Prethodno priopćenje
A Method for Testing Abrasive Wear of Aesthetic Prosthetic Materials
Ketij Mehulić
Zdravko Schauperl
Ivana Čvrljak-Tomić
Tomislav Badel
Sažetak
Friction and wear occur due to the contact of surfaces which are more or less rough. During abrasive wear the extrusion of material occurs, caused by hard particles which apply pressure toward the surface or slide along it (three-body abrasive wear) or by hard protrusions (two-body abrasive wear). Because of demands to provide a satisfactory aesthetic mastication surface the clinician is faced with the problem of the choice of material for veneering.
The article describes a method for testing abrasive wear of pairs of tooth-prosthetic material for veneering. In order to test the method two different prosthetic veneering materials were tested (polymer material SR Chromasit, Ivoclar and Clay ceramic, Sign-Ivoclar) on a modified Taber abraser, in dry conditions. Significant differences were determined in the wear scars on specimens of the tested materials. The method enables the testing of specimens of different materials mutually or in a pair with a natural tooth, under different loading and with or without a third body (food or artificial saliva), which in clinical practice represents valuable data during the choice of the type of construction and veneering material.
Ključne riječi
abrasive wear; polymers; dental ceramics
Hrčak ID:
670
URI
Datum izdavanja:
15.6.2005.
Posjeta: 2.813 *