Wear behavior between zirconia and titanium as an antagonist on fixed dental prostheses

Abstract

The aim of this in vitro study was to investigate the wear behavior of the abrader when tetragonal zirconia polycrystal (TZP), cp-titanium (CpTi) and Ti-6Al-4V alloy (TiAlV) were used for the antagonist on fixed dental prostheses. Both hemisphere abrader specimen and flat substrate specimens were prepared using TZP, CpTi and TiAlV. Two-body wear tests were performed in distilled water, and wear volume of the abrader specimen was measured to evaluate the wear behavior. In addition, a scanning microscopic observation and an electron probe micro-analysis were performed to elucidate the underlying mechanism of the wear. The wear volume of CpTi and TiAlV abrader specimen showed approximately twenty times larger than that of TZP abrader specimen against all substrate specimens. This is due to the differences in hardness between the ultra-hardness of TZP and comparatively low hardness of CpTi and TiAlV. The wear volume of CpTi and TiAlV abrader specimen against TZP substrate was significantly smaller than CpTi and TiAlV substrates despite the hardness of TZP was much larger than those of CpTi and TiAlV. This phenomenon may be based on the adhesive wear mechanism. Elements of Ti, Al and V originating in the TiAlV substrate were detected adhering to the abrader CpTi specimen. These results suggest that fixed dental prostheses of CpTi and TiAlV are susceptible to wear against not only TZP but also CpTi and TiAlV in contrast to TZP fixed dental prostheses.

Wear performance of bovine tooth enamel against translucent tetragonal zirconia polycrystals after different surface treatments

“…BTE is believed to be most suitable for in vitro wear testing by using substrate specimens with a flat surface for standardizing the antagonistic conditions and thus obtaining accurate quantification of wear resuluts 18) . In this study, a two-body wear test was used to evaluate abrader and substrate wear behavior consistent with previous studies 19,20) . They were able to evaluate the wear behavior of various substrate specimens as well as of abrader specimens.…”

“…Adhesive wear is strongly influenced by the coefficient of friction between the materials 20) . However, no differences in the coefficients of friction were shown in this study, which was 0.19 and 0.17 for TZP/BTE and POR/BTE, respectively.…”

“…Grain size is an important parameter because it determines the surface topography and tribological behavior of the materials. The fine grain size of translucent TZP might cause smooth surfaces after polishing, leading to its lower susceptibility to antagonist wear behavior 20) . In addition, the fact that the wear of the TZP abrader was almost zero against the BTE substrate might indicate that the smooth surfaces of the TZP abrader have been maintained during wear testing.…”

Metal stain on monolithic zirconia restoration: A case report

“…Kanbara et al17 previously reported a similar surface stain on zirconia, caused by wear between a titanium alloy and a highly polished zirconia (Ra < 0.1 µm). Although their study dealt with a different alloy, their finding implies that the black metal stain found in the present case report was unrelated to the surface roughness of monolithic zirconia restoration.…”

Effects of repetitive insertion/removal cycles and simulated occlusal loads on retention of denture retainers

“…The results of the color chart suggested that clasp deformation increased with loading cycles and that differences in wear behavior existed between the buccal and lingual clasp arms. Several papers have reported the influence of clasp shape on permanent deformation 18) , as well as wear behavior on the inner surface of the clasp and abutment surface 4,7,[19][20][21] . Tanaka et al investigated wear behavior of crowns and clasps made of silverpalladium-copper alloy, and then reported that adhesive wear occurs as a result of repetitive insertion/removal of a clasp from the abutment tooth 4) .…”