44: Grinding, polishing, and finishing


Grinding, polishing, and finishing

Figure 44.1 Effect of external temperature on internal (pulpal) temperature of teeth.


Figure 44.2 Effect of coolant flow rate on dental cutting rates.


Figure 44.3 Chemomechanically enhanced dental cutting.


Box 44.1 Effects of cutting, grinding, and polishing on surfaces
Surface material is removed.
Subsurface layers are affected.
Microcracks are generated.
There is a nonuniform stress distribution.
An anisotropic surface layer is created.

Table 44.1 Common abrasives

Abrasive Composition Applications
Alumina Aluminum oxide Finishing of metals, resins, and ceramics
Arkansas stone Microcrystalline quartz Fine grinding of enamel and metals
Chalk Mineral form of calcite Polishing of enamel, amalgam, and resins
Corundum Alumina Grinding of metals
Diamond Natural Finishing and polishing of ceramics and resins
Synthetic Cutting, finishing, and polishing of tooth structure, ceramics, metals, and resins
Emery Fine-grain alumina Finishing of metals and resins
Garnet Silicate-based mineral Grinding of metals and resins
Pumice Volcanic material Polishing of enamel, amalgam, and resins
Quartz Silica Finishing of metals
Rouge Iron oxide Polishing noble metals
Sand Silica minerals Air blasting to clean castings
Silicon carbide Synthetic material Cutting of metals, ceramics, and resins
Tin oxide Metal oxide Polishing teeth and metals
Tripoli Sedimentary rock Polishing of metals and resins
Zircon Zirconium silicate Prophylaxis paste
Jan 1, 2015 | Posted by in Dental Materials | Comments Off on 44: Grinding, polishing, and finishing
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