression of lysozyme was examined in blood samples of multiple trauma patients from the day of trauma until 14 days after trauma by ELISA.

Induced hypothermia reduces the hepatic inflammatory response in a swine multiple trauma model.

Background: Mild therapeutic hypothermia following trauma has been introduced in several studies to reduce the posttraumatic inflammation and organ injury. In this study, we analyzed the effects of induced mild hypothermia (34°C) on the inflammation of the shock organs liver and kidney.

Methods: In a porcine model of multiple trauma including blunt chest trauma, liver laceration, and hemorrhagic shock followed by fluid resuscitation, the influence of induced hypothermia on hepatic and renal damage and organ-specific inflammation were evaluated.