Wear of composite resin in vitro: a testing machine with rubber plate. Preliminary results

Abstract

A new machine was developed to study the wear of dental filling materials in vitro. Four products: amalgam, Adaptic, Clearfil and acrylic resin were tested. Wear was measured quantitatively by weighing the specimen, and the wear pattern was studied qualitatively with a scanning electron microscope (SEM). A comparison was made with materials that were placed in the mouth for a prolonged period. It was found that the in vitro wear pattern was comparable to that found in vivo.

Wear of three dental composites under different testing conditions

“…It will also allow a more controlled and convenient way for investigating and revealing the basic characteristics behind in vivo wear mechanisms. Indeed, many researchers have already contributed a great deal of work in this area (Finger & Thiemann, 1987; Hengchang et al ., 1990; Suzuki & Leinfelder, 1994; Kawai & Leinfelder, 1995). During the last 20 years, many different wear testing machines have been constructed for dental materials study (Harrison & Lewis, 1975; Harrington et al ., 1982; Leinfelder, Beaudreau & Mazer, 1989; Delong & Douglas, 1991; De Gee & Pallav, 1994; Wassell, McCabe & Walls, 1994; Condon & Ferracane, 1996; Hu et al ., 1999).…”