Objective: The objective of this study was to evaluate the mechanical and physical properties of a new non-HEMA containing hybrid ionomer resin formulation.
Methods: A terpolymer composed of acrylic acid (AA), itaconic acid (IA), and methacryloyl glutamic acid in a molar ratio of 8:2:1 was synthesized using a free-radical polymerization. This terpolymer was formulated with a vinyl modified b -alanine (acryloyl b -alanine) ,polyacrylic acid, hydroquinone, diethylaminoethylmethacrylate and camphoroquinone to produce a non-HEMA containing hybrid ionomer resin composition. Three formulations were prepared by varying the polyacrylic acid content (A-0 wt.%, B- 6 wt.%, and C-13 wt%) . Each formulation was mixed with Fuji II LC glass (GC Corporation, Tokyo, Japan) in a ratio of 2 parts glass to 1 part resin by weight. The compression strength (CS), diametral tensile strength (DTS) and shear bond strength (SBS) to human dentin for each formulation was determined.
Results: The results are given in the table below.
|
Formulation |
CS (MPa) |
DTS (MPa) |
SBS (MPa) |
|
A |
184.3 (14.86) |
19.1 (2.9) |
19.5 (4.8) |
|
B |
185.5 (56.3) |
20.8 (2.8) |
15.1 (4.1) |
|
C |
190.4 (17.4) |
29.6 (9.7) |
19.9 (4.2) |
Comparison of the results with ANOVA and Tukey’s test (p=0.05) revealed no significant differences between the formulations.
Conclusion: A new non-HEMA containing hybrid ionomer was found to have adhesive and mechanical properties that were comparable to those reported in the literature for HEMA containing systems