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H.F.Atikinson等人利用金相显微镜改装的显微硬度计,测量人的离体牙齿的硬度,对成熟乳牙与不成熟乳牙、矩轻恒牙与老年恒牙硬度作了比较,其结果是成熟乳牙硬度>不成熟乳牙>老年恒牙>年轻恒牙。其均值为370±kg/mm~2。E.Lazzari
HFAtikinson et al. Microscopic hardness tester modified by a microscope was used to measure the hardness of isolated human teeth. The results were compared with those of mature permanent teeth and immature deciduous teeth, moment of light permanent teeth and senile permanent teeth. The result was mature deciduous teeth Hardness> Immature deciduous teeth> Elderly permanent teeth> Young permanent teeth. The mean value is 370 ± kg / mm ~ 2. E.Lazzari