111 results match your criteria: "Faculty of Medicine University of Freiburg[Affiliation]"

Synchrotron-based micro computed tomography investigation of the implant-abutment fatigue-induced microgap changes.

J Mech Behav Biomed Mater

April 2021

Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Freiburg, Germany.

Objective: This study evaluates the effect of dynamic-loading on the microgap of the IAC when different supratructure heights are applied.

Materials And Methods: Forty-eight dental implants (24 each of butt-joint (H) and internal-conical connections (C)) were tested in this study. Each group was further divided into three groups (n = 8) according to the applied suprastructure height (H1, C1: 10 mm, H2, C2: 14 mm and H3, C3: 18 mm).

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Retrospective long-term clinical evaluation of implant-prosthetic rehabilitations after head and neck cancer therapy.

Clin Oral Implants Res

April 2021

Department of Oral and Maxillofacial Surgery, Berlin Institute of Health, Corporate Member of Freie Universität Berlin, Charité - Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.

Objective: To assess clinical and patient-reported outcomes of implant-prosthetic rehabilitations in patients with a history of head-neck cancer (HNC), treated with tumor resection without (TR) or with adjuvant radiotherapy (TR/RT). A healthy cohort rehabilitated with the same reconstructive protocols served as control group (C).

Materials And Methods: A total of 28 women and 29 men were considered in the present retrospective study.

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S2K Guideline for Diagnosis of Idiopathic Pulmonary Fibrosis.

Respiration

December 2021

Center for Interstitial and Rare Lung Diseases, Pneumology Department, Ruhrlandklinik - University Hospital, University Duisburg-Essen, Essen, Germany.

Idiopathic pulmonary fibrosis (IPF) is a severe and often fatal disease. Diagnosis of IPF requires considerable expertise and experience. Since the publication of the international IPF guideline in the year 2011 and the update 2018 several studies and technical advances have occurred, which made a new assessment of the diagnostic process mandatory.

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Introduction: An accurate delineation of the intraprostatic gross tumor volume (GTV) is of importance for focal treatment in patients with primary prostate cancer (PCa). Multiparametric MRI (mpMRI) is the standard of care for lesion detection but has been shown to underestimate GTV. This study investigated how far the GTV has to be expanded in MRI in order to reach concordance with the histopathological reference and whether this strategy is practicable in clinical routine.

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Cognitive and behavioral effects of cannabidiol in patients with treatment-resistant epilepsy.

Epilepsy Behav

January 2021

Epilepsy Center, Medical Center-University of Freiburg, Faculty of Medicine University of Freiburg Germany, Breisacher Straße 64, 79106 Freiburg, Germany; Department of Neuropediatrics and Muscle Disorders, Medical Center-University of Freiburg, Faculty of Medicine University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany; Berta-Ottenstein-Programme, Faculty of Medicine, University of Freiburg, Germany.

Purpose: Therapeutic use of cannabidiol (CBD) in intractable epilepsies has increased considerably over the last ten years. As more evidence for the potentially beneficial effects of CBD on different epilepsy types is emerging, it is important to monitor potential cognitive and behavioral side effects. So far, studies including standardized neuropsychological data in the context of treatment with CBD in epilepsy patients are sparse.

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The uremic toxins indoxyl sulfate (IS) and p-cresyl sulfate (pCS) accumulate in patients with chronic kidney disease (CKD) as a consequence of altered gut microbiota metabolism and a decline in renal excretion. Despite of solid experimental evidence for nephrotoxic effects, the impact of uremic toxins on the progression of CKD has not been investigated in representative patient cohorts. In this analysis, IS and pCS serum concentrations were measured in 604 pediatric participants (mean eGFR of 27 ± 11 ml/min/1.

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The influence of prosthetic crown height and implant-abutment connection design selection on the long-term implant-abutment stability: A laboratory study.

J Mech Behav Biomed Mater

January 2021

Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany. Electronic address:

Background And Aim: Long-term edentulism associated with vertical loss of alveolar bone might lead to increased suprastructure height. This study aimed to evaluate the effect of suprastructure height on the stability of the implant-abutment connection by investigating the stability of two different two-piece titanium implants with internal hexagonal or conical connections under simulated oral loading conditions.

Materials And Methods: A total of 48 specimens were used.

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Background: The 5-FU, Leucovorin, Oxaliplatin and Docetaxel (FLOT) protocol provides superior oncologic results compared to other perioperative chemotherapeutic protocols for the treatment of non-metastatic esophagogastric cancer (EGAC). Survival and the pattern of recurrence of EGAC after FLOT and curative tumor resection are analyzed in a collective of patients treated outside clinical trials.

Methods: Two-hundred-seventy-seven patients with EGAC (cT3-4 and/or cN+) were treated with perioperative FLOT-chemotherapy plus curative surgery between 2009 and 2018.

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Clinical Outcomes of Root-Analogue Implants Restored with Single Crowns or Fixed Dental Prostheses: A Retrospective Case Series.

J Clin Med

July 2020

Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center-University of Freiburg, Faculty of Medicine-University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany.

The objective was to investigate clinical and radiological outcomes of rehabilitations with root-analogue implants (RAIs). Patients restored with RAIs, supporting single crowns or fixed dental prostheses, were recruited for follow-up examinations. Besides clinical and esthetical evaluations, X-rays were taken and compared with the records.

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How Accurate Is Oral Implant Installation Using Surgical Guides Printed from a Degradable and Steam-Sterilized Biopolymer?

J Clin Med

July 2020

Department of Prosthodontics, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Geriatric Dentistry and Craniomandibular Disorders, 14197 Berlin, Germany.

3D printed surgical guides are used for prosthetically-driven oral implant placement. When manufacturing these guides, information regarding suitable printing techniques and materials as well as the necessity for additional, non-printed stock parts such as metal sleeves is scarce. The aim of the investigation was to determine the accuracy of a surgical workflow for oral implant placement using guides manufactured by means of fused deposition modeling (FDM) from a biodegradable and sterilizable biopolymer filament.

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Expectations and knowledge of cannabidiol therapy for childhood epilepsy - A German caregiver survey.

Epilepsy Behav

October 2020

Department of Neuropediatrics and Muscle Disorders, Medical Center-University of Freiburg, Faculty of Medicine University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany; Faculty of Medicine, University of Freiburg, Germany; Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Canada.

Background: Cannabidiol (CBD) has gained popularity among parents of children with epilepsy, even before evidence of efficacy and safety was available. The aim of our survey was to gain information about parental attitude to CBD, as well as expectations and knowledge of CBD for treatment of their child's epilepsy.

Methods: A survey using an open-access online questionnaire for parents or caregivers of children with epilepsy within German-speaking countries from March to June 2019 was used.

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A case of co-occuring synesthesia, autism, prodigious talent and strong structural brain connectivity.

BMC Psychiatry

June 2020

Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research; Department of Women's and Children's Health, Karolinska Institutet, Stockholm Health Care Services, Region Stockholm, Stockholm, Sweden.

Background: Synesthesia is a sensory phenomenon where certain domain-specific stimuli trigger additional sensations of e.g. color or texture.

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The tensile strength of the intervertebral disc (IVD) is mainly maintained by collagen cross-links. Loss of collagen cross-linking combined with other age-related degenerative processes contributes to tissue weakening, biomechanical failure, disc herniation and pain. Exogenous collagen cross-linking has been identified as an effective therapeutic approach for restoring IVD tensile strength.

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Lipoprotein Lipase Deficiency.

Indian J Pediatr

February 2021

Department of Pediatric Genetics, Amrita Institute of Medical Sciences & Research Centre, Aims Ponekkara PO, Cochin, Kerala, 682041, India.

Objectives: To analyse the clinical and molecular spectrum of Lipoprotein Lipase (LPL) deficiency and to highlight the effect of a cost-effective indigenous diet for management of this disorder.

Methods: This is a single-centre retrospective study. Fifteen patients from 14 kindreds with severe hypertriglyceridemia (more than 1000 mg/dl) were evaluated for a period of 12.

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Fully guided implant surgery using Magnetic Resonance Imaging - An in vitro study on accuracy in human mandibles.

Clin Oral Implants Res

August 2020

Department of Oral and Maxillofacial Surgery, Translational Implantology, Medical Center-University of Freiburg, Faculty of Medicine-University of Freiburg, Freiburg, Germany.

Objectives: The objective of this in vitro study was to assess the accuracy of fully guided implant placement following virtual implant planning based on MRI.

Material And Methods: Sixteen human cadaver hemimandibles with single missing teeth (n = 3), partially edentulous (n = 6) and edentulous situations (n = 7) were imaged using MRI. MRI and optical scans obtained with an intraoral scanner, were imported into an implant planning software.

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Background The tandem of P domains in a weak inward rectifying K+ channel (TWIK)-related acid-sensitive K channel (TASK-1; hK3.1) two-pore-domain potassium channel was recently shown to regulate the atrial action potential duration. In the human heart, TASK-1 channels are specifically expressed in the atria.

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The current study examines changes in daily life experiences following mindfulness-based cognitive therapy (MBCT) in a sample of 38 patients with obsessive-compulsive disorder (OCD) and residual symptoms following cognitive behavioral therapy (CBT). Participants were randomized to either an MBCT group (n = 17), or to a psychoeducational group (OCD-EP; n = 21) as an active control condition. Both groups underwent ecological momentary assessment (EMA) six times a day for a period of six consecutive days pre- and posttreatment.

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Background: Bipolar disorders are complex disorders involving the interaction of multiple factors. Affective temperaments, insomnia, and chronobiological rhythms desynchronization may all contribute to bipolar disorder. Since there is a paucity of research examining this topic we aimed to study how they are interrelated and collectively associated with clinical features of bipolar disorder.

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Background: Mass spectrometry imaging is increasingly used in biological and translational research because it has the ability to determine the spatial distribution of hundreds of analytes in a sample. Being at the interface of proteomics/metabolomics and imaging, the acquired datasets are large and complex and often analyzed with proprietary software or in-house scripts, which hinders reproducibility. Open source software solutions that enable reproducible data analysis often require programming skills and are therefore not accessible to many mass spectrometry imaging (MSI) researchers.

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Flow Cytometry in the Diagnosis and Follow Up of Human Primary Immunodeficiencies.

EJIFCC

November 2019

Centre of Chronic Immunodeficiency, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany.

Primary immunodeficiencies (PID) comprise a group of more than 300 mostly monogenetic disorders of the immune system leading to infection susceptibility and a variety of associated clinical and immunological complications. In a majority of these disorders the absence, disproportions or dysfunction of leucocyte subpopulations or of proteins expressed by these cells are observed. These distinctive features are studied by multicolour flow cytometry and the results are used for diagnosis, follow up, classification and therapy monitoring in patients with PIDs.

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Background: One critical step in the therapy of patients with localized pancreatic cancer is the determination of local resectability. The decision between primary surgery versus upfront local or systemic cancer therapy seems especially to differ between pancreatic cancer centers. In our cohort study, we analyzed the independent judgement of resectability of five experienced high volume pancreatic surgeons in 200 consecutive patients with borderline resectable or locally advanced pancreatic cancer.

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Antiplatelet therapy through inhibition of the adenosine diphosphate (ADP)/P2Y12 pathway is commonly used in the treatment of acute coronary syndrome (ACS). Although efficient in preventing platelet activation and thrombus formation, it increases the risk of bleeding complications. In patients with ACS receiving platelet aggregation inhibitors, that is, P2Y12 blockers (n = 923), we investigated the relationship between plasma and platelet-associated CD40L levels and bleeding events (n = 71).

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Tumor-derived lactic acid inhibits T and natural killer (NK) cell function and, thereby, tumor immunosurveillance. Here, we report that melanoma patients with high expression of glycolysis-related genes show a worse progression free survival upon anti-PD1 treatment. The non-steroidal anti-inflammatory drug (NSAID) diclofenac lowers lactate secretion of tumor cells and improves anti-PD1-induced T cell killing in vitro.

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Neuronal-specific microexon splicing of mRNA is directly regulated by SRRM4/nSR100.

RNA Biol

January 2020

German Cancer Consortium (DKTK) partner site Freiburg, German Cancer Research Center (DKFZ) and Department of Urology, Medical Center-University of Freiburg, Freiburg, Germany.

Article Synopsis
  • Neuronal microexons, particularly the six-nucleotide microexon 34', play a crucial role in neuronal development by influencing the expression of the transcription factor TFIID.
  • Researchers explored how this microexon is specifically spliced in neurons, revealing that two TAF1 isoforms have distinct distributions in the brain, differentiating between actively dividing and mature neurons.
  • The splicing factor SRRM4/nSR100 enhances the inclusion of microexon 34' in mRNA, highlighting its importance in producing neuron-specific TFIID complexes during neuronal differentiation.
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Background: Postoperative pulmonary complications (PPCs) represent the most frequent complications after esophagectomy. The aim of this study was to identify modifiable risk factors for PPCs and 90-days mortality related to PPCs after esophagectomy in esophageal cancer patients.

Methods: This is a single center retrospective cohort study of 335 patients suffering from esophageal cancer who underwent esophagectomy between 1996 and 2014 at a university hospital center.

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