Providers can do Dentist, Hygienist recalls or a combination of both. They must be set up for each type in the recall configuration screen.
Go to Administration->Manage Recalls
Click the Configure Recalls (Spanner) button:
In the Recall Parameters screen you will see the 2 recall types and which providers are assigned to them. To update this double-click either Dentist or Hygienist Recall Type (in this example it is Dentist) to open the Edit Recall Type window:
In the Edit Recall Type window in the section marked Providers Assigned to this Recall Type use the Insert a Recall Type Provider into the list button, select the provider and click Ok.
Repeat this for any additional providers and click Ok.