It would seem, from your facts, that the Dentist is just not very professional. But you have not provided any facts that would give into discriminatory or illegal behavior. Perhaps it's time to dust off the resume and start looking for a better job.
This is not legal advice nor does it create an attorney-client relationship. This is for education and informational purposes only. It is always recommended that you contact an attorney with any concerns as each individual case is unique.
Unfortunatly, it is not unlawful for your boss to be a jerk; rather it is only unlawful if this behavior was motivated by some discriminatory reason or in retaliation for you making a complaint about some illegal activity or asserting a protected right under the law. If you believe that in fact the reason for the hostile work environment was due to such unlawful reasoning, you should speak to an employment attorney right away.
Any information provided here is for information purposes only and is not to be construed as legal advice or intended to create an attorney client relationship. Attorney Michael Goldstein is licensed in Massachusetts only and is associated with counsel in RI, MD and DC.