With all those plates and screws it's stll not stable.... God does this ever end
Kristen, you should select a random sample from the board (i.i.d.)
Like you list all users and pick 20.
You constantly hear back from them and you make a test, considering:
1) starting point
2) surgeon reputation
3) Pre existing problems (tmj..apnea..)
And then your Y is Patient satisfaction.
If at a confidence interval of 90% (1.64) you verify patient satisfaction you should go for it.
If not....find another option.