Today at the dentist I got to try the inspection camera because I really wanted to see what was going on in my mouth and I have looked at everything and anything from HF to so called hi end inspection cameras.
Virtually anything under $1000 lack automatic focus and the slightest movement makes the image useless - so you get nothing except crap - they tell me.
What the dentist had was definitely high grade with automatic focus etc.
In spite of that the resolution was relatively POOR. No better than if you used high intensity lighting and mirrors to look in your own mouth.
So unless I hear or see something different - my search is over.