it's disposable!

I went to the dentist today and was kind of surprised. Practically everything was disposable. The toothbrushes that you use before your appointment then throw away, the part of the x-ray machine that your mouth is on, the little tub that holds the toothpaste, the tip of the big electric tooth brush, the list goes on and on. My point is that we are able to reuse things, so why shouldn't dentists? Unfortunately, it doesn't really stop at just dentists. I was just finished getting a shot when I realized that the syringe was just being thrown away. I mean, it wasn't exactly sterile anymore, but if the syringe was made a little bit better, it probably could be sterilized. I wonder how much plastic and metal that would save.