Have you heard of prepping all lower teeth and putting on crowns that are all connected in one piece ?

Is connecting all the crowns together done?  Yes, but generally it is not the best way to crown the teeth unless there is severe mobility (looseness of the teeth) cause by loss of bone and periodontal disease.My preference any time that I can, I want the teeth done with individual crowns.  This enables the patient to better clean and floss the teeth, which may be very difficult when all the crowns are joined together.  Thus, it may allow gum disease to increase.Another problem with multiple teeth joined, is that it makes it much more difficult for the lab to get a good fit.A third problem, is that if one tooth broke or became loose the whole bridge would need to be redone.  And last, but not least, generally speaking doing the crowns individually will look much more natural than joining them all together.By doing them individually, much of the down side risks can be eliminated.Good luck!