I believe that allowing DA II's to scale would be jeopardizing the health and well-being of all patients.  Not only will the patient's periodontal health potentially suffer, but the patient's overall health could be in jeopardy as well.  During these procedures, a well-educated hygienist looks for any signs of oral cancer, nutritional and pharmacological factors, and other systemic condtions that can contribute to the patient's health status. By detecting these contributing factors early and by treating accordingly, periodontal status can be maintained and other problems can be warded off before they become serious.  By allowing individuals with far less education to perform scaling, this would limit the complete treatment received by the  patient.  Even though the dentist maybe following up with each patient, he/she does not have the time to spend examining all of the above mentioned aspects. Because a person is considered a Perio I, does this mean that he/she is entitled to less care??? I think not.