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.
Good professional voicemail greeting examples. A business named Lorem Ipsum, which sells widgets, wants to leave a brief message that confirms for the listener that they have called the right business. The message would also prompt the caller to provide information needed to return the call, and throws in a nice quick promotional note.

There's no single best way to craft an after hours greeting. The most important point is that you equip your customers with what they need to know, and give them an avenue to contact you, whether that's through voicemail, email, or other channels.
Note that the secretary has asked for the reason for calling so she can prioritize the patients who need the most help. She’s also keeping it short and to the point.