A retrospective study and two case studies provide new information regarding the safety of a popular dental product.
Only one in ten diagnosed with squamous cell carcinoma of the oral cavity (oral cancer) is younger than 45 years. Many young adults lack the traditional risk factors for oral cancer, namely, long term tobacco and/or alcohol use. As a result, investigation of other factors which may contribute to the development of cancer in these patients is difficult because of the relative rarity of the cases and the wide array of potential carcinogens. Past research has revealed that heavy alcohol and tobacco use was prevalent in some young oral cancer patients, but not at a higher rate than in a control population without cancer.
This has led clinical epidemiologists to wonder what, if any, potentially avoidable environmental exposures may predispose some young patients to develop oral cancer. One answer may be from an otolaryngology—head and neck cancer department at a major academic medical center. Two young patients were diagnosed with oral cancer and both reported the use of tooth whiteners in the years before their diagnosis. Physician specialists and researchers joined to create a clinical history of these two patients and performed a retrospective survey of oral cancer patients to determine the prevalence of tooth whitener use in the entire population and in patients less than 45 years old.
Inselspital: Fewer CT scans needed after cerebral bleeding
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Building blocks for new medications: the University of Graz is seeking a technology partner
19.03.2019 | Karl-Franzens-Universität Graz
DESY and MPSD scientists create high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might find intriguing applications in petahertz electronics and for spectroscopic studies of novel quantum materials.
The nonlinear process of high-order harmonic generation (HHG) in gases is one of the cornerstones of attosecond science (an attosecond is a billionth of a...
Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.
The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...
Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.
Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
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22.03.2019 | Life Sciences
22.03.2019 | Information Technology