Let me reiterate. It is illusionary in the aspect that there is no truth. Truths are dependent on the circuitry they are built on and these circuits could be built a myriad of ways.
The awareness that these circuits funnel back to "feels" the experience so in that regard the teeth being knocked out would register "pain" as part of the circuit.
Ever see the matrix?
Real is the root of reality and reality is a function of projected consciousness.