IADR Abstract Archives

Aesthetic and wear properties of several commecial and experimental composites

Aesthetic properties and wear comparisons of commercial and a new experimental composite materials.  S.B. MITRA*, B.D. CRAIG, G.A. KOBUSSEN, H.L. LECHUGA, M.R. ATKINSON, 3M ESPE Dental Products and 3M Corporate Analytical Tech Center, 3M Company, St. Paul, MN, USA.

Objectives:  To characterize the polish retention, wear resistance, and aesthetic characteristics of commercial and experimental composite materials through toothbrush abrasion and  3-body wear testing.

Methods:   Atomic Force Microscopy (AFM), Optical Scanning (Wyko analysis), and gloss measurement of polished and tooth-brushed surfaces were done.  Three-body wear testing (ACTA wear tester) was performed. Materials tested:  nanocomposite Filtek Supreme Plus (FS-DEB, FST), an experimental nanocomposite material in the Dentin/Enamel/Body (EXP-DEB) and translucent shades (EXP-T), microhybrids Tetric Evoceram (TEC), Premise (PM), and Esthet-X (EX).  Five highly polished tiles of each material were tooth-brushed for 6000 strokes and the resulting gloss retention (GR) at 60º was measured by a micro-tri-gloss instrument.  The same samples were then subjected to topographical study using an Atomic Force Microscope (AFM) operated in tapping mode.  Three-body wear properties of the DEB shades and other aesthetic properties of the materials were characterized.

Results:

Table I:  GR at 6000 strokes of toothbrushing, measured at 60 º.

Sample

FS DEB

FST

TEC

PM

EX

EXP-DEB

EXP-T

GR @6000

66.415

71.038

27.850

45.488

57.368

76.440

77.954

Standard Deviation

3.526

1.635

2.500

2.388

3.947

2.861

0.483

 

Table 2:  Three-body wear in microns through 200,000 cycles of abrasion

Sample

FS DEB

TEC

PM

EX

EXP-DEB

Micron wear (200,000 cycles)

2.654

7.629

7.228

7.498

2.687

Standard deviation

0.259

0.340

0.452

0.460

0.204

Conclusion:

ANOVA analysis showed that at p<0.05, both of the experimental nanocomposite materials EXP-DEB and EXP-T had statistically higher gloss retention after toothbrushing than any of the other materials tested.  Also, all four of the nanocomposite materials (FST, FS DEB, EXP-DEB and EXP-T) had at p<0.05 higher gloss retention than any of the microhybrid materials tested.  Finally, FS DEB and EXP DEB had statistically better (p<0.05) 3-body wear resistance than any of the other materials tested.


Continental European, Israeli, Scandinavian Divisions Meeting
2009 Continental European, Israeli, Scandinavian Divisions Meeting (Munich, Germany)
Munich Germany
2009
7
Scientific Groups
  • Mitra, S. B.  ( 3M ESPE Dental Products, Saint Paul, MN, USA )
  • Craig, B. D.  ( 3M ESPE Dental Products, Saint Paul, MN, USA )
  • Kobussen, Gregory A.  ( 3M ESPE Dental Products, Saint Paul, MN, USA )
  • Lechuga, Hyacinth L.  ( 3M ESPE Dental Products, Saint Paul, MN, USA )
  • Atkinson, Matthew R.  ( 3M Corporate Research Analytical Laboratory, Saint Paul, MN, USA )
  • Oral Session
    Dental Materials 3
    09/09/2009