Where can I find pictures of old time dental machines?

Question

For example X-ray machines, patient chair, and anything like that

Answer 1

Here are some great pictures of the world's first Cavitron. I know, because I own it (still) and I took the pictures! This piece is over 50 years old.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=010&sspagename=STRK%3AMEUS%3AIT&viewitem=&item=200034819405&rd=1&rd=1

You can try a Google Images search using antique dental equipment. You can actually find a fair amount of stuff for sale on eBay, also. It changes from time to time, so keep coming back. People sell all kinds of dental antiques and they often have nice photos that you can save. If you move your cursor over any image, take note that some icons appear in the upper left corner. Click on the one that looks like a computer disc and then you can save the image.
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Answer 2

google dental equipment+antique, there are some links there with pics
also: antique dental equipment pictures