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Effect on enamel shear bond strength of adding microsilver and nanosilver particles to the primer of an orthodontic adhesive.

Blöcher S, Frankenberger R, Hellak A, Schauseil M, Roggendorf MJ, Korbmacher-Steiner HM - BMC Oral Health (2015)

Bottom Line: No significant differences in SBS (control: 16.59 ± 6.82 MPa; group 2: 20.6 ± 4.19 MPa; group 3: 16.98 ± 4.84 MPa; group 4: 17.15 ± 5.92 MPa; group 5: 20.09 ± 3.35 MPa; group 6: 16.44 ± 4.51 MPa; p > 0.665) and ARI scores (p = 0.901) were found between the control group and any experimental group.Addition of small concentrations of microsilver or nanosilver particles affects neither SBS nor ARI scores.Further studies are needed to investigate the anti-caries potential and clinical performance of conventional orthodontic primer with incorporated nanosilver or microsilver particles.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, University Hospital Giessen and Marburg, Campus Marburg, Georg-Voigt-Strasse 3, Marburg, 35039, Germany. sonja.bloecher@staff.uni-marburg.de.

ABSTRACT

Background: The objective of this study was to determine whether the addition of microsilver or nanosilver particles to an orthodontic primer affects shear bond strength (SBS) and bracket/adhesive failure.

Methods: Bovine incisors were randomly divided into six groups with 16 specimens in each: In group 1 (control), brackets were bonded with Transbond™ XT primer. In the experimental groups, microsilver (groups 2 and 3) and nanosilver (groups 4-6) particles of different sizes were added to Transbond XT primer and light cured for 15 seconds [group 2: 0.1% (w/w) microsilver particle size 3.5-18 μm; group 3: 0.3% (w/w) microsilver particle size 3.5-18 μm; group 4: 0.11% (w/w) nanosilver particle size 12.6-18.5 nm; group 5: 0.18% (w/w) nanosilver particle size 12.6-18.5 nm; group 6: 0.33% (w/w) nanosilver particle size 12.6-18.5 nm]. Thereafter, brackets were bonded by light curing the adhesive for 20 seconds. After 24 hours of storage in distilled water at 37 °C, SBS was measured with a Zwicki 1120 testing machine. The adhesive remnant index and the prevalence of silver spots on the specimen surface were determined under 10× magnification. Statistical two-way analysis of variance was performed to compare SBS, and a chi-square test was used to compare ARI scores and the prevalence of silver spots.

Results: No significant differences in SBS (control: 16.59 ± 6.82 MPa; group 2: 20.6 ± 4.19 MPa; group 3: 16.98 ± 4.84 MPa; group 4: 17.15 ± 5.92 MPa; group 5: 20.09 ± 3.35 MPa; group 6: 16.44 ± 4.51 MPa; p > 0.665) and ARI scores (p = 0.901) were found between the control group and any experimental group. Only experimental groups with nanosilver particles revealed statistically more silver spots on the remaining adhesive.

Conclusions: Addition of small concentrations of microsilver or nanosilver particles affects neither SBS nor ARI scores. Addition of nanosilver particles results in silver spots in the remaining primer visible under 10× magnification. Further studies are needed to investigate the anti-caries potential and clinical performance of conventional orthodontic primer with incorporated nanosilver or microsilver particles.

No MeSH data available.


Related in: MedlinePlus

Representative microscopic and SEM images of median ARI scores. A-F: 10× magnification; arrows mark detected silver spots. a-f SEM counterparts (45×) of the same sample. A and a, primer (Transbond XT); B and b, primer and 0.1% (w/w) microsilver; C and c primer and 0.3% (w/w) microsilver; D and d, primer and 0.11% (w/w) nanosilver; E and e, primer and 0.18% (w/w) nanosilver; F and f, primer and 0.33% (w/w) nanosilver.
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Fig3: Representative microscopic and SEM images of median ARI scores. A-F: 10× magnification; arrows mark detected silver spots. a-f SEM counterparts (45×) of the same sample. A and a, primer (Transbond XT); B and b, primer and 0.1% (w/w) microsilver; C and c primer and 0.3% (w/w) microsilver; D and d, primer and 0.11% (w/w) nanosilver; E and e, primer and 0.18% (w/w) nanosilver; F and f, primer and 0.33% (w/w) nanosilver.

Mentions: By visual eye check no silver spots were visible on any tooth. Under 10× stereomicroscopic magnification small silver spots were detected on the resting primer/adhesive on the tooth surface in all experimental groups (Table 4, Figure 3).Table 4


Effect on enamel shear bond strength of adding microsilver and nanosilver particles to the primer of an orthodontic adhesive.

Blöcher S, Frankenberger R, Hellak A, Schauseil M, Roggendorf MJ, Korbmacher-Steiner HM - BMC Oral Health (2015)

Representative microscopic and SEM images of median ARI scores. A-F: 10× magnification; arrows mark detected silver spots. a-f SEM counterparts (45×) of the same sample. A and a, primer (Transbond XT); B and b, primer and 0.1% (w/w) microsilver; C and c primer and 0.3% (w/w) microsilver; D and d, primer and 0.11% (w/w) nanosilver; E and e, primer and 0.18% (w/w) nanosilver; F and f, primer and 0.33% (w/w) nanosilver.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4374300&req=5

Fig3: Representative microscopic and SEM images of median ARI scores. A-F: 10× magnification; arrows mark detected silver spots. a-f SEM counterparts (45×) of the same sample. A and a, primer (Transbond XT); B and b, primer and 0.1% (w/w) microsilver; C and c primer and 0.3% (w/w) microsilver; D and d, primer and 0.11% (w/w) nanosilver; E and e, primer and 0.18% (w/w) nanosilver; F and f, primer and 0.33% (w/w) nanosilver.
Mentions: By visual eye check no silver spots were visible on any tooth. Under 10× stereomicroscopic magnification small silver spots were detected on the resting primer/adhesive on the tooth surface in all experimental groups (Table 4, Figure 3).Table 4

Bottom Line: No significant differences in SBS (control: 16.59 ± 6.82 MPa; group 2: 20.6 ± 4.19 MPa; group 3: 16.98 ± 4.84 MPa; group 4: 17.15 ± 5.92 MPa; group 5: 20.09 ± 3.35 MPa; group 6: 16.44 ± 4.51 MPa; p > 0.665) and ARI scores (p = 0.901) were found between the control group and any experimental group.Addition of small concentrations of microsilver or nanosilver particles affects neither SBS nor ARI scores.Further studies are needed to investigate the anti-caries potential and clinical performance of conventional orthodontic primer with incorporated nanosilver or microsilver particles.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, University Hospital Giessen and Marburg, Campus Marburg, Georg-Voigt-Strasse 3, Marburg, 35039, Germany. sonja.bloecher@staff.uni-marburg.de.

ABSTRACT

Background: The objective of this study was to determine whether the addition of microsilver or nanosilver particles to an orthodontic primer affects shear bond strength (SBS) and bracket/adhesive failure.

Methods: Bovine incisors were randomly divided into six groups with 16 specimens in each: In group 1 (control), brackets were bonded with Transbond™ XT primer. In the experimental groups, microsilver (groups 2 and 3) and nanosilver (groups 4-6) particles of different sizes were added to Transbond XT primer and light cured for 15 seconds [group 2: 0.1% (w/w) microsilver particle size 3.5-18 μm; group 3: 0.3% (w/w) microsilver particle size 3.5-18 μm; group 4: 0.11% (w/w) nanosilver particle size 12.6-18.5 nm; group 5: 0.18% (w/w) nanosilver particle size 12.6-18.5 nm; group 6: 0.33% (w/w) nanosilver particle size 12.6-18.5 nm]. Thereafter, brackets were bonded by light curing the adhesive for 20 seconds. After 24 hours of storage in distilled water at 37 °C, SBS was measured with a Zwicki 1120 testing machine. The adhesive remnant index and the prevalence of silver spots on the specimen surface were determined under 10× magnification. Statistical two-way analysis of variance was performed to compare SBS, and a chi-square test was used to compare ARI scores and the prevalence of silver spots.

Results: No significant differences in SBS (control: 16.59 ± 6.82 MPa; group 2: 20.6 ± 4.19 MPa; group 3: 16.98 ± 4.84 MPa; group 4: 17.15 ± 5.92 MPa; group 5: 20.09 ± 3.35 MPa; group 6: 16.44 ± 4.51 MPa; p > 0.665) and ARI scores (p = 0.901) were found between the control group and any experimental group. Only experimental groups with nanosilver particles revealed statistically more silver spots on the remaining adhesive.

Conclusions: Addition of small concentrations of microsilver or nanosilver particles affects neither SBS nor ARI scores. Addition of nanosilver particles results in silver spots in the remaining primer visible under 10× magnification. Further studies are needed to investigate the anti-caries potential and clinical performance of conventional orthodontic primer with incorporated nanosilver or microsilver particles.

No MeSH data available.


Related in: MedlinePlus