Method: The new temporary resin cement was formulated with a dimer acid based hydrophobic resin system composed of DDCDMA (Dimer Dicarbamate Dimethacrylate) and UDMA (Urethane Dimethacrylate) with TMPTMA (Trimethylolpropane Trimethacrylate) added as a minor component and 40-44wt% inorganic filler. The dual-cure system was composed of a base and a catalyst: the base contained camphorquinone/ethyl-4-dimethylanimobenzoate as the photoinitiator and the catalyst utilized benzoyl peroxide as the chemical cure radical initiator. Working and setting time, water absorption and solubility, film thickness, depth of cure, and flexural strength and modulus were carried out according to the International Standard ISO 4049:2009. Results were compared with three commercially available temporary resin cements: TempBond Clear (Kerr), Telio CS Link (Ivoclar Vivadent) and SensiTemp (Sultan Healthcare). The data was statistically analyzed (ANOVA, Tukey’s, p<0.05).
Result: For each series, similar letters indicate that no statistical differences were found.
|
Working Time (min:sec) |
Setting Time (min:sec) |
Flexural Strength-Chemical Cure (MPa) |
Young's Modulus-Chemical Cure (MPa) |
Water Absorption (µg/mm3) |
Water Solubility (µg/mm3) |
Film Thickness (µm) |
Depth of Cure (mm) |
EXP |
2:32 |
4:20 |
24.1±1.2a |
339.0±38.0a |
8.6±0.4a |
0.9±0.4a |
35.4±2.1a |
2.68 |
TempBond Clear |
2:08 |
3:58 |
6.0±0.0b |
70.7±0.0b |
119.5±4.7b |
14.6±3.3b |
21.2±4.9b |
3.94 |
Telio CS Link |
3:16 |
7:00 |
8.4±0.0b |
75.6±0.0b |
71.9±5.7c |
9.7±2.3c |
N/A |
1.90 |
Sensi Temp |
2:28 |
4:22 |
50.7±3.2c |
1780.0±130.0c |
125.8±5.5b |
24.8±2.5d |
34.4±6.4a |
N/A |
Conclusion: The experimental formula shows exceptionally low water sorption and water solubility compared to commercial materials. Depth of cure is well above the ISO minimum of 1.5mm, and other properties such as flexural strength and film thickness are comparable to marketed temporary materials included in this study.