Worst part is that he only wanted it to fake medical procedures as reinforcement for his Clark Kent persona. This was when he was in school (iirc, i read the comic from my fathers collection as a child) so couldnt possibly have gotten any qualifications for sedation yet

Edit: I think it was golden age supes, iirc he also faked bad eyesight and a broken arm in the same comic. Anyone else knows which story Im recalling? Which one was it? He was planning to send a robot for any later dentistry appointments which lacked the tooth