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Q: dental material science ( No Answer,   0 Comments )
Subject: dental material science
Category: Science > Chemistry
Asked by: john6656-ga
List Price: $100.00
Posted: 18 Sep 2006 03:54 PDT
Expires: 18 Oct 2006 03:54 PDT
Question ID: 766255
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.

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

"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."

Would these images work for you?


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

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

Do any of these images work for you?


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

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

Were they on target?

There is no answer at this time.

There are no comments at this time.

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