Five novel bifunctional oligomers containing both carboxylic acid and methacrylate groups are synthesized, characterized, and used to formulate compomers by mixing with strontium fluoroaluminosilicate glass powder at a filler level of 75% (by weight). Compressive strength (CS) of the cements and viscosity of the resin liquids are used as screening tools to find the optimal formulation. Diametral tensile (DTS) and flexural strengths (FS) are also determined. Results show that the oligomers derivatized with glycerol dimethacrylate exhibit higher CS than those with 2-hydroxyethyl methacrylate. The CS increases with increasing diluent content, filler level, and light-exposure time. During aging, the cement shows an increase of strength over 24 h and then remains unaltered for up to 3 months. The experimental compomer is 45 and 69% higher in CS, 35 and 174% higher in DTS, and 39 and 170% higher in FS, respectively, as compared to Dyract and Fuji II LC.
Davidson, C.L. and Mjör, I.A. (1999). Advances in Glass-Ionomer Cements, Quintessence Publ. Co., Chicago .
2.
Hotz, P. , McLean, J.W. , Sced, I. and Wilson, A.D. (1977). The Bonding of Glass-Ionomer Cements to Metal and Tooth Substrates , Br. Dent. J., 142: 41-47 .
3.
Lacefield, W.R. , Reindl, M.C. and Retief, D.H. (1985). Tensile Bond Strength of a Glass-Ionomer Cement , J. Prosthet. Dent., 53: 194-198 .
4.
Forsten, L. (1977). Fluoride Release from a Glass-Ionomer Cement , Scand. J. Dent. Res., 85: 503-504 .
5.
McLean, J.W. and Gasser, O. (1985). Glass-Ionomer Cements , Quintessence Int., 16: 333-343 .
6.
Craig, R.G. (1997). Restorative Dental Materials, 10th edn, Mosby-Year Book, Inc., St Louis .
7.
Nicholson, J.W. , Braybrook, J.H. and Wasson, E.A. (1991). The Biocompatibility of Glass-Poly (Alkenoate) Glass-Ionomer Cements: A Review , J. Biomater. Sci., Polym. Edn., 2(4): 277-285 .
8.
Hume, W.R. and Mount, G.J. (1988). In vitro Studies on the Potential for Pulpal Cytotoxicity of Glass-Ionomer Cements , J. Dent. Res., 67(6): 915-918 .
9.
Wilson, A.D. and McLean, J.W. (1988). Glass-Ionomer Cements, Quintessence Publ. Co., Chicago .
10.
Bowen, R.L. and Marjenhoff, W.A. (1992). Dental Composite/Glass Ionomers: The Materials , Adv. Dent. Res., 6: 44-49 .
11.
Kalachandra, S. and Turner, D.T. (1987). Water Sorption of Polymethacrylate Network: BisGMA/TEGDMA Copolymers , J. Biomed. Mater. Res., 21: 329-338 .
12.
Kalachandra, S. and Wilson, T.W. (1992). Water Sorption of and Mechanical Properties of Light-cured Proprietary Composite Tooth Restorative Materials , Biomaterials, 13: 105-109 .
Wang, G. , Culbertson, B.M. and Seghi, R.R. (1999). Strength, Abrasive Wear, and Durability Properties of Dental Composites Containing a Fluorinated Dimethacrylate Reactive Diluent , J. M. S. Pure Appl. Chem., A36(3): 373-388 .
15.
Xie, D. , Brantley, W.A. , Culbertson, B.M. and Wang, G. (2000). Mechanical Properties and Microstructures of Glass-Ionomer Cements , Dent. Mater., 16(2): 129-138 .
16.
Meyer, J.M. , Cattani-Lorente, M.A. and Dupuis, V. (1998). Compomers: Between Glass-Ionomer Cements and Composites , Biomaterials, 19: 529-539 .
17.
Kwon, Y.H. , Kwon, T-Y. , Ong, J.L. and Kim, K.H. (2002). Light-Polymerized Compomers: Coefficient of Thermal Expansion and Microhardness , J. Prosthet. Dent., 88(4): 396-401 .
18.
Kusunoki, M. , Itoh, K. , Hisamitsu, H. and Wakumoto, S. (1998). Marginal Adaptation of Commercial Compomers in Dentin Cavity , Dent. Mater. J., 17(4): 321-327 .
19.
Subelka, J.C., Jefferies, S.R., Kapperman, D.A., Hammesfahr, P.D. and Silver, P.A. (2002). Dental Composite Restorative Material and Method of Restoring a Tooth, US Patent No. 6353040.
20.
Yuhda, S. and Kameda, H. (2000). Method of Setting a Dental Cement Composition, US Patent No. 6063832.
21.
Young, A.M. , Rafeeka, S.A. and Howlett, J.A. (2004). FTIR Investigation of Monomer Polymerisation and Polyacid Neutralisation Kinetics and Mechanisms in various Aesthetic Dental Restorative Materials , Biomaterials, 25: 823-833 .
22.
Van Dijken, J.W.V. (1996). 3-year Clinical Evaluation of a Compomer, A Resin-modified Glass-Ionomer and A Resin Composite in Glass III Restorations , Am. J. Dent., 9: 195-198 .
23.
Xie, D. , Chung, I.-D. , Wu, W. and Mays, J. (2004). Synthesis and Evaluation of HEMA-free Glass-Ionomer Cements for Dental Applications , Dent. Mater., 20: 470-478 .
24.
Wang, G. , Culbertson, B.M. , Xie, D. and Seghi, R.R. (1999). Effect of Fluorinated Triethylene Glycol Dimethacrylate on the Properties of Unfilled, Light-cured Dental Resins , J. M. S. Pure Appl. Chem., A36(2): 237-252 .
25.
Wu, W. , Xie, D. , Puckett, A. and Mays, J. (2003). Synthesis and Formulation of Vinyl-containing Polyacids for Improved Light-cured Glass-Ionomer Cements , Eur. Polym. J., 39: 663-670 .
26.
Asmussen, E. (1982). Restorative Resins: Hardness and Strength vs. Quantity of Remaining Double Bonds , Scand. J. Dent. Res., 90: 484-489 .
27.
Asmussen, E. (1982). Scand. J. Dent. Res., 90: 490-496 .
28.
Kawahara, H., Makita, T., Kudo, S. and Funakoshi, T. (1984). Dental Restorative Composition, US Patent No. 4431421.
29.
Wang, G. , Culbertson, B.M. , Xie, D. and Seghi, R.R. (1999). Physical Property Evaluations of Perfluorotriethylene Glycol Dimethacrylate as a Potential Reactive Diluent in Dental Composite Resins , J. M. S. Pure. Appl. Chem., A36(2): 225-236 .
30.
Xu, H.H. and Quinn, J.B. (2001). Whisker-reinforced Bioactive Composites containing Calcium Phosphate Cement Fillers: Effects of Filler Ratio and Surface Treatments on Mechanical Properties , J. Biomed. Mater. Res., 57(2): 165-174 .
31.
Xu, H.H. (2000). Whisker-reinforced Heat-cured Dental Resin Composites: Effects of Filler Level and Heat-cure Temperature and Time , J. Dent. Res., 79(6): 1392-1397 .
32.
Braem, M. , Finger, W. , Van Doren, V.E. , Lambrechts. P. and Vanherle, G. (1989). Mechanical Properties and Filler Fraction of Dental Composites , Dent. Mater., 5(5): 346-348 .
33.
Johnson, W.W. , Dhuru, V.B. and Brantley, W.A. (1993). Composite Microfiller Content and its Effect on Fracture Toughness and Diametral Tensile Strength , Dent. Mater., 9(2): 95-98 .
34.
Wu, W. , Xie, D. , Puckett, A. and Mays, J. (2003). Synthesis and Characterization of Self-cured Amino Acid Modified Glass-Ionomers , Eur. Polym. J., 39: 959-968 .
35.
Xie, D. , Wu, W. , Puckett, A. , Farmer, B. and Mays, J. (2004). Novel Resin Modified Glass Ionomer Cements with Improved Flexural Strength and Ease of Handling , Eur. Polym. J., 40(2): 343-351 .
36.
Wilson, A.D. (1990). Resin-modified Glass-Ionomer Cement , Int. J. Prosthodont., 3: 425-429 .
