The Influence of Admixing Microfiller to Small-particle Composite Resin on Wear,Tensile Strength,Hardness,and Surface Roughness

Abstract

A series of photo-initiated composite resins, with a Bis-GMA-TEGDMA resin matrix, was investigated in vitro for occlusal wear, surface roughness, diametral tensile strength, and hardness. The materials contained mixtures of ground quartz (macro filler, 3 μm) and colloidal silica (micro filler, 0. 04μm), with total filler being constant at 68.5% by volume. The study was conducted to determine the influence of an increasing ratio of micro to macrofiller in the mixtures. When the macrofiller was gradually replaced by 3, 5, 7.5, 10, 15, and 20 vol% of microfiller, wear resistance increased substantially, ultimately to a constant level. Any influence on surface roughness or tensile strength and hardness could not be demonstrated.

Get full access to this article

View all access options for this article.

References

Braem, M. ; Van Doren, V.E. ; Lambrechts, P. ; and Vanherle, G. (1987): Determination of Young's Modulus of Dental Composites: a Phenomenological Model, J Marer Sci 22:2037-2042.

De Gee, A.J. ; Pallav, P. ; and Davidson, C.L. (1986): Effect of Abrasion Medium on Wear of Stress-bearing Composites and Amalgam in vitro, J Dent Res 65:654-658.

De Gee, A.J. ; Ten Harkel, H.C. ; and Davidson, C.L. (1984): Abrasion of Microfilled bis-GMA/TEGDMA Resin in Relation to its Filler Content, J Dent Res 63:532, Abstr. No. 17.

De Gee, A.J. ; Ten Harkel-Hagenaar, H.C. ; and Davidson, C.L. (1985): Structural and Physical Factors Affecting the Brush Wear of Dental Composites, J Dent 13:60-70.

Finger, W. and Thiemann, J. (1987): Correlation between in vitro and in vivo Wear of Posterior Restorative Materials, Dent Mater 3:280-286.

Harrison, A. and Draughn, R.A. (1976): Abrasive Wear, Tensile Strength, and Hardness of Dental Composite Resins-Is there a Relationship ?, J Prosthet Dent 36 :395-398.

Jørgensen, K.D. (1980): Restorative Resins: Abrasion vs. Mechanical Properties , Scand J Dent Res 88:557-568.

Leidal, T.I. ; Solem, H. ; and Rykke, M. (1985): A Clinical and Scanning Electron Microscopic Study of a New Restorative Material for Use in Posterior Teeth, Acta Odontol Scand 43:1-8.

Leitao, J. and Hegdahl, T. (1981): On the Measuring of Roughness, Acta Odontol Scand 39:379-384.

10.

Li, Y. ; Swartz, M.L. ; Phillips, R.W. ; Moore, B.K. ; and Roberts, T.A. (1985): Effect of Filler Content and Size on Properties of Composites, J Dent Res 64:1396-1401.

11.

Lutz, F. ; Imfeld, T. ; and Phillips, R.W. (1985): P-10-Its Potential as a Posterior Composite, Dent Mater 1:61-65.

12.

Pallav, P. ; Davidson, C.L. ; and De Gee, A.J. (1988): Wear Rates of Composites, an Amalgam, and Enamel under Stress-bearing Conditions, J Prosthet Dent 59:426-429.

13.

St. Germain, H. ; Swartz, M.L. ; Phillips, R.W. ; Moore, B.K. ; and Roberts, T.A. (1985): Properties of Microfilled Composite Resins as Influenced by Filler Content, J Dent Res 64:155-160.

14.

Van Groeningen, G. ; Jongebloed, W. ; and Arends, J. (1985): Composite Resins after 1 1/2 Years of in vivo Abrasion. An SEM Imestigation, Quint Int 4:253-258.