Meet Dan Tootin, The Madcap Dentist -
Dan debuted in Hit Comics #9 (1941), from Jack Cole working under the name Ralph Johns. He had about 3 dozen one-page adventures over the next few years.
Here's about half of them...
"Now, Why can't I invent something like that?" became his final line. Seems like a good way to wrap up his series.
page art from Hit Comics #s 14, 17, 18, 20, 22, 27, 29-33, 37, 38, 40, 42, 43, & 46 (1941-1947)