10% of the VLCs delivered < 400 mW/cm2
only 41% of the 526 VLC units had intact light tips, 27% were contaminated with composite or bonding agent residues, 14% were damaged, and 18% were both contaminated and damaged.
54% (n = 286),of dentists used a shorter exposure time which would not deliver 16 J/cm2.
48% (n = 145) of offices reported that they do not check the output.
14% of the dental offices used no eye protection.
More awareness about the VLCs used in the dental office is required.
Prior to using the patient simulator, students and their instructors thought that the students were delivering an adequate amount of energy when light curing. There was a 24 to a 52% increase in the mean radiant exposure delivered after instruction compared to before instruction.
The characteristics of the LCUs influenced the photoactivation of the RBCs. The use of a wide tip with a homogeneous light distribution is preferred when light curing RBCs using a bulk curing technique.
The irradiance and radiant exposure can be greater when a right-hand operator is positioned on the right side of the chair and a left-hand operator is positioned on the left side of the chair.
Differences in spectral peak, irradiance, radiant exposure, output stability, mouth accessibility, and tip size are described for a variety of light-curing units.