20 research outputs found
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3D Printing of Piezoelectric Barium Titanate-Hydroxyapatite Scaffolds with Interconnected Porosity for Bone Tissue Engineering
The prevalence of large bone defects is still a major problem in surgical clinics. It is, thus, not a surprise that bone-related research, especially in the field of bone tissue engineering, is a major issue in medical research. Researchers worldwide are searching for the missing link in engineering bone graft materials that mimic bones, and foster osteogenesis and bone remodeling. One approach is the combination of additive manufacturing technology with smart and additionally electrically active biomaterials. In this study, we performed a three-dimensional (3D) printing process to fabricate piezoelectric, porous barium titanate (BaTiO3) and hydroxyapatite (HA) composite scaffolds. The printed scaffolds indicate good cytocompatibility and cell attachment as well as bone mimicking piezoelectric properties with a piezoelectric constant of 3 pC/N. This work represents a promising first approach to creating an implant material with improved bone regenerating potential, in combination with an interconnected porous network and a microporosity, known to enhance bone growth and vascularization
The Role of Photon Energy in Free Charge Generation in Bulk Heterojunction Solar Cells
Distribution of Endothelin Receptor Subtypes in the Rat Kidney Renal and Haemodynamic Effects of the Mixed (A/B) Endothelin Receptor Antagonist Bosentan
Peer Reviewe
Fatal cytomegalovirus pneumonia after preemptive antiviral therapy in a renal transplant recipient
Effects of acute hypermagnesaemia on intracellular calcium concentration and adrenergic activity
Computational analysis of blood volume curves and risk of intradialytic morbid events in hemodialysis
Charge carrier extraction study of hole mobility and dynamics in poly(3-hexylthiophene) films subjected to photothermal aging
Kenntnisse von deutschsprachigen Urologen zur Häufigkeit der Assoziation des Peniskarzinoms mit dem Humanen Papillomavirus – Survey-Ergebnisse der European PROspective Penile Cancer Study (E-PROPS)
BACKGROUND A recent meta-analysis showed that penile cancer (PeC) is associated with the human papilloma virus (HPV) in 50 % of patients in Europe. It is unknown whether urologists are aware of the impact of viral carcinogenesis.
METHODS A (German-language) survey comprising 14 items was created and sent to urologists of 45 clinical centres in Germany (n = 34), Austria (n = 8), Switzerland (n = 2) and Italy/South Tyrol (n = 1) once in Q3/2018. According to a predefined quality standard, a total of 557 surveys were eligible for final data analysis (response rate: 85.7 %). Among other questions, urologists were asked to state the frequency of HPV-associated PeC in Europe. 4 potential answers were provided: (A)-" 50 - 75 %", (D)-"level of association unknown". For the final calculation, a tolerance of ± 50 % was considered acceptable, so B and C were deemed correct answers. Based on a bootstrap-adjusted multivariate logistic regression model, criteria independently predicting a correct answer were identified.
RESULTS Categories A-D were selected in 19.2 % (n = 107), 48.8 % (n = 272), 12.9 % (n = 72) and 19 % (n = 106), respectively, representing a rate of 61.8 % of urologists (n = 344) reaching the endpoint (B + C). Autonomous performance of chemotherapy for PeC by urologists within the given centre (OR 1.55, p[Bootstrap] = 0.036) and the centre's number of urological beds (OR 1.02, p[Bootstrap] = 0.025) were the only parameters showing a significant independent impact on the endpoint. In contrast, the status of a university centre (p = 0.143), a leading position of the responding urologist (p = 0.375) and the number of PeC patients treated per year and centre (p = 0.571) did not significantly predict a correct answer.
CONCLUSIONS Our results demonstrate insufficient knowledge on the association of PeC and HPV among German-speaking urologists