Conditioners are used to bond resin modified glass ionomers to dentin.  Purpose: This study examined the shear bond strength to dentin when two conditioners or phosphoric acid was compared to the bond strength to dentin when no surface treatment was used (control).  Methods:  Sixty extracted teeth were ground on a polisher grinder to expose the dentin, which was finished with a series of abrasives ending with 600 grit.  The dentin was etched with 35% phosphoric acid for 10 seconds, or conditioned with 10% polyacrylic acid for 10 seconds or conditioned with 10% polyacrylic acid and 3% aluminum chloride for 10 seconds and compared to no treatment (control).  Each surface treatment was applied without agitation and rinsed with tap water. The Fuji II LC was mixed and inserted into a Teflon tube and placed onto the prepared dentin.  The Fuji II LC was light cured (Optilux 501 with >500mw/cm) for 60 sec. The specimens were thermocycled for 1000 cycles from 6 to 60⁰C, placed into an Instron testing machine model 4411 and loaded in shear until failure.  Data were analyzed with ANOVA and Tukey B test (n=15).  Results: Fractures were cohesive. Mean shear bond strength is shown as MPa (n=10).

Material	Application	Bond strength	Material	Application	Bond strength
Fuji II LC	Control	8.2±2	Fuji II LC	10% PAA	6.2±2.1
Fuji IILC	Phosphoric acid	9.2±1.7	Fuji II LC	10% PAA & 3% AlCl3	9.8±2.5

Results:  All groups were statistically equal (p>.1). Conclusions:  Dentin conditioning procedures do not affect the shear bond strength of Fuji II LC since factures were cohesive.