This one should be used by Pedodontics all over the world i think, this image really makes me remember my posting in Pedo Dept where i came across a really naughty child who was not at all co-operative and the Doctors and his parents in the clinic had a hard time getting the boy to [...]
Here i go again writing about Dental sites which i think are worth visiting, this site here is a beautiful piece of art along with education i liked this site particulary because it has the subject which is showed in an animated way which makes everyone take intrest in learning.
It has a good number of [...]
CONDENSATION SILICONES
It was the first type of silicone impression material.
Also known as conventional silicones.
Setting occurs in room temp , so called as RTV silicones.
Composition:
Base paste
Polydimethyl siloxane (hydroxy terminated)
Colloidal silica or micro sized metal oxide filler
putty viscosity – 60-70%
medium viscosity – 35-75 %
low viscosity – 5-15%
color pigments
accelerator paste
alkyl silicate (ortho ethyl silicate)
stannous octate
inert [...]
POLYSULFIDE ELASTOMERIC IMPRESSION MATERIAL:
First elastomeric impression material to be introduced, also known as mercaptan / thymol, it is a type of Rubber based impression material
Supplied as
Base paste (white)
Accelerator (brown/grey)
Available in 3 viscosities:
Light bodied
Medium bodied
Heavy bodied
Composition:
Base paste:
Liquid polysulfide polymer 80-85%
Inert fillers (titanium oxide, zinc sulfate, silica) 16-18%
Reactor Paste:
Lead dioxide 60-69%
Dibutyl [...]
Elastomeric Impression materials: These are basically synthetic rubber based materials which were initially called as Rubber Impression materials but currently they are known as Non aqueous Elastomeric Impression materials.
Classification of Elastomeric Impression materials:
Till now the elastomeric impression materials are divided into 3 types based on the material used
1. Polyether
2. Polysulfide
3. Silicone
Addition
Condensation
POLYETHER IMPRESION [...]