I’m going to ask you to consider something you probably have never given much thought to: your own voicemail greeting. You may call this your outbound greeting or outgoing message. No matter what you call it, this is what callers hear when you don’t answer your phone. Or should I say, it’s what callers are forced to listen to even though they don’t want to.
The Serial Position Effect states that the human brain is most adept at recalling the first and last items in a series. For sales reps, this psychological phenomenon means that your voicemails are much more likely to be remembered if they're listened to at the beginning or the end of the day.

A dentist is similar to a doctor. Unlike a doctor, a dentist is going to get far more non-urgent calls as patients will want to know when they can pick up various orders, as well as to book follow-up appointments. The key here is prioritizing so the dentist can respond promptly to the patients who need emergency dental work and other urgent consultations.
Give everyone on your team their own employee extension and set up department extensions to ring multiple phones in a flexible structure to connect staff working from multiple locations.