Characterization of New Quick Setting Polyether Impression Materials

0138 Characterization of New Quick Setting Polyether Impression Materials

B. GANGNUS, T. KLETTKE, C. FUEHRER, B. KUPPERMANN, and A. ROMBACH, 3M ESPE AG, Seefeld, Germany

Objective: of this study was to compare the material properties of the new quick-setting Impregum Penta Soft Quickstep HeavyBody (HBQ) / MediumBody (MBQ) and Impregum Soft Quickstep LightBody (LBQ) with the well established normal-setting Impregum Penta Soft HeavyBody (HB) / MediumBody (MB) and Impregum Garant Soft LightBody (LB).

Methods: consistency (CO), total working time (WT), detail reproduction (DR), linear dimensional change (LC), compatibility with gypsum (CG), recovery from deformation (RD) and strain in compression (SC) acc. to ISO 4823:2000, tear strength (TS) and elongation at break (EL) acc. to DIN 53504.

Results: five specimens each were tested and analysed by 2-sample t-test (Mean (StDev)) for corresponding pairs HBQ-HB, MBQ-MB, LBQ-LB. Statistically significant differences (p < 0,05) are marked with an asterisk.

CO [mm]

WT
[sec]

LC
[%]

RD
[%]

SC
[%]

TS
[MPa]

EL
[%]

HBQ

33,1 (0,42)*

141 (8)*

-0,33 (0,05)

98,28 (0,04)*

2,78 (0,04)*

2,30 (0,23)*

391 (37)

HB

34,5 (0,35)

195 (4)

-0,31 (0,03)

98,02 (0,06)

5,53 (0,12)

1,88 (0,21)

360 (53)

MBQ

35,5 (0,35)

129 (8)*

-0,38 (0,08)

98,08 (0,08)

2,64 (0,05)*

2,29 (0,16)*

330 (25)

MB

35,7 (0,45)

174 (13)

-0,33 (0,06)

98,02 (0,07)

5,19 (0,11)

1,82 (0,21)

301 (56)

LBQ

41,6 (0,55)

150 (4)*

-0,38 (0,004)

98,83 (0,06)

4,83 (0,12)*

1,63 (0,07)

224 (13)

LB

41,4 (0,55)

195 (4)

-0,40 (0,028)

98,96 (0,07)

5,32 (0,13)

1,70 (0,14)

245 (35)

For DR the required 20痠 (LB, LBQ, MB, MBQ) or 50痠 line (HB, HBQ) and for CG the required 50痠 line for all materials was visible for all specimens.

Conclusion: the new quick-setting polyethers are similar to controls despite small differences. HBQ reveals lower CO and higher RD. TS was improved for MBQ/HBQ. Fast set (WT) in combination with higher rigidity (indicated by lower SC) could make this materials especially attractive for dual-arch technique impressions.

Seq #17 - Dental Materials: Endodontics, Impression Materials, Surface Properties
9:00 AM-11:00 AM, Friday, 27 August 2004 Crowne Plaza Hotel SEDIR III

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