Long Time Ago
Everyone at one time or another has probably been put through the agonizing task of having to get a pair of wax impressions done on your teeth. I know when I was younger I had to get them done before I had my braces. Another set was done after the braces were taken off. From what I remember the dental lab equipment used to do the impressions took a very long time to process. The other day I had to go in for a set of impressions and I was surprised at how fast the job was finished. The equipment really has come a long way.