That's the only "dirty" part of the job. Otherwise, it is a job that does not require any intellectual or physical efforts and brings a lot of money.
I went to a dentist 2 years ago and thought that 2 visits would be enough to fix the pb I had. I was completely wrong, he kept finding things to fix in my mouth that I was visiting the clinic almost on a weekly basis for more than 2 months, until I reached the quota of my dental care plan. The last time I visited, he performed a route canal without freezing around the tooth. That route canal made me decide not to go there again, never.