Radiodensity and hardness of enamel and dentin of human and bovine teeth, varying bovine teeth age.
作者： R.B. Fonseca , F. Haiter-Neto , H.L. Carlo , C.J. Soares , M.A.C. Sinhoreti
DOI: 10.1016/J.ARCHORALBIO.2008.06.012
关键词: Molar 、 Animal species 、 Dentin 、 Orthodontics 、 Medicine 、 Dentistry 、 Knoop hardness test 、 Bovine enamel 、 Radiodensity 、 Enamel paint 、 Age groups
摘要: Abstract 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 evaluate the radiodensity and hardness bovine enamel dentin, varying teeth age. Five specimens (1 mm thick) were obtained animals aged 20 (B20), 30 (B30), 38 (B38) 48 (B48) months 30-years-old third molars (H). radiographic images taken with phosphor plaque digital system (Digora Optime). Knoop (KHN) recorded (100 g 15 s—5 indentations per specimen). Data analyzed by one-way ANOVA following Tukey's HSD test Dunnet's two-sided t -test. Radiodensity similar within groups, but dentin presented higher than one regardless age groups. Enamel-KHN showed differences between B20–B30 B38–B48–H, dentin-KHN all Enamel always more radiodense also KHN ( p = 0.001). use or should take into consideration age, general rule it recommended select older due better chances find greater similarity
elsevier.com
sci-hub.se 参考文章(44)
Tagami J, Hosoda H, Burrow Mf, Nakajima M, Effect of aging and caries on dentin permeability. Proceedings of the Finnish Dental Society. Suomen Hammaslaakariseuran toimituksia. pp. 149- ,(1992)
W Geurtsen, M Schuckar, J A Lisson, R Schilke, O Bauss, Bovine dentin as a substitute for human dentin in shear bond strength measurements. American Journal of Dentistry. ,vol. 12, pp. 92- 96 ,(1999)
Pashley Dh, Dentin: a dynamic substrate--a review. Scanning microscopy. ,vol. 3, pp. 161- 176 ,(1989)
L Bartosiewicz, Variability of tooth eruption in cattle. Acta Veterinaria Hungarica. ,vol. 37, pp. 303- 317 ,(1989)
Ivar A. Mjör, Human coronal dentine: structure and reactions. Oral Surgery, Oral Medicine, Oral Pathology. ,vol. 33, pp. 810- 823 ,(1972) , 10.1016/0030-4220(72)90451-3
David Pashley, Atsuko Okabe, Phillip Parham, The relationship between dentin microhardness and tubule density Dental Traumatology. ,vol. 1, pp. 176- 179 ,(1985) , 10.1111/J.1600-9657.1985.TB00653.X
A.B. Tveit, I. Espelid, Radiographic diagnosis of caries and marginal defects in connection with radiopaque composite fillings Dental Materials. ,vol. 2, pp. 159- 162 ,(1986) , 10.1016/S0109-5641(86)80027-6
J.H Kinney, M Balooch, G.W Marshall, S.J Marshall, A micromechanics model of the elastic properties of human dentine Archives of Oral Biology. ,vol. 44, pp. 813- 822 ,(1999) , 10.1016/S0003-9969(99)00080-1
Karin Forssell-Ahlberg, Martin Brannström, Lennart Edwall, The diameter and number of dentinal tubules in rat, cat, dog and monkey: A comparative scanning electron microscopic study Acta Odontologica Scandinavica. ,vol. 33, pp. 243- 250 ,(1975) , 10.3109/00016357509004629
R Nalla, Effect of orientation on the in vitro fracture toughness of dentin: the role of toughening mechanisms. Biomaterials. ,vol. 24, pp. 3955- 3968 ,(2003) , 10.1016/S0142-9612(03)00278-3