Sažetak sa skupa
Number of the Dentinal Tubules as a Function of Cavity Dept
Zoran Azinović
I. Azinović
O.M. Krznarić
Davor Brajdić
Sažetak
The aim of this study was to determine if there is any defference between the number of exposed dentinal tubules on the cross section of the coronal dentine. By scanning electron microscopy comparative observation was carried out on 60 specimens of human coronal dentine, divided into 3 groups, in relation to the distance from the enamel-dentine junction and the pulp. Coronal dentine in the region of the central fissure was observed on three levels:
1. Cross section of the coronal dentine, 1 mm from the enamel-dentine junction.
2. Cross section of the coronal dentine, half-distance between the enamel-dentine junction and the pulp.
3. Cross section of the coronal dentine, 1 mm from the roof of the pulp chamber.
Openings of the exposed dentinal tubules were counted in a square size 50 x 50 µm of the dentinal surface. The number was divided by 2500 to obtain the number of the openings of the dentinal tubules in the square micrometer (N/µm2). This number was multiplied by 106 to obtain the number of the openings of the dentinal tubules in the square millimeter (N/mm2).
The mean number of the openings of the dentinal tubules on the first level was 9600/mm2, on the second level 27100/mm2 and on the third level 58300/mm2. Using the one-way analysis of variance was found ratio MStreatment/MSerror 305.22, that was greater than F 0.99 (2.57) 4.98.
The results showed that there is significant statistical difference in the number of exposed dentinal tubules between all three groups of specimens.
Ključne riječi
Hrčak ID:
3051
URI
Datum izdavanja:
15.9.2003.
Posjeta: 1.459 *