Brief communication: Contributions of enamel-dentine junction shape and enamel deposition to primate molar crown complexity.
Brief communication: Contributions of enamel-dentine junction shape and enamel deposition to primate molar crown complexity.
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简短交流：牙釉质-牙本质交界形状和牙釉质沉积对灵长类动物磨牙牙冠复杂性的贡献。
DOI：
10.1002/ajpa.21248
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发表时间：
2010
影响因子：
2.8
通讯作者：
J. Hublin
中科院分区：
文献类型：
--
作者：
M. Skinner;A. Evans;Tanya M. Smith;J. Jernvall;J. Jernvall;P. Tafforeau;Kornelius Kupczik;A. Olejniczak;A. Rosas;J. Radovčić;J. Thackeray;M. Toussaint;J. Hublin
灵长类动物的臼齿冠形态各不相同，有的分类群较为简单，有的分类群较为复杂，这种变异具有功能和分类意义。除了主要的尖，冠表面的复杂性来自于冠、尖和小圆齿的存在。在发育过程中，这种复杂性是由珐琅质帽沉积在基膜上造成的（在完全形成的牙齿中，基膜的形态被保存为珐琅质-牙本质交界处，或EDJ）。然而，釉质盖和EDJ对磨牙冠复杂性的相对贡献却没有得到很好的表征。在这项研究中，我们通过应用微型计算机断层扫描和牙齿地形分析，研究了灵长类动物（包括古人类化石）下磨牙的EDJ和牙釉质表面的复杂性。首先通过映射，然后求和离散表面取向斑块的总数来量化EDJ和外釉质表面（OES）的表面复杂性。我们通过评估类群内和个体牙齿内EDJ和OES斑块数的相关性，研究了EDJ和牙釉质帽对冠复杂性的相对贡献。我们确定了三种EDJ/OES复杂性模式，这表明发育早期的冠模式和随后的牙釉质冠沉积有助于灵长类动物的整体冠复杂性。
Molar crown morphology varies among primates from relatively simple in some taxa to more complex in others, with such variability having both functional and taxonomic significance. In addition to the primary cusps, crown surface complexity derives from the presence of crests, cuspules, and crenulations. Developmentally, this complexity results from the deposition of an enamel cap over a basement membrane (the morphology of which is preserved as the enamel-dentine junction, or EDJ, in fully formed teeth). However, the relative contribution of the enamel cap and the EDJ to molar crown complexity is poorly characterized. In this study we examine the complexity of the EDJ and enamel surface of a broad sample of primate (including fossil hominin) lower molars through the application of micro-computed tomography and dental topographic analysis. Surface complexity of the EDJ and outer enamel surface (OES) is quantified by first mapping, and then summing, the total number of discrete surface orientation patches. We investigate the relative contribution of the EDJ and enamel cap to crown complexity by assessing the correlation in patch counts between the EDJ and OES within taxa and within individual teeth. We identify three patterns of EDJ/OES complexity which demonstrate that both crown patterning early in development and the subsequent deposition of the enamel cap contribute to overall crown complexity in primates.
DOI：
10.1387/ijdb.7848830
发表时间：
1994-09
期刊：
The International journal of developmental biology
影响因子：
--
作者：
J. Jernvall;P. Kettunen;I. Karavanova;L. Martin;Irma Thesleff
通讯作者：
J. Jernvall;P. Kettunen;I. Karavanova;L. Martin;Irma Thesleff