Biomedical Engineering Reference
In-Depth Information
80
80
70
70
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60
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50
40
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30
20
20
10
10
0
1
2
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0
Cutting time (min)
1
2
3
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7
Uncoated bur
Sintered diamond bur
Cutting time (min)
Uncoated bur
Sintered diamond bur
HFCVD diamond bur
FIGURE 15.32
Flank wear of burs machining acrylic tooth material.
FIGURE 15.33
Flank wear of burs machining human tooth
material.
The teeth were machined using the apparatus shown in
Figures 15.19-15.21
. The life of the burs in the
machining sense was measured by comparing the amount of flank wear exhibited by each type of dental
bur. The flank wear was measured at time intervals of 2, 3, 4, 5, 6, and 7 min machining duration.
Figures
15.31-15.33
show the flank wear measurements for each bur machining different dental materials.
Again, the dental burs were examined using optical and SEM techniques and were found to
observe similar trends as burs associated with drilling experiments close.
15.5
CONCLUSIONS
The teeth reside in a harsh environment and get worn and damaged through prolonged use. In order
to repair damage, add fillings, and implants, a wide range of dental burs are employed by dentists
and dental technicians and these are described briefly. HFCVD process for diamond deposition onto
the burs has been described. The effects of process parameters on the properties of diamond films
and performance of diamond coated and untreated dental burs, such as wear and lifetime, have been
investigated. It has been demonstrated that HFCVD coated burs gave superior performance and
reduced wear compared to uncoated and conventional burs.
References
[1] N.M. Jedynakiewicz, A Practical Guide to Technology in Dentistry, Wolfe Publishing, London, 1992.
[2] R. Simonsen, Dentistry in the 21st Century: A Global Perspective, Quintessence Publishing Co., Hanover
Park, IL, 1989.
