Radiodensity and hardness of enamel and dentin of human and bovine teeth, varying bovine teeth age

被引：82

作者：

Fonseca, R. B. ^{[1
,2
]}

Haiter-Neto, F. ^{[4
]}

Carlo, H. L. ^{[2
]}

Soares, C. J. ^{[3
]}

Sinhoreti, M. A. C. ^{[2
]}

Puppin-Rontani, R. M. ^{[2
]}

Correr-Sobrinho, L. ^{[2
]}

机构：

[1] Univ Estadual Londrina, Dept Restorat Dent, Hlth Sci Ctr, BR-86020120 Londrina, PR, Brazil

[2] Univ Estadual Campinas, Piracicaba Dent Sch, Dent Mat Area, Dept Operat Dent, BR-13414903 Piracicaba, SP, Brazil

[3] Univ Fed Uberlandia, Sch Dent, Dept Operat Dent, BR-38400902 Uberlandia, MG, Brazil

[4] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Oral Radiol, BR-13414903 Piracicaba, SP, Brazil

来源：

ARCHIVES OF ORAL BIOLOGY | 2008年 / 53卷 / 11期

关键词：

Radiodensity; Knoop hardness; Enamel; Dentin; Bovine; Human;

D O I：

10.1016/j.archoralbio.2008.06.012

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

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.

引用

页码：1023 / 1029

页数：7

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