The logistical difficulties and considerable expense of long term placebo controlled clinical trials of
dietary components mean it is unlikely that high level evidence linked to cardiovascular disease outcome will be obtained in the near future.
Level II dental assistants obtain additional training in intra-oral duties, which
means they are able to do everything a Level I dental assistant can do along with; dental radiography, mechanical polishing of the coronal portion of the teeth, placement and removal of rubber dams, taking of preliminary impressions of teeth for study models, topical application of anti-cariogenic agents, oral hygiene instruction with an intra-oral
component,
dietary counseling relative to dentistry, application of materials topically to prepare the surface of the teeth for pit and fissure sealants, application of pit and fissure sealants, application of topical anesthetics, desensitizing agents and whitening of the coronal portion of the teeth.