Speed of polymerisation While the speed of polymerisation
is not directly related to the energy-intensity
of a light source, there is one strong relationship:
Plasma Arc tech- nology is the absolute leader with
average curing times as low as 3-4 seconds, QTH
is 4 times slower and LED can take more than 5 to
6 times this curing time.
Quality of the restoration Recent studies show no
differences in the quali- ty of restorations performed
with the different curing technologies. However,
from a clinical point-of-view one can state that
the fast curing of Plasma Arc technology makes it
possible to use the layer technique more efficiently
and therefo- re often prevents problems such as
post-opera- tive pain caused by shrinkage stress.
Safety of the treatment All curing sources are safe,
however, QTH and Plasma Arc will create more heat
than LED, but as their curing cycles are significantly
shorter they are well within safety standards.
Range of applications With its high-energy output
within a very broad spectrum, the Plasma Arc technology
is suitable for all dental light-curing applications.
Applications for LED are very limited due to its
limited spectrum and power output, with QTH curing
times being extremely extensive.