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Crowded teeth are a sign of going soft

机译:牙齿拥挤是变软的迹象

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Teeagers facing the purgatory of braces to fix their misaligned teeth might be able to blame bread for their predicament. Noreen von Cramon-Taubadel at the University of Kent, UK, measured the shape of 295 human lower jaws from museum specimens. Those that came from agricultural societies were smaller, on average, than those that came from huntergatherer societies - although all carried the same number of teeth. The differences persisted even after she accounted for the effects of climate, geography and random genetic variation {Proceedings of the National Academy of Sciences, DOI: lo.1073/pnas.1113050108). The likeliest explanation is that grain-rich agricultural diets tend to be softer and easier to chew than the wild plant and meat-rich diets of hunter-gatherers - so the jaw does not grow so large, says von Cramon-Taubadel.
机译:面对牙齿矫正器的未成年人,他们可能无法将牙齿错位归咎于面包。英国肯特大学的Noreen von Cramon-Taubadel从博物馆标本中测量了295个人类下颌的形状。来自农业社会的牙齿平均比来自狩猎采集社会的牙齿小,尽管它们都带有相同数量的牙齿。即使在考虑了气候,地理和随机遗传变异的影响之后,差异依然存在(美国国家科学院院刊,DOI:lo.1073 / pnas.1113050108)。 von Cramon-Taubadel说,最可能的解释是,富含谷物的农业饮食比野生植物和富含肉类的狩猎者饮食更容易咀嚼-因此下颚不会长得太大。

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    《New scientist》 |2011年第2840期|p.17|共1页
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  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
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