Is it normal to feel stuck 3 years into your first job?

I've been at my first practice out of residency for 3 years. The owner is nice, pay is okay, but I feel like I'm not growing. I'm doing the same procedures over and over. No mentorship, no challenging cases, just bread and butter dentistry. I'm getting bored. Is this normal? Should I be looking for something more challenging or is this just what dentistry is? I thought I'd be doing more interesting work by now.