Fig 1.
Diagram of steam chamber with sample and water steam.
(a) top view (b) side view. Note that the specimen was machined from a human 3rd molar sliced in the buccal direction and with the in-plane tubules perpendicular to heat flow direction.
Fig 2.
Images acquired 1, 2, 10, 20, 100 and 200 second from the beginning of testing of a tooth section surface acquired to determine spatial and temporal surface temperature variations.
Each image in two directions corresponds to an area of 32mm (x) by 24mm (y).
Fig 3.
Time dependent variations of in at specific locations from tests on the sliced tooth surface, where the positions of A, B and C correspond to three positions in the water region and (D, E) are the dentine and enamel material region.
Fig 4.
Temperature distributions along four typical buccal lines of the section of a human molar at (a) y1 = 16.5 mm, (b) y2 = 13.5mm, (c) y3 = 11.5 mm and (d) y4 = 8.5 mm at each time steps from 0s till 270s.
Fig 5.
TEM image of human enamel, dentin-enamel junction and dentine.
The heat flow is from enamel(E) to dentine(D), (b) is the DEJ image after demineralization. (a):enamel, (b):dentin-enamel junction, (c):dentine
Fig 6.
SEM image of human dentine microstructures showing solid dentine material and tubules.
The heat flow is perpendicular to the DEJ interface.