BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

Bul. Inst. Polit. Iaşi, t. LVI (LX), f. 2, 2010 255
are very similar to the ones of the human bone, for that reason cow bones have
been used for the scientific community in multiple tests of this type.
Fig. 4 – Drilling of bone and thermography.
4. Methodology
For the test we used a 2.22 mm in diameter drill bit turning at a speed of
2,000 rpm attached to a handpiece from the surgical motor. For the set up of the
surgical motor we choose the maximum power to avoid a fall in the turning
speed. The handpiece was attached to the tester that made it move down at a
speed of 1.25 mm/second. The drill was made in a single movement until we
reached a depth of 8 mm. This is not the usual way for implantology, which
uses a discontinuous drilling of one or two seconds. This way we could get a
higher temperature in the drill bit and check the efficiency of thermology in
bone drilling.
The thermographic camera was placed in front of the force generating
machine, as seen in figure 1, which gave us a general view of the cutting area.
Over the thermographic camera was placed a macro lens in order to increase the
resolution of the camera in the area of contact between the drill bit and the bone
sample. This setting allowed us to register the temperature in the drilling zone,
which included the temperature of the drill bit and the superficial temperature of
the bone in the critical area, beside the tool. We made several tests where we