Smith P, Wax Y, Adler F, Silberman U, Heinic G
Am J Phys Anthropol. 1986 Jul;70(3):339-48. doi: 10.1002/ajpa.1330700309.
Mandibles of 126 sexed skeletal specimens, from Near Eastern sites dating over the past 12,000 years were radiographed. From the radiographs obtained, digitised tracings were made of crown length (mesiodistal), root height and width, and corpus height mesial to the premolars and first and second molars. The data obtained were analysed using rank transformation procedures. The significance of unidirectional trends in relation to periods sampled was examined graphically and analytically through linear regression analysis of the ranks on the chronological scale, and Spearman's rank correlation was used to compare relationships between different parameters of individual teeth in different periods. Significant reduction was found in crown length between 12,000 B.P. and 6,000 B.P., but no further reduction was found between 6,000 B.P. and 1,000 B.P. Little change was observed in root size, but corpus height showed significant reduction over the past 6,000 years. The differences observed in the timing and extent of reduction in crown, root, and corpus height are associated with a low intrapopulation correlation between them.
对来自近东地区、年代跨度超过12000年的126具已确定性别的骨骼标本的下颌骨进行了X光摄影。从获得的X光片中，对牙冠长度（近远中向）、牙根高度和宽度，以及前磨牙、第一和第二磨牙近中侧的牙槽骨高度进行了数字化描图。使用秩转换程序对获得的数据进行分析。通过在时间尺度上对秩进行线性回归分析，以图形和分析方式检验了与采样时期相关的单向趋势的显著性，并使用斯皮尔曼秩相关来比较不同时期单个牙齿不同参数之间的关系。发现在公元前12000年至公元前6000年之间牙冠长度显著缩短，但在公元前6000年至公元前1000年之间未发现进一步缩短。牙根大小变化不大，但牙槽骨高度在过去6000年中显著降低。观察到的牙冠、牙根和牙槽骨高度缩短的时间和程度差异与它们之间较低的群体内相关性有关。
