Dissertation Research: Secular Change of Japanese Occlusion: The Frequency of the Overbite and its Association with Food Preparation Techniques and Eating Habits

论文研究：日本咬合的长期变化：覆牙合的频率及其与食物准备技术和饮食习惯的关系

• 批准号: 9618687
• 负责人: C. Loring Brace
• 金额: $ 1.2万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9618687&HistoricalAwards=false
• 关键词: Dissertation; Research; Secular; Change; Japanese

Until just over 200 years ago, the normal human bite was edge-to-edge. That is, when the molars were clenched together, the cutting edges of the upper and lower incisors met each other rather than overlapping as is now considered normal. The change took place in Europe following the adoption of the dinner fork and the changes in eating habits it indicated late in the 18th century. Because of the hiatus in Old World contacts caused by the American Revolution, that change did not begin to take place until the third decade of the 19th century in America. A similar change should have occurred in Asia following the change in food preparation methods that allowed chopsticks, kwai-zi in China and hashi in Japan, to be used as everyday eating utensils. Preliminary work in China indicates that the modern overbite occurred in upper class Chinese in the Song Dynasty. Song cultural influences had a profound effect on life in Japan, and the purpose of this project is to test whether the adoption of Chinese food preparation and eating habits exemplified by the use of chopsticks was accompanied by a change from the edge-to-edge bite of the first Japanese farmers and their descendants in Yamato Japan which immediately preceded the first major influences from China. These investigations will help clarify the relationships between diet, eating behavior, food preparation technology and normal occlusion of the dentition.

直到200多年前，正常的人类咬合是边缘对边缘的。 也就是说，当臼齿被咬在一起时，上下门牙的切割边缘彼此相遇，而不是像现在认为的那样重叠。 这种变化发生在欧洲，是在世纪晚些时候餐叉的采用和饮食习惯的改变之后。 由于美国独立战争导致与旧世界的接触中断，这种变化直到世纪的第三个十年才开始开始。 类似的变化应该发生在亚洲，随着食物制备方法的改变，筷子，中国的筷子和日本的筷子，被用作日常餐具。 中国的初步研究表明，现代覆牙合发生在宋代的上层社会。 宋代文化的影响对日本人的生活产生了深远的影响，本项目的目的是测试中国的食物准备和饮食习惯的采用，例如使用筷子，是否伴随着第一批日本农民及其在大和日本的后代的边缘到边缘的变化，这直接先于中国的第一次重大影响。 这些研究将有助于阐明饮食、进食行为、食物准备技术与牙列正常咬合之间的关系。