Just an update: Dr Angel changed my appointment time to her last of the day. Only after everyone left, she called me back and took x-rays of the implant they had to replace, even though I was there for a cleaning and routine check-up.
After taking X-rays of the implant (that she originally had to replace under warranty within the year, although her office originally tried to say it was past the year--thank God for credit card receipts!), she told me she didn't want me as a patient anymore. Just to clarify, she had her office call me that day, change my appointment time to the last person she saw, make a trip down to her office, wait in the waiting room until all her other patients left, took x-rays of my implant (probably to protect her backside since she originally replaced a molar with a HOLLOW implant causing it to break with use), before telling me she didn't want me as a patient.