Influence of Shearing Action of Food on Contact Stress and Subsequent Wear of Stress-bearing Composites

Abstract

The influence of sliding action of the antagonist on occlusal three-body wear of composites and an amalgam was investigated in vitro by gradual change in the distance between the opposing substrates. When the distance was decreased from 10 μm to approximately 3 μm, wear increased significantly by a factor of two to three and was exclusively of erosive nature. At a slurry-film thickness of approximately 1 μm, direct contacts between the antagonist and protruding composite filler particles started to occur. This consequently slowed the erosive wear. Ultimately, direct contact phenomena predominated, decreasing the wear rate of the various materials to different degrees. Loss of material due to subsurface fatigue could not be demonstrated with a contact pressure of 45 MPa at which the experiments were performed. From this study, it can be concluded that minor alterations of the food-film thickness at the contact areas result in considerable changes in wear rates and wear-rate ranking of composite materials, which may partly explain inconsistencies among clinical trials.

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References

Bailey WF , Rice SL ( 1981). Comparative sliding-wear behavior of a dental amalgam and a composite restorative as a function of contact stress. J Dent Res 60:731-732.

Bloem TJ , McDowell GC , Lang BR , Powers JM (1988). In vivo wear. Part II: Wear and abrasion of composite restorative materials. J Prosthet Dent 60:242-249.

De Gee AJ , Pallav P. , Davidson CL (1986). Effect of abrasion medium on wear of stress-bearing composites, and amalgam in vitro. J Dent Res 65:654-658.

De Gee AJ , Pallav P. , Werner A. , Davidson CL (1990). Annealing as a mechanism of increasing wear resistance of composites. Dent Mater 6:266-270.

Finger W. , Thiemann J. (1987). Correlation between in vitro and in vivo wear of posterior restorative materials. Dent Mater 3 :280-286.

Hertz H. (1881). Über die berührung fester elastischer korper. J Reine Angew Math 92:155-171.

Horsted P. , Borup J. (1984). In vivo abrasion of Profile and Adaptic composite resins. Scand J Dent Res 92:249-252.

Hughes WF , Brighton JA (1967). Theory and problems of fluid dynamics. New York: McGraw-Hill.

Juvinall RC , Marshek KM (1991). Fundamentals of machine component design. 2nd ed. New York: Wiley & Sons.

10.

Lambrechts P. , Braem M. , Vanherle G. (1985). Accomplishments and expectations with posterior composite resins. In: Vanherle G, Smith DC, editors. Proceedings, International Symposium, Posterior Composite Resin Dental Restorative Materials . Utrecht (The Netherlands): Szulc Press, 521-528.

11.

Lambrechts P. , Braem M. , Vanherle G. (1987). Evaluation of clinical performance for posterior composite resins and dentin adhesives. J Oper Dent 12:53-78.

12.

Leinfelder KF , Mirshahidi M. , Cury C. , O'Neal W. (1991). An in vitro wear device for determining wear of posterior composites (abstract). J Dent Res 70:345.

13.

McKinney JE , Wu W. (1982). Relationship between subsurface damage and wear of dental restorative composites. J Dent Res 61:1083-1088.

14.

Meier C. , Lutz F. ( 1980). Vergleichende verschleiss festigkeitsmessungen in vivo zwischen amalgam und komposit. Dtsch Zahnärtzl Z 35:489-492.

15.

Pallav P. , Davidson CL , De Gee AJ (1988). Wear rates of composites, an amalgam and enamel under stress-bearing conditions. J Prosthet Dent 59:426-429.

16.

Reynolds 0 (1886). On the theory of lubrication and its application to Mr. Beauchamp Towers's experiments, including an experimental determination of the viscosity of olive oil. Phil Trans R Soc Lond 177:157-234.

17.

Rice SL , Bailey WF , Roto M. , Wayne SF (1984a). Wear behavior of a composite restorative and various styli in sliding contact. J Dent Res 63:932-935.

18.

Rice SL , Bailey WF , Wayne SF , Burns JA (1984b). Comparative in uitro sliding-wear study of conventional, microfilled, and light-cured composite restoratives. J Dent Res 63:1173-1175.

19.

Truong VT , Tyas MJ ( 1988). Prediction of in vivo wear in posterior composite resins: a fracture mechanics approach. Dent Mater 4:318-327.