Townsend G C, Brown T
Am J Phys Anthropol. 1983 Jan;60(1):69-74. doi: 10.1002/ajpa.1330600111.
Percentage frequencies for molar size sequence of first and second molars were calculated in a group of contemporary Australian Aboriginals using mesiodistal and buccolingual dimensions, as well as crown areas. Comparisons were made between sexes, arches, and dimensions within the Aboriginal group and also between Aboriginal data and those published for other populations. The frequencies of the M2 greater than M1 molar size sequence in the Aboriginals fell within the range of frequencies reported for other contemporary populations. Differences in the frequencies of the M2 greater than M1 sequence between the sexes and between arches, together with the relatively high frequency of asymmetry in molar size sequence within Aboriginals, supported the notion that local environmental conditions acting during odontogenesis, together with differential responses to other environmental influences, play an important role in determining observed patterns of molar tooth size.
在一组当代澳大利亚原住民中，利用近远中径、颊舌径以及牙冠面积，计算了第一和第二磨牙的牙大小序列的百分比频率。对该原住民群体中的性别、牙弓和尺寸之间进行了比较，同时也将原住民的数据与其他人群公布的数据进行了比较。原住民中第二磨牙大于第一磨牙的牙大小序列频率落在其他当代人群报告的频率范围内。性别和牙弓之间第二磨牙大于第一磨牙序列频率的差异，以及原住民中牙大小序列不对称的相对高频率，支持了这样一种观点，即在牙发生过程中起作用的局部环境条件，以及对其他环境影响的不同反应，在决定观察到的磨牙大小模式中起着重要作用。
