Mechanical properties and degree of conversion of etch-and-rinse and self-etch adhesive systems cured by a quartz tungsten halogen lamp and a light-emitting diode.
The aim of the present study was to evaluate the degree of conversion (DC), elastic modulus (E), and flexural strength (FS) of five adhesive systems (only the bonding component of both Scotchbond MP-SBMP and Clearfil Protect Bond-CP; Single Bond 2-SB2; One-up Bond F Plus-OUP; and P90 System Adhesive: primer-P90P and bond-P90B) cured with a quartz tungsten halogen (QTH) lamp and a light-emitting diode (LED). Two groups per adhesive were formed (n=5), according to the light source (quartz tungsten halogen-QTH: Demetron LC; and light-emitting diode-LED: UltraLume 5). Bar-shaped specimens were evaluated using three-point bending. The DC was obtained by Fourier transform infrared spectroscopy (FTIR). SB2 and P90P exhibited better DC values for QTH curing. However, SB2 and P90P presented the worst results overall. The light source was statistically significant for all adhesives, except for P90B and OUP. Non-solvated adhesives presented the best E and FS values. It could be concluded that the DC and E values can be influenced by the light source; however, this interference is material dependent.
Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Av. Limeira, 901 - Areião, 13414-903 Piracicaba, SP, Brazil. livia_aguilera@hotmail.com
Lívia Aguilera
LA
Gaglianone
Adriano Fonseca
AF
Lima
Luciano Souza
LS
Gonçalves
Andrea Nóbrega
AN
Cavalcanti
Flávio Henrique Baggio
FH
Aguiar
Giselle Maria
GM
Marchi
D000268:Adhesiveness; D000269:Adhesives / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D055117:Curing Lights, Dental; D055119:Elastic Modulus; D006219:Halogens / Q000737:chemistry; D008027:Light; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013314:Stress, Mechanical; D014414:Tungsten / Q000737:chemistry
D000269:Adhesives; D001672:Biocompatible Materials; D006219:Halogens; D011108:Polymers; D019279:Resin Cements; C041330:Scotchbond; D014414:Tungsten