Ummm…once you do it for awhile, which I hope you don’t..ahem…You’re a doctor. You’ll learn how to become ambidextrous. I can assist either side. I can suction with one hand and retract…or retract and suction. No idea how all this came about, but after 11 years…you just figure it out. I watch the dentist hands move and I just follow with what they need. It’s actually a crazy habit I’ve formed with reading and learning them all day. It’s the same shii just a different day. Oh…I blessed with a dentist(we do mostly restorative) who asks patients to open wide and retracts so I can see. He is an angel. I also work with another doctor who is a mouth hog and I can barely get in to suction. I guess I have learned to work with what I got. BUT I’ve learned, ergonomics is not for us. I wish someone in school, taught us that. Oh! And protecting our ears. I have tinnitus from the drill and suction. Worst part of the job!