Free website about actual knowledge of dentistry. Everything you want to know about : tooth, brace, pain, decay, implant, prosthesis.
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operative dentistry

To heal a toothdecay it is necessary to remove all attacked dental tissues .
This action is performed with rotative (electromecanic or pneumatic) instruments with carbide burs or diamond burs.
These very fitted instruments allow sometimes to heal toothdecay without anaesthesia and overall without pain.
The dental surgeon's know-how lies in his sense of solid geometry to have both toughness for healed tooth and future filling against considerable mastication forces.
Geometry is explained in further illustrations.
Fillings are made of :

--hardening chemical reaction materials (setting) :
-silver amalgam.

--casted materials :

-metallic alloys.
-photopolymerised resins.
in that case an impression must be done and the casted filling is seated and sealed in tooth cavity during another appointment.


Silver amalgam is used since more than a century.
During such a period there is no knowledge about a specific disease for amalgam carriers.
The released mercury dose by an old silver amalgam filling is quite infinitesimal. The released mercury dose by removing an old silver amalgam is much more important.
To replace silver amalgam we have composite resins.
These resins are not so resistant, and there is a dental fracture hazard and also wear.
These resins are not salivaproof and there is a risk of resumption of the toothdecay. Chemical monomer is toxic for dental pulp.
These are many faults that amalgam ignores.

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