Radiodensity and hardness of enamel and dentin of human and bovine teeth, varying bovine teeth age
Radiodensity and hardness of enamel and dentin of human and bovine teeth, varying bovine teeth age
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DOI：
10.1016/j.archoralbio.2008.06.012
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发表时间：
2008-11-01
影响因子：
3
通讯作者：
Correr-Sobrinho, L.
中科院分区：
文献类型：
--
作者：
Fonseca, R. B.;Haiter-Neto, F.;Correr-Sobrinho, L.
研究已经评估了动物物种的牙齿硬组织特性，以便用作人类牙齿的替代品。本研究的目的是评估人和牛牙釉质和牙本质的放射性密度和硬度，不同的牛牙齿年龄。从20（B20）、30（B30）、38（B38）和48（B48）月龄的动物和20至30岁的人第三磨牙（H）获得5个标本（1 mm厚）。用磷光体板数字系统（迪戈拉Optime）拍摄射线照相图像。获得放射密度并记录努普硬度（KHN）（100 g，15 s-每个样本5个压痕）。根据Tukey's HSD检验和Dunnet's双侧t检验，通过单因素ANOVA分析数据。釉质组的放射密度相似，但牛牙本质的放射密度高于人类，无论年龄组。B20-B30和B38-B48-H组间牙釉质-KHN有差异，而各组间牙本质-KHN相似。牙釉质的放射密度始终高于牙本质，并且KHN也较高（p = 0.001）。使用牛牙釉质或牙本质时应考虑牙齿年龄，但一般来说，建议选择年龄较大的牛牙齿，因为更有可能找到与人类牙齿更大的相似性。(C)2008爱思唯尔有限公司保留所有权利。
Studies have evaluated dental hard tissues characteristics from animal species in order to be used as a substitute for human teeth. The aim of this study was to evaluate the radiodensity and hardness of human and bovine enamel and dentin, varying bovine teeth age. Five specimens (1 mm thick) were obtained from animals aged 20 (B20), 30 (B30), 38 (B38) and 48 (B48) months and from 20 to 30-years-old human third molars (H). The radiographic images were taken with a phosphor plaque digital system (Digora Optime). The radiodensity was obtained and Knoop hardness (KHN) was recorded (100 g for 15 s-5 indentations per specimen). Data were analyzed by one-way ANOVA following Tukey's HSD test and Dunnet's two-sided t-test. Radiodensity was similar within enamel groups, but bovine dentin presented higher radiodensity than human one regardless of age groups. Enamel-KHN showed differences between B20-B30 and B38-B48-H, and dentin-KHN was similar within all groups. Enamel was always more radiodense than dentin and also presented higher KHN (p = 0.001). The use of bovine enamel or dentin should take into consideration the teeth age, but as a general rule it should be recommended to select older bovine teeth due to better chances to find greater similarity with human teeth. (C) 2008 Elsevier Ltd. All rights reserved.