The best efforts of dentists don’t always mean people will look after their teeth, British researchers have found.
A study by a team at the University of Newcastle upon Tyne discovered that only up to one-third of gum disease patients, who received advice on how long to brush their teeth, followed it to the letter. Yet the same people perceived their brushing habits to be better than they were – a finding which has major implications for dentists wishing to change their patients’ behaviour.
Gum disease can eventually lead to multiple tooth loss, but in many cases damage can be stabilised or reversed if treatment is combined with a good home toothcare regime. For the study, patients were given advice on a regime – which in particular said they should brush their teeth twice a day for two minutes each time. Each of the 17 study participants used an electronic ‘data logger’ powered toothbrush that recorded brushing time. The brush had a light on the handle that flashed when two minutes had elapsed. They were also asked to fill in diaries detailing their brushing habits. The experiment recorded brushing times for two periods of four weeks.
Claire Jordan | alfa
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DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
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MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
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