Method: For this study, the extrusion forces at 75 mm/min (FEX75) and at 150 mm/min (FEX150) extrusion speed were measured six times for the fast set heavy body materials Imprint 4 Super Quick Heavy (IM4SQ,#505465), Take 1 Advanced Tray Superfast Set (T1SF,#3-2128), Aquasil Ultra Heavy Superfast Set (AQSF,#120913), Exa´lence Heavy Body Fast Set (EXF, #1202171), and Flexitime Xtreme Heavy Tray (FLF,#340379), as well as for the regular set materials Imprint 4 Heavy (IM4R,#505464), Take 1 Advanced Tray Regular Set (T1R,#2-2129), Aquasil Ultra Heavy Regular Set (AQR,#121023), Exa´lence Heavy Body (EXH, #1208281) and Flexitime Heavy Tray (FLR, #380267). The obtained values were evaluated independently for the fast set as well as for the regular set materials at each extrusion speed. The difference in extrusion forces ΔFEX=FEX150-FEX75 was calculated.
Results: Results and standard deviations are shown below. One-way ANOVA and Tukey Test revealed significant differences. IM4SQ as well as IM4R showed the lowest extrusion forces in the respective setting regime and at both extrusion speeds as well as the lowest ΔFEXvalues.
|
FEX75 [N] |
FEX150 [N] |
ΔFEX [N] |
|
Fast Set |
IM4SQ |
347.9±4.4A |
486.0±3.8A |
138.3±5.4 |
T1SF |
637.5±5.9D |
928.9±12.0D |
291.5±12.2 |
|
AQSF |
657.6±8.5E |
1006.5±3.7E |
348.9±9.3 |
|
EXF |
489.2±5.4B |
750.9±10.1B |
261.8±11.1 |
|
FLF |
549.2±6.1C |
859.4±12.0C |
310.2±13.0 |
|
Regular Set |
IM4R |
322.5±3.9A |
457.3±5.8A |
134.8±6.6 |
T1R |
566.6±3.5C |
846.0±6.2D |
279.4±6.7 |
|
AQR |
589.8±2.9D |
914.7±4.3E |
324.9±4.9 |
|
EXR |
509.9±10.0B |
778.5±9.0B |
268.6±12.4 |
|
FLR |
503.6±3.5B |
797.6±0.8C |
294.0±3.8 |
|
Means in each square that do not share a letter are significantly different.
Conclusion: IM4R and IM4SQ showed the lowest extrusion force compared to materials of the same setting regime facilitating an easier and more convenient application of these materials.