"Quick Checkups" are less profitable. However, Scaling and root planing (periodontal treatment) is super profitable which is just a more time intensive version of a checkup. I do know of some dentists that tell their hygienists to not do a good job so they can get the periodontal treatment and charge $400 a quarter instead of $150 every 6 months.
Source: Wife was a hygienist before she burned out from contortionist body pain and having to make commission.
Source: Wife was a hygienist before she burned out from contortionist body pain and having to make commission.