Objective: To formulate and evaluate a light-cured fluoride-releasing restorative resin composite based on pre-reacted glass ionomer fillers. Methods: Glass ionomer fillers were reacted with polyacrylic acid and the resulting paste was dried in an oven at 110°C for four hours. After drying, the fillers were ball-milled to the lowest possible particle size and mixed with a mixture of glass fillers, Sr glass and silica, to make up the filler portion of the composite. The liquid component consists of BisGMA, UDMA, TEGDMA and polymerizable unsaturated monomers that contain acid groups used along with camphroquinone (CQ) and ethyl 4-dimethylamino benzoate (EDMAB). The paste was formulated by weight to a filler:liquid ratio of 80:20. Diametral tensile strength (DTS), compressive strength (CS), flexural strength (FS), flexural modulus (FM) and cumulative fluoride release [F^-] after 96 hrs were measured for the experimental material and compared to commercial F-2000 Compomer (3M). Results: For each property, mean (±SD) values were calculated, and are summarized in the table below.

Materials	DTS(MPa) (n=8)	CS(MPa) (n=8)	FS(MPa)      (n=6)	FM(GPa) (n=6)	[F-] (n=3) mg/cm2
Experimental	37.7(1.6)	232.1(20.6)	53.5(4.4)	11.6(0.4)	35.9 (3.2)
F-2000	28.9(1.8)	248.0(18.8)	34.7(4.2)	12.1(0.4)	28.3 (1.2)

Paired t-tests revealed significant differences in DTS (p<0.001), FS (p<0.001) and [F^-]   (p=0.02), but not in CS  (p=0.116) or FM  (p=0.098), between the experimental and control material (F-2000). Data suggest that the experimental fluoride-releasing composite resin exhibits comparable or better physico-mechanical properties when compared to commercial F-2000 compomer. Conclusion: From the results, the present formula has a potential application in formulating a future generation of fluoride- releasing composite resin that could be used in non-stress bearing restorative applications.