Effect of sandblasting and type of cement on the bond strength of molar bands on stainless steel crowns

摘要

Purposes: The purposes of this study were to: (1) compare the bond strength of molar bands cemented to stainless steel crowns (SSCs) using glass ionomer cement (GIC), resin-modified glass ionomer cement (RMGIC), or polycarboxylate cement (PXC); and (2) assess the influence of sandblasting molar bands on the mean bond strength between the band and the SSC. Methods: Sixty SSCs and 60 molar bands were used. The inner surfaces of 30 molar bands were roughened by sandblasting prior to cementation. The bond strength was measured after dislodging the SSC using a push-out test. Results: In the nonsandblasted group, a significant difference was observed between PXC and RMGIC (P>.04). In the sandblasted group, a significant difference was observed between PXC and RMGIC (P>.02), while there was only a marginal difference between GIC and RMGIC (P>.05). The sandblasted group exhibited superior bond strength overall. However, the only significant improvement was observed for GIC (P>.03). Conclusions: PXC showed the highest bond strength of molar bands to SSCs, while RMGIC showed the lowest. Sandblasting the inner surface of bands enhanced the bond strength of different cements.