Method: A stainless steel die with an artificial sulcus (depth 2.0 mm, width of 50 µm) was used. The sulcus was continuously rinsed with Tetraspan® 6% during impression taking using a Perfusor® with four different flow rates (4, 8, 12, 16ml/h). Seven IM were selected to investigate the depth of penetration into the artificial sulcus. The IM used were Affinis Precious (AP, Coltène Whaledent), Aquasil Ultra (AU, Dentsply DeTrey), EXA`lence (EXA, GC), Express2 (EX2, 3M ESPE), Identium (ID, Kettenbach), Impregum (IP, 3M ESPE) and Panasil (PA, Kettenbach). Distance between the feather edge of IM and sulcus bottom (SB) was measured at 11 predefined measuring sites (N=22) 1h after mixing using a microscope (M420 Leica, Bensheim). Descriptive statistics were performed.
Result:
Table below shows Mean±[SD]. Negative values indicate a gap between IM and SB. Superscript letters represent statistically equivalent means for each flow rate.
|
Distance for Sulcus Flow rate / mm |
||||
IM |
4 ml/h |
8 ml/h |
12 ml/h |
16 ml/h |
|
AP |
-0,049±[0,087]a |
-0,052±[0,143]a |
-0,077±[0,129]a |
-0,145±[0,142]a |
|
AU |
0,000±[0,000]b |
0,000±[0,000]b |
-0,032±[0,056]a |
-0,343±[0,208]b |
|
EXA |
-0,004±[0,020]b |
-0,017±[0,030]a |
-0,022±[0,031]a |
-0,234±[0,151]c |
|
EX2 |
-0,360±[0,066]c |
-0,418±[0,154]c |
-0,550±[0,260]b |
-0,682±[0,198]d |
|
ID |
-0,033±[0,038]a |
-0,031±[0,040]a |
-0,124±[0,050]c |
-0,642±[0,533]d |
|
IP |
-0,795±[0,214]d |
-1,438±[0,341]d |
-1,447±[0,379]d |
-1,649±[0,318]e |
|
PA |
-0,084±[0,072]e |
-0,176±[0,208]e |
-0,597±[0,129]b |
-0,832±[0,335]d |
|
Conclusion:
According to the results of this study for all flow rates a significant lower penetration depth for IP and EX2 can be detected.