can anyone give me the electronic microscopic photos of structure
between the porcelain-fused-to-metal crown and tooth surface? it
woulbe be best if someone can find differtentiate pictures between
different metals.

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Request for Question Clarification by bobbie7-ga on 19 Sep 2006 09:28 PDT

Hello John6656,

I believe I found the images you require. 

Download the study at the link below and check out figure 1, 2, 3 and 4 on page 7 
http://www.ulacit.ac.cr/revista/rhombus9/R06A16.pdf


"This in vitro study compared the hot pressed porcelain crown with IPS
Empress II and the porcelain-fused-to-metal crown with feldespathic
shoulder and evaluated which material had the best marginal fit and
less microleakage. The 20 superior and inferior premolars were
randomly divided into two groups: Group A (hot pressed porcelain
crown) and Group B (porcelain-fused-to-metal crown). The preparations
were of 1.5mm, then the porcelain crown was created with the stain
technique and the porcelain-fused-to-metal crown with the layering
technique, afterwards they were cemented. Both groups were submitted
to thermocycling and sumerged in a 1% blue methylene solution, then
they were sectioned transversally and microleakage was seen under a
stereomicroscope. Afterwards both groups were taken to the electronic
microscope to take images en vestibular and palatine/lingual surfaces
at 200x and 1000x; the data were colleted in ?m. The results indicated
that the marginal discrepancy in vestibular and palatine/lingual
surfaces in both groups had no significant differences. In the
microleakage results, Group A had less microleakage in vestibular and
both groups had no significant differences in palatine/vestibular."
http://www.ulacit.ac.cr/revista/rhombus9/R06A16.pdf

Would these images work for you?

Thanks,  
Bobbie7

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Request for Question Clarification by bobbie7-ga on 19 Sep 2006 09:36 PDT

John6656,

There are a number of images in the following publication that might
meet your needs.
Structural Investigation of Metal-Ceramic Interface Using Transmission
Electron Microscopy
http://dent.sympo.nagasaki-u.ac.jp/baylor/tanaka/presentation.html

Do any of these images work for you?

Bobbie7

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Request for Question Clarification by bobbie7-ga on 22 Sep 2006 23:04 PDT

john6656-ga,

Did you have a chance to check out the images I located.

Were they on target?

Bobbie7