as far as dental x-rays go, they are harmless for the patient that receives maybe 10 a year max.    go ahead and strike me off.  memes like the one above are funny but you should keep in mind this xkcd.com comic below:

https://xkcd.com/radiation/ 

 if I am administering thousands of x-rays a year, I'd rather reduce that radiation for myself and the staff. 

https://m.primal.net/IoOH.png 
https://m.primal.net/IoOJ.png