Konjević Dean, Keros Tomislav, Brkić Hrvoje, Slavica Alen, Janicki Zdravko, Margaletić Josip
Veterinary Faculty, University of Zagreb, Zagreb, Croatia.
Coll Antropol. 2003 Jun;27(1):373-80.
The structure of teeth in all living beings is genetically predetermined, although it can change under external physiological and pathological factors. The author's hypothesis was to indicate evolutional shifts resulting from genetic, functional and other differences. A comparative study about certain characteristics of incisors in humans and myomorpha, the fat dormouse (Glis glis) being their representative as well, comprised measurements of enamel and dentin thickness in individual incisor segments, evaluation of external enamel index, and also assessment of histological structure of enamel and dentin. The study results involving dormice showed the enamel to be thicker in lower than in the upper teeth, quite contrary to enamel thickness in humans. In the upper incisors in dormice the enamel is the thickest in the medial layer of the crown, and in the cervical portion of the crown in the lower incisors. The thickness of dentin in dormice is greater in the oral than in the vestibular side. These findings significantly differ from those reported in reference literature, but they are based on the function of teeth in dormice. Histological characteristics of hard dental tissues in dormice are similar to those in humans, with exception of uniserial structure of enamel and appearance of dentinoenamel junction.
所有生物牙齿的结构在基因上是预先确定的，尽管它会在外部生理和病理因素的影响下发生变化。作者的假设是指出由基因、功能和其他差异导致的进化转变。一项关于人类和鼠形亚目动物（以肥睡鼠（Glis glis）为代表）门牙某些特征的比较研究，包括测量单个门牙段的釉质和牙本质厚度、评估外部釉质指数，以及评估釉质和牙本质的组织结构。涉及睡鼠的研究结果表明，下牙的釉质比上牙厚，这与人类的釉质厚度情况完全相反。在睡鼠的上门牙中，釉质在牙冠的中间层最厚，而在下心牙的牙冠颈部最厚。睡鼠牙本质的厚度在口腔侧比前庭侧更大。这些发现与参考文献中报道的结果有显著差异，但它们是基于睡鼠牙齿的功能得出的。睡鼠硬牙组织的组织学特征与人类相似，但釉质的单列结构和牙釉质交界处的外观除外。
