The Gingival Effects of Dental Airpolishing as Evaluated by Scanning Electron Microscopy

Kontturi-Närhi, Vuokko; Markkanen, Seppo; Markkanen, Helena

doi:10.1902/jop.1989.60.1.19

Cited by 36 publications

(75 citation statements)

References 4 publications

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“…5,6 Previous studies examining root surface damage after air polishing with NaHCO 3 powder for various periods of time have reported defects of 484 ± 196 μm after 5 s, 11 163.1 ± 71.1 μm after 20 s, 13 and 636.6 ± 103.6 μm after 30 s. 14 These reports have motivated the development of a polishing powder whose principal ingredient is glycine, which infi ltrates tissue less than NaHCO 3 . Glycine is a highly water-soluble amino acid with a lower Morse hardness index than NaHCO 3 .…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have reported the effects of air polishing on mature enamel, 4 cementum, the dentin of denuded root surfaces, and gingival surfaces. 5,6 Although NaHCO 3 powder has previously been used in air polishing, concerns about gingival erosion have led to the recent development of powders whose main ingredient is glycine. Glycine is a highly water-soluble amino acid with a Morse hardness lower than that of NaHCO 3 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of particle diameter on air polishing of dentin surfaces

et al. 2010

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We examined the abrasiveness of glycine powders with particle diameters of 63 and 100 mum by measuring the depth and volume of defects produced during air polishing of human dentin. A total of 36 extracted human teeth were embedded in acrylic resin. The resin blocks were polished until the dentin surfaces were exposed. The nozzle of an air polisher was mounted 4 mm from the dentin surface, and the dentin surface was treated for 5 s at one of two angles of incidence (45 degrees or 90 degrees). Three materials were used in the polishing process: NaHCO(3) powder with a mean particle diameter of 100 microm (Handy Jet Powder), glycine powder with a mean particle diameter of 63 microm (Handy Jet Powder PMTC), and glycine powder with a mean particle diameter of 100 microm (Handy Jet Powder Recall). The defect depth at both angles was significantly deeper after treatment with Handy Jet Powder or Handy Jet Powder PMTC. The defect volume was the greatest with Handy Jet Powder, followed by Handy Jet Powder PMTC, and Handy Jet Powder Recall. The larger diameter glycine powder resulted in less damage to the dentin.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of particle diameter on air polishing of dentin surfaces

et al. 2010

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“…Many previous studies have reported the effects of NaHCO 3 air-polishing powders on mature enamel [10], cementum and the dentin of exposed root surfaces [11], as well as the gingiva [12,13]. In addition, dentin surfaces were sprayed by NaHCO 3 powders, the degree of damage increased as the distance of the nozzle decreased [14].…”

Section: Introductionmentioning

confidence: 99%

The characterization of dentin defects produced by air polishing

et al. 2011

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The objective of this study is to characterize the defects in the dentin surface after air polishing for three types of polishing powders and five different nozzle distances. Human teeth were embedded in acrylic resin and then polished until the dentin surface became exposed. The nozzle of the polisher was fixed at a specified distance (2, 3, 4, 5, or 6 mm) and orientation (45°) with respect to the dentin surface. The three powders were CLASSIC (NaHCO(3), 65 μm diameter), PERIO (glycine, 25 μm diameter), and SOFT (glycine, 65 μm diameter). With respect to nozzle distance, we find a significant difference in the mean defect depth only at 6 mm. The spray distance of 6 mm produced the shallowest defect depths. This variable had no effect on the defect volume. SOFT powder had significantly less depths and volumes of defects than the other two powders. The contact angle of the dentin increased significantly in all polishing tests, compared to an unpolished dentin surface (control). We find that spray distance of 6 mm from the nozzle of the polisher and orienting on 45° angle produced less dentin surface defects than any other distance in all powder systems used. At this distance, SOFT powder produced statistically significant smaller depth and volume defects than the other two powder groups.

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“…To examine the fracture surfaces of the test specimens, SEM replicas of the fracture surface were made (Kontturi-Narhi, Markkanen &• Markkanen, 1989; after the loading test, the gold alloy surface was duplicated using a low viscosity silicone-based material^. To prepare positive replicas, epoxy resin* was cast in the impressions.…”

Section: Methodsmentioning

confidence: 99%

Bonding of hybrid composite resin to the surface of gold–alloy used in porcelain‐fused‐to‐metal restorations

Vallittu

1997

J of Oral Rehabilitation

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The aim of this study was to determine the bond strength of hybrid composite resin to the surface of a gold alloy used in porcelain-fused-tometal restorations. The surface of the gold alloy was either ground with a sintered diamond burr, sandblasted with AI2O4 or ground with a siliconcarbide stone. The com^posite resin was bonded to the surface of the gold alloy with or without a commercial silane primer. Bond strength was tested with a three-point loading test, and the elemental composition of the surface of the gold alloy after various mechanical treatments was analysed hy SEM/EDS method. Replicas of the fracture surface of the test specimens were examined by SEM to determine whether or not composite resin particles left on the surface had adhered after the loading test. The results showed that mechanical treatment of the surface of the gold alloy affects the hond strength of the composite resin (P< 0-001) hut that silane treatment of the surface did not affect the bond strength (P = 0-217). SEM/EDS analysis showed evenly distributed aluminium on the surface of sandblasted gold alloy and silicon on the surface that had been ground with the silicon-carbide stone. This study suggests that sandblasting of the gold alloy surface considerably enhances the strength of its bond to hybrid composite resin.

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The Gingival Effects of Dental Airpolishing as Evaluated by Scanning Electron Microscopy

Cited by 36 publications

References 4 publications

Effect of particle diameter on air polishing of dentin surfaces

Effect of particle diameter on air polishing of dentin surfaces

The characterization of dentin defects produced by air polishing

Bonding of hybrid composite resin to the surface of gold–alloy used in porcelain‐fused‐to‐metal restorations

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