Polymerization efficiency of glass-ionomer and resin adhesives under molar bands.
OBJECTIVE
To determine the degree of cure of a light-cured resin-modified glass ionomer (RMGI) under molar bands compared with a light-cured resin and a dual-cured resin.


METHODS
The 3 cements used were Fuji Ortho LC, Eagle Spectrum resin, and Variolink II dual-cure. Each sample was indirectly light cured for 20 seconds (10 seconds occlusally, 10 seconds cervically) under sections of molar bands, and the degree of cure was evaluated with micro-MIR FTIR spectroscopy.


RESULTS
The RMGI exhibited a significantly higher mean degree of cure (55.31%) than both of the resins (Eagle 19.23%; Variolink II, 25.42%), which did not differ significantly at alpha = .05 level of significance.


CONCLUSIONS
Higher degree of conversion can be obtained from RMGIs under molar bands compared with composite resin adhesives provided the proper curing technique is used.
Rejman
Daniel John
DJ
Department of Developmental Sciences, Orthodontics, Marquette University, Milwaukee, WI 53233, USA.
Eliades
Theodore
T
Bradley
Thomas G
TG
Eliades
George
G
D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry* / Q000528:radiation effects; D006801:Humans; D008027:Light; D008422:Materials Testing; D008963:Molar; D016910:Orthodontic Brackets; D011108:Polymers / Q000737:chemistry / Q000528:radiation effects; D019279:Resin Cements / Q000737:chemistry* / Q000528:radiation effects; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors
D000180:Acrylic Resins; D000538:Aluminum Silicates; D003188:Composite Resins; C095451:Fuji Ortho LC; D005899:Glass Ionomer Cements; D011108:Polymers; D019279:Resin Cements; C420128:Spectrum composite resin; C103502:Variolink