Try it, you'll like it.
You can imagine how willingly a four year old child would accept that! the The prosthedontest, however, said he would ask the parents to read a short message (prepared by him) for one week into the childās ear 15 minutes after he/she had fallen asleep.
It would say basically that everyone loved him including the prosthedontist, and that it was a good thing to have this appliance in his mouth. After a week of this subliminal stimulation, he reported that the child would accept the prosthesis with minimal objection.
You can actually try this as a home assignment, with someone whom you have access to after they have gone to sleep. Your message could include the suggestion that the sleeper make you breakfast in bed on the next Saturday morning.
On the other hand, my wife gave up on that idea after I nearly destroyed the toaster oven. In fact I think she is now telling me to stay out of the kitchen.