- All necessary efforts will be taken to reduce any mild discomfort that could be associated with the probe placement inside the oral cavity of a subject. The OCT probe or the confocal microscope will be covered by a plastic barrier and disinfected by standard methods used for oral cavity instruments before and after subject usage. The device examination will take no more than 15 minutes in addition to the subject's appointment time for their routine visits. The maximum intensity of tissue illumination for each measurement will be less than the Threshold Limit Value (TLV) established by the American Conference of Governmental Industrial Hygienists (ACGIH)11 for exposure to broadband light.