Polymerization capacity of orthodontic composites analyzed by Fourier transform infrared spectroscopy

Niobium pentoxide phosphate invert glass as a mineralizing agent in an experimental orthodontic adhesive

“…DC values observed in this study may have been due to limited mobility of reactive groups caused by the rapid formation of a cross-linked polymeric network. 29 Similar values were found for commercial orthodontic adhesives. 29 Orthodontic adhesives were formulated with 75% wt of BISGMA, a viscous monomer that may have a great impact on the mobility.…”

“…29 Similar values were found for commercial orthodontic adhesives. 29 Orthodontic adhesives were formulated with 75% wt of BISGMA, a viscous monomer that may have a great impact on the mobility. Also, PIG-Nb particles may have increased the viscosity of the adhesive 30 and produced light diffraction into the polymer matrix, resulting in a reduced DC.…”

“…Lower DC may result in inferior physical-mechanical properties and clinical performance, such as poor bond strength. 29 In this study, the addition of filler reduced immediate SBS results with an increase in the bond strength after 28 days of immersion in artificial saliva. It could be hypothesized that mineral deposits after immersion increased SBS values for PIG-Nb containing adhesives.…”

Assessment of the degree of conversion in light-curing orthodontic resins with various viscosities

“…These components are exposed to oral fluids and they contact oral tissues throughout orthodontic treatment. Although they are widely accepted in modern dentistry, the composition of these materials presents cytotoxic properties that can be hazardous to patients' health [13,[15][16][17]. Studies show that monomer leaching from resins can occur at two time points: during the resin setting period and when the resin is degraded [18].…”

Effect of Photoinitiator Type and Photoactivation Condition on the Physical-Mechanical Properties of Orthodontic Resins

“…In the last few years, third generation light emitting diode appliances (LED) have been introduced on the market. Such equipment exhibits an additional light emission peak, which has a lower light intensity in comparison to the main peak 5,8 . Such configuration, combined with a broad light emission spectrum presented by of some models, aims to promote a suitable degree of conversion in a shorter polymerization period, reducing the chair time 5,9,10 .…”