Effects of air polishing on the resin composite–dentin interface

Abstract

The aim of this study was to examine defect depths and volumes at the resin composite-dentin (R/D) interface after air polishing with different particles and spray angles. Samples were 54 dentin specimens that were formed in saucer-shaped cavities filled with resin composite. Each specimen was air polished with either sodium bicarbonate (NaHCO3) or one of two glycine (Gly) powders. The air polisher was set at angles of 90° to the interface and at 45° to the interface from both the dentin and resin composite sides. Air polishing with Gly powder produced defects with less depth and volume than NaHCO3 powder (p < 0.05). Air polishing with a spray angle of 45° to the interface from the resin composite side produced fewer defects (p < 0.05) than polishing from the dentin side. Air polishing to the R/D interface from the resin composite side produced fewer defects to the interface because the hardness of the resin composite was higher than that of dentin.

Influence of dentin pretreatment on bond strength of universal adhesives

“…Air-power polishers are available with a broad range of powders. When selecting a powder, two aspects have to be weighed: the effectiveness desired from the cleaning, and surface abrasion [24]. A powder characterized by greater abrasiveness removes both undesirable and desirable tissues.…”

Effect of a temporary sealing material on the bond strength of CAD/CAM inlay restorations with resin-coating technique

“…Glycine powders have a lower hardness than sodium bicarbonate powders, and cause less damage to the dentin surface and the gingival epithelium [22][23][24][25] . In addition, glycine powders produced smaller changes in dentin surface parameters than sodium bicarbonate powders 23,26) . Therefore, air-flow powder SOFT was used to remove the temporary sealing material.…”

Evaluation of the bond strength between aged composite cores and luting agent

“…Acids with different concentrations and types have been used in studies and various result have been obtained. 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 Surface treatment with acid alone did not produce remarkable changes in the superficial texture of the composite compared with that of an untreated sample; it seemed to only have a cleaning effect. 29 In the present study, acid etching of the surface increased the bond strength of the aged composite.…”

“…Shimizu et al 36 reported that air polishing causes increasing the surface roughness of the composite. In a previous study, Rinaudo et al 37 concluded that air polishing cannot remove the smear layer; therefore, the bond strength of the restorations decreases.…”