If it has to be FDA approved it will be taxed is the easy version of how it works. It is just that not all of them will line item the tax for you to see it without pulling pre-2013 invoices and a calculator. Alloys, implant parts, denture teeth, acrylics, ceramics, milling blanks, pressable ingots, burrs, wheel chairs, massage/chiropractic tables, dental chairs, air handpieces, radiograph eqiupment, and a partidge in a pear tree. Basically any class II device, which covers a WHOLE lot more than is easy to name.
Edit: In December we gotta dall from our main supplier reps asking if we wanted to stock up on things before it hit, they were having mini-sales on top of the year end hoopla that usually occurs.