Dr Nicola Innes, who led the Scottish research team at Dundee Dental Hospital and School, explained, “There has been a lot of debate in the UK over the best method to tackle tooth decay in children’s molars. Preformed metal crowns are not widely used in Scotland as they’re not viewed as a realistic option by dentists. We found, however, that almost all the patients, parents and dentists in our study preferred the Hall Technique crowns and also children benefited from them.”
Traditionally, dentists “freeze” a decayed tooth with an injection in the child’s gum, and then drill away the decay, and fill the cavity with a metal filling. This method can be uncomfortable for the child. The Hall Technique, however, is simple. The decay is sealed into the tooth by the crown and, as sugars in the diet are unable to reach it, the decay slows or even stops. 132 children in Tayside, Scotland, had one decayed tooth filled traditionally, and another decayed tooth managed with the Hall Technique. 77% of the children, 83% of carers and 81% of dentists preferred the Hall Technique to traditional “drill and fill” methods. Dentists reported that 89% of the children showed no significant signs of discomfort with the Hall Technique, compared with 78% for the traditional fillings.
Around one in two children in Scotland has visible tooth decay at the age of 5. Most children have to accept toothache as part of normal everyday life. Two years after receiving the Hall Technique crown, however, the children’s dental health significantly improved, with less pain, abscesses and failed fillings than with the traditional “drill and fill” methods.
Dr Innes concluded “Children, parents and dentists prefer the Hall Technique. It allows dentists to achieve a filling with a high quality seal, which means we can safely leave decay in baby teeth, and not be forced to drill it away. Hall crowns will not suit every child, or every decayed tooth in a child’s mouth, but dentists may find it a useful treatment option for managing decay in children’s back teeth.”
Charlotte Webber | alfa
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Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
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Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
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