Monday, April 9, 2007
Ask and answer for Spring Lecture 2
Click on the comment link below to post a question regarding the content from Dr Duperon's first lecture on Trauma in children. Respond to any of the concepts that may not have been clear to your classmates. Your student number and last name must accompany each comment. Extra credit may be given for thoughtful responses to classmate questions.
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4 comments:
What exactly is CO2 snow? Have we used it in clinic before?
Tina Duong 125
I think in class he said endo ice pretty much replaced CO2 snow, and therefore I don't think it's available in our clinic.
Sean Nguyen #160
Hi Tina,
I think that CO2 snow is CO2 gas that comes in a high pressure bottle, much like a mini fire extinguisher. I haven't seen it in clinic but here goes my chemist explanation.
When you spray the CO2 gas from the high pressure bottle onto your cotton pellet, the gas becomes a solid. It should look like the 'endo ice' snow on your cotton pellet, except that CO2 snow is colder (-78oC). I think that's another reason why the CO2 snow also creates craze lines on newly erupted permanent teeth as opposed to 'Endo ice'. Dr. Duperon mentioned that newly erupted permanent teeth have high water content, causing them to have an adverse reaction to the very cold CO2 snow. Brrr!
Hope this helps,
Raquel Ulma #188
Dr. Duperon mentioned that MTA comes in different colors, a light one and a dark one. Are there many more shades of this material?
We've heard many good things about MTA in class. Has anyone had the chance to use it?
Thanks,
Raquel Ulma #188
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