1024 Comparing Hydrophilicity of VPS Materials in the Unset Stage

Friday, March 23, 2012: 3:30 p.m. - 4:45 p.m.
Presentation Type: Poster Session
M. NEGLIA, D. NOBREGA, N. SHAKOURIAN, G. KUGEL, and R.D. PERRY, Tufts University, Boston, MA

Objectives: To evaluate the initial water contact angles of seven VPS wash materials in the unset stage using a standardized method in an effort to determine which material(s) would produce the most accurate impression.

Methods: The hydrophilic properties of VPS wash materials were determined by the commercially available Drop Shape Analysis System DSA 30 (Kruss). Materials tested included six marketed VPS light body products: Aquasil UltraLV Fast Set (AQU, DENTSPLY,LOT#100608), EXA'lance Light Body Regular Set (ELB, GC America Inc.,LOT#1012131), Flexitime Light Flow (FLF, Heraeus,LOT#350024), Imprint 3 Quick Step Light Body (IQS, 3M ESPE,LOT#439507), Panasil Initial Contact Light (PCL, Kettenbach,LOT#110251), Take 1 Advantage Light Body Wash (TAL, Kerr,LOT#34149). In addition one experimental VPS light body was tested, Experimental Wash (EXP, 3M ESPE, Lab-FW-Misch-0574). Samples were collected (n=6) for each material at room temperature (23C) and measurements were recorded at 25frames/second. Contact angles 20-seconds after start of mix at 2-second drop age were used as a basis for comparison. A one-way ANOVA and a Tukey test were conducted to determine the statistical significance (Minitab version 15).

Results:

Contact Angle Values at 2-seconds

Materials (n=6)

Mean(SD)

AQU

69.2(1.3)f

ELB

64.2(1.3)e

EXP

23.2(0.7)a

FLF

45.2(0.4)b

IQS

53.1(0.9)c

PCL

57.6(3.5)d

TAL

53.1(1.8)c

Materials with the same letters are not significantly different from each other.

Conclusions: All materials showed contact angles small enough to be considered hydrophilic (θ<90). Experimental Wash was found to have the lowest mean contact angle (23.183, p<0.05), indicating that when taking an impression this material may have the most rapid hydrophilic effect, possibly producing an impression with more detail. The clinical relevance has yet to be tested.

 

This abstract is based on research that was funded entirely or partially by an outside source: 3M ESPE

Keywords: Dental materials, Impression materials and VPS Materials