[matt_heimer]

All reusable dental tools have to go through a sterilization procedure after every use so would it matter? And they could have one-time use sleeves to put on the arms.

I think the main concern would be debris and drool getting on the camera but that is probably a concern for any position.

[eru]

And you can just put some glass over the camera, and have a little wiper or 'lotus effect' coating.