http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- It's in the teeth. An odd mosaic of dental features recently unearthed in northern Egypt reveals a previously undocumented, highly-specialized primate called Nosmips aenigmaticus that lived in Africa nearly 37 million years ago. http://phys.org/news192736436.html Other Sciences Mon, 10 May 2010 18:54:22 EST news192736436 (AP) -- A team of surgeons has carried out the world's first full-face transplant on a young Spanish farmer unable to breathe or eat on his own since accidentally shooting himself in the face five years ago. http://phys.org/news191229838.html Medicine & Health Fri, 23 Apr 2010 08:24:15 EST news191229838 A new leech species with ferociously large teeth -- recently discovered in noses of children that swam in Peruvian rivers -- is providing insight into the evolutionary relationships among all the leeches that have an affinity for mucus membranes and orifices. Tyrannobdella rex was discovered in the remote Upper Amazon; its regular host remains unknown. http://phys.org/news190468932.html Other Sciences Wed, 14 Apr 2010 17:00:04 EST news190468932 The human mouth is home to an estimated 800 to 1,000 different kinds of bacteria. The warm and moist environment, along with hard tooth surfaces and soft tissues, prove to be optimal factors in boosting germ growth. Many of these bacteria are harmful and can form a film on teeth called "dental plaque," which causes cavities, gingivitis and eventually more severe kinds of gum disease. http://phys.org/news190380679.html Medicine & Health Tue, 13 Apr 2010 12:32:21 EST news190380679 People with dented smiles run a far greater risk of dying of heart disease than those who still have all their pearly whites, a Swedish researcher said Monday. http://phys.org/news190310046.html Medicine & Health Mon, 12 Apr 2010 16:54:24 EST news190310046 It might sound like a mashup of monster movies, but palaeontologists have discovered evidence of how an extinct shark attacked its prey, reconstructing a killing that took place 4 million years ago. http://phys.org/news187964241.html Other Sciences Tue, 16 Mar 2010 13:17:43 EST news187964241 Each cusp of our teeth is regulated by genes which carefully control the development. A similar genetic puzzle also regulates the differentiation of our other organs and of all living organisms. A team of researchers at the Institute of Biotechnology of the University of Helsinki has developed a computer model reproducing population-level variation in complex structures like teeth and organs. The research takes a step towards the growing of correctly shaped teeth and other organs. The results were published last week in Nature. http://phys.org/news187868864.html Biology Mon, 15 Mar 2010 11:00:21 EST news187868864 People who are stressed by daily problems or trouble at work seem to be more likely to grind their teeth at night. Researchers writing in BioMed Central's open access journal Head & Face Medicine studied the causes of 'sleep bruxism', gnashing teeth during the night, finding that it was especially common in those who try to cope with stress by escaping from difficult situations. http://phys.org/news186990768.html Medicine & Health Fri, 05 Mar 2010 06:20:02 EST news186990768 Ancient human teeth are telling secrets that may relate to modern-day health: Some stressful events that occurred early in development are linked to shorter life spans. http://phys.org/news184519813.html Other Sciences Thu, 04 Feb 2010 15:30:32 EST news184519813 Swedish 19-year-olds need to improve their oral hygiene habits. Seven out of eight adolescents have unacceptable oral hygiene, which increases the risk of future dental problems. These are the findings of a new study from the Sahlgrenska Academy at the University of Gothenburg. http://phys.org/news183136268.html Medicine & Health Tue, 19 Jan 2010 17:20:01 EST news183136268 (PhysOrg.com) -- It has long been the common perception that once modern humans appeared more than 50,000 years ago, little has changed in human biology. http://phys.org/news181937361.html Biology Tue, 05 Jan 2010 18:10:04 EST news181937361 (PhysOrg.com) -- The teeth of some apes are formed primarily to handle the most stressful times when food is scarce, according to new research performed at the National Institute of Standards and Technology. The findings imply that if humanity is serious about protecting its close evolutionary cousins, the food apes eat during these tough periods—and where they find it—must be included in conservation efforts. http://phys.org/news180206837.html Biology Wed, 16 Dec 2009 17:28:02 EST news180206837 You can practically track Steve Barkley's stress by the level of activity in his temporomandibular joint, or TMJ, the hinge joint that connects the lower jaw to the temporal bone of the skull and helps one chew, talk and yawn. http://phys.org/news178536962.html Medicine & Health Fri, 27 Nov 2009 19:40:04 EST news178536962 Robots may practice dentistry one day, but there will always be humans telling you to open wide, said a teacher on the cutting edge of tooth care. http://phys.org/news178315688.html Medicine & Health Tue, 24 Nov 2009 22:40:03 EST news178315688 (PhysOrg.com) -- A new study pitting academic expertise against a computer in recreating a 425 million-year old jigsaw puzzle has discovered that there is no substitute for wisdom born out of experience. http://phys.org/news177583145.html Other Sciences Mon, 16 Nov 2009 08:40:22 EST news177583145 With the help of a gum chomping machine and years of careful chemistry, University of Kentucky researchers have developed a chewing gum that can help replace toothpaste and a toothbrush, thus improving the health of soldiers in the field as well as children in poor countries. http://phys.org/news177342174.html Medicine & Health Fri, 13 Nov 2009 14:20:02 EST news177342174 There is a high prevalence of nocturnal teeth grinding, or bruxism, in patients with obstructive sleep apnea (OSA), particularly in Caucasians. New research presented at CHEST 2009, the 75th annual international scientific assembly of the American College of Chest Physicians (ACCP), found that nearly 1 in 4 patients with OSA suffers from nighttime teeth grinding; this seems to be especially more prevalent in men and in Caucasians compared with other ethnic groups. http://phys.org/news176395175.html Medicine & Health Mon, 02 Nov 2009 15:40:03 EST news176395175 It has long been known that acids can erode tooth enamel but a new Swedish study from the Sahlgrenska Academy at the University of Gothenburg, Sweden, shows that strong alkaline substances can damage teeth too - substances with high pH values can destroy parts of the organic content of the tooth, leaving the enamel more vulnerable. http://phys.org/news175867898.html Medicine & Health Tue, 27 Oct 2009 13:50:03 EST news175867898 Joan Ketterer still recalls the button her son Edward got for donating his baby teeth to what was then a ground-breaking study looking at the effect of nuclear fallout on children born in the St. Louis-area in the 1960s. http://phys.org/news175368568.html Medicine & Health Wed, 21 Oct 2009 18:30:55 EST news175368568 In an article published in the open-access, peer-reviewed journal PLoS ONE on October 21, 2009, Dr Thomas Plummer of Queens College at the City University of New York, Dr Richard Potts of the Smithsonian Institution National Museum of Natural History and colleagues report the oldest archeological evidence of early human activities in a grassland environment, dating to 2 million years ago. The article highlights new research and its implications concerning the environments in which human ancestors evolved. http://phys.org/news175330627.html Other Sciences Wed, 21 Oct 2009 08:20:01 EST news175330627 (PhysOrg.com) -- An 85 million-year-old plesiosaur fossil has been found with over 80 shark's teeth, suggesting the animal was the victim of sharks in a feeding frenzy. The find is perhaps the most spectacular example of a shark attack in the fossil record. http://phys.org/news174052939.html Other Sciences Tue, 06 Oct 2009 14:40:01 EST news174052939 It's been a mystery: how can our teeth withstand such an enormous amount of pressure, over many years, when tooth enamel is only about as strong as glass? A new study by Prof. Herzl Chai of Tel Aviv University's School of Mechanical Engineering and his colleagues at the National Institute of Standards and Technology and George Washington University gives the answer. http://phys.org/news169915589.html Technology Wed, 19 Aug 2009 16:00:03 EST news169915589 A group of researchers in Australia and Taiwan has developed a new way to analyze the health of human teeth using lasers. As described in the latest issue of Optics Express,, by measuring how the surface of a tooth responds to laser-generated ultrasound, they can evaluate the mineral content of tooth enamel -- the semi-translucent outer layer of a tooth that protects the underlying dentin. http://phys.org/news169813870.html Physics Tue, 18 Aug 2009 11:50:02 EST news169813870 Dentists want those expensive crowns to stick to the teeth. But it doesn’t always happen because of contamination during the crown’s bonding. http://phys.org/news167324182.html Medicine & Health Mon, 20 Jul 2009 15:57:31 EST news167324182 Researchers have warned people to beware of the damage that acidic beverages have on teeth. Yet, for some, the damage and problems associated with drinking sodas, citric juices or certain tea may have already begun to take effect. The question remains: What can be done to restore teeth already affected? http://phys.org/news167056819.html Medicine & Health Fri, 17 Jul 2009 13:44:06 EST news167056819 Children given an oral syrup containing the naturally occurring sweetener xylitol may be less likely to develop decay in their baby teeth, according to a report in the July issue of Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals. http://phys.org/news166117764.html Medicine & Health Mon, 06 Jul 2009 18:50:01 EST news166117764 The UK spends around £2.5 billion each year on dental materials to replace or strengthen teeth. The Chewing Robot is a new biologically inspired way to test dental materials and it will be shown to the public for the first time at this year's Royal Society Summer Science Exhibition [30 June to 4 July]. http://phys.org/news165564631.html Technology Tue, 30 Jun 2009 07:11:30 EST news165564631 Microscopic analysis of scratches on dinosaur teeth has helped scientists unravel an ancient riddle of what a major group of dinosaurs ate- and exactly how they did it! http://phys.org/news165515308.html Other Sciences Mon, 29 Jun 2009 17:28:50 EST news165515308 In the famed Sharktooth Hill Bone Bed near Bakersfield, Calif., shark teeth as big as a hand and weighing a pound each, intermixed with copious bones from extinct seals and whales, seem to tell of a 15-million-year-old killing ground. http://phys.org/news163682888.html Other Sciences Mon, 08 Jun 2009 12:28:36 EST news163682888 Rushing to salvage fossils from the Panama Canal earthworks, Aldo Rincon, paleontology intern at the Smithsonian Tropical Research Institute, unearthed a set of fossil teeth. Bruce J. MacFadden, curator of vertebrate paleontology at the Florida Museum of Natural History, University of Florida in Gainesville, describes the fossil as Anchitherium clarencei, a three-toed browsing horse, in the May 2009 issue of the Journal of Paleontology. http://phys.org/news163677222.html Other Sciences Mon, 08 Jun 2009 10:54:04 EST news163677222