Elementanalytische und quantitativ-morphometrische Bestimmung von Kunststoffresten und Schmelzausrissen nach der Abnahme von Metallbrackets

Ruppenthal, T; Stratmann, U.; Sergl, H. G.; Czech, D.

doi:10.1007/bf02164644

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Ebenso kann es bei Bracketentfernung, Kunststoffrestentfernung vom Zahn und wiederholtem Bracketbefestigen zu Schmelzschäden kommen [3,16,17,44]. Ebenso kann es bei Bracketentfernung, Kunststoffrestentfernung vom Zahn und wiederholtem Bracketbefestigen zu Schmelzschäden kommen [3,16,17,44].…”

Section: Methodsunclassified

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Haftfestigkeit verschiedener Fluorid freisetzender Bracketadhäsivsysteme. Experimentelle Untersuchung

Graf¹,

Jacobi

2000

Journal of Orofacial Orthopedics / Fortschritte der Kieferortho

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The aim of the study was to compare the shear bond strength of a fluoride-releasing composite resin adhesive (Light Bond, Reliance) and a light-cured resin-reinforced glass ionomer cement (Fuji Ortho LC, GC America) bonded to extracted teeth under different enamel surface conditions. Forty human premolars were divided at random into 4 groups of 10 specimens. Stainless steel brackets were attached to the enamel surface by 1 of the 4 protocols: 1. Fuji Ortho LC, moist non-etched enamel; 2. Fuji Ortho LC, moist etched (37% H3PO4); 3. Light Bond, dry etched (37% H3PO4); 4. Light Bond, dry etched (Etch & Prime 3.0, Degussa). The teeth were stored in deionized water at 37 degrees C for 48 hours. Shear bond strengths was determined at a crosshead speed of 1 mm/min. The residual adhesive on the enamel surface was evaluated with the modified Adhesive Remnant Index (ARI). Analysis of variance (ANOVA) and Duncan's test were used to compare the 4 groups. Significance was predetermined at p = 0.05. Significant inter-group differences were found (p < 0.0001). The mean SBS (and SD), in MPa were: Group 1: 15.9 (4.7); Group 2: 20.3 (2.5); Group 3: 16.7 (2.6); Group 4: 11.7 (2.5). Glass ionomer cement without etching and composite with Etch & Prime showed adhesive failures at the enamel and good enamel integrity after debonding. The other specimens showed mixed or adhesive fractures at the bracket failure sites. Glass ionomer used on wet tooth surfaces without etching shows a clinically acceptable bond strength with clean separation from the enamel after debonding.

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Section: Methodsunclassified

“…Enamel can also be lost during bracket debonding, through the clean-up of residual material from the tooth, and during rebonding procedures [3,16,17,44]. Enamel can also be lost during bracket debonding, through the clean-up of residual material from the tooth, and during rebonding procedures [3,16,17,44].…”

mentioning

confidence: 99%

Haftfestigkeit verschiedener Fluorid freisetzender Bracketadhäsivsysteme. Experimentelle Untersuchung

Graf¹,

Jacobi

2000

Journal of Orofacial Orthopedics / Fortschritte der Kieferortho

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“…The process of debonding results not only in adhesive remnants, but also causes irreversible enamel loss [1,11,15,17]. The failure of the interface between adhesive and enamel removes a layer of enamel.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional quantitative analysis of adhesive remnants and enamel loss resulting from debonding orthodontic molar tubes

Janiszewska‐Olszowska

Tandecka

Szatkiewicz

et al. 2014

Head Face Med

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AimsPresenting a new method for direct, quantitative analysis of enamel surface. Measurement of adhesive remnants and enamel loss resulting from debonding molar tubes.Material and methodsBuccal surfaces of fifteen extracted human molars were directly scanned with an optic blue-light 3D scanner to the nearest 2 μm. After 20 s etching molar tubes were bonded and after 24 h storing in 0.9% saline - debonded. Then 3D scanning was repeated. Superimposition and comparison were proceeded and shape alterations of the entire objects were analyzed using specialized computer software. Residual adhesive heights as well as enamel loss depths have been obtained for the entire buccal surfaces. Residual adhesive volume and enamel loss volume have been calculated for every tooth.ResultsThe maximum height of adhesive remaining on enamel surface was 0.76 mm and the volume on particular teeth ranged from 0.047 mm3 to 4.16 mm3. The median adhesive remnant volume was 0.988 mm3. Mean depths of enamel loss for particular teeth ranged from 0.0076 mm to 0.0416 mm. Highest maximum depth of enamel loss was 0.207 mm. Median volume of enamel loss was 0.104 mm3 and maximum volume was 1.484 mm3.ConclusionsBlue-light 3D scanning is able to provide direct precise scans of the enamel surface, which can be superimposed in order to calculate shape alterations. Debonding molar tubes leaves a certain amount of adhesive remnants on the enamel, however the interface fracture pattern varies for particular teeth and areas of enamel loss are present as well.

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Bond strength of a fluoride-releasing bracket adhesive

Graf

Breier²,

Huck³

et al. 1999

J Orofac Orthop/Fortschr Kieferorthop

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The aim of the study was to examine a new fluoride-releasing light-cured filling composite for its bonding and debonding qualities when used as a bracket adhesive. The material investigated was a hybrid composite containing a chemically modified fluoride apatite, which is claimed to provide the enamel with phosphate, calcium, and fluoride ions in the presence of an acid pH, recharging its resources of these ions through fluoride-containing toothpastes used in daily oral hygiene. Concurrently suitability as an enamel conditioner was tested in a new self-etching primer, which does not require water rinsing but is gently air dried instead. For comparison a conventional light-cure single-component adhesive was used together with 37% orthophosphoric acid. After application of the respective conditioners, mesh-backed metal brackets were bonded to 20 human premolars in each of the 2 adhesive groups and subjected to a shear test. Bond failure location was evaluated using the Adhesive Remnant Index (ARI). Average bond strength of the experimental bracket adhesive and the conventional etchant was 8.96 MPa. Conditioning with the self-etching primer led to a decrease of mean shear bond strength values to 6.55 MPa. Highest bond strength was determined in the control group (12.19 MPa). The bond strength results obtained in the shear test recommend the new material as a bracket adhesive to be used with orthophosphoric acid for etching.

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Elementanalytische und quantitativ-morphometrische Bestimmung von Kunststoffresten und Schmelzausrissen nach der Abnahme von Metallbrackets

Cited by 4 publications

References 15 publications

Haftfestigkeit verschiedener Fluorid freisetzender Bracketadhäsivsysteme. Experimentelle Untersuchung

Haftfestigkeit verschiedener Fluorid freisetzender Bracketadhäsivsysteme. Experimentelle Untersuchung

Three-dimensional quantitative analysis of adhesive remnants and enamel loss resulting from debonding orthodontic molar tubes

Bond strength of a fluoride-releasing bracket adhesive

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