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Shear Bond Strength of Orthodontic Brackets Fixed with Remineralizing Adhesive Systems after Simulating One Year of Orthodontic Treatment.

Bezerra GL, Torres CR, Tonetto MR, Borges AH, Kuga MC, Bandeca MC, Firoozmand LM - ScientificWorldJournal (2015)

Bottom Line: Kruskal-Wallis and Mann-Whitney (with Bonferroni correction) tests showed a significant difference between the studied groups (p < 0.05).Groups XT, QC, and SEP presented the highest values of adhesive resistance and no statistical differences were found between them.Quick Cure (QC) remineralizing adhesive system presented average adhesive resistance values similar to conventional (XT) and self-etching (SEP) adhesives, while remineralizing system (OL) provided the lowest values of adhesive resistance.

View Article: PubMed Central - PubMed

Affiliation: CEUMA University, Josué Montello 01, Renascença II, 65.075-120 São Luís, MA, Brazil.

ABSTRACT
The objective of this study is to assess, in vitro, the shear bond strength of orthodontic brackets fixed with remineralizing adhesive systems submitted to thermomechanical cycling, simulating one year of orthodontic treatment. Sixty-four bovine incisor teeth were randomly divided into 4 experimental groups (n = 16): XT: Transbond XT, QC: Quick Cure, OL: Ortholite Color, and SEP: Transbond Plus Self-Etching Primer. The samples were submitted to thermomechanical cycling simulating one year of orthodontic treatment. Shear bond strength tests were carried out using a universal testing machine with a load cell of 50 KgF at 0.5 mm/minute. The samples were examined with a stereomicroscope and a scanning electron microscope (SEM) in order to analyze enamel surface and Adhesive Remnant Index (ARI). Kruskal-Wallis and Mann-Whitney (with Bonferroni correction) tests showed a significant difference between the studied groups (p < 0.05). Groups XT, QC, and SEP presented the highest values of adhesive resistance and no statistical differences were found between them. The highest frequency of failures between enamel and adhesive was observed in groups XT, QC, and OL. Quick Cure (QC) remineralizing adhesive system presented average adhesive resistance values similar to conventional (XT) and self-etching (SEP) adhesives, while remineralizing system (OL) provided the lowest values of adhesive resistance.

No MeSH data available.


Related in: MedlinePlus

(a) Images of group QC. (a) Magnification of 500x showing injuries in the enamel with the bracket debonding. (b) Images in stereomicroscope of the tooth buccal and (c) bracket base.
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fig2: (a) Images of group QC. (a) Magnification of 500x showing injuries in the enamel with the bracket debonding. (b) Images in stereomicroscope of the tooth buccal and (c) bracket base.

Mentions: The group bonded with the antibacterial adhesive Quick Cure (QC) presented cracks and depression on the enamel surface after removing the brackets, presenting damage to the tooth structure (Figure 2).


Shear Bond Strength of Orthodontic Brackets Fixed with Remineralizing Adhesive Systems after Simulating One Year of Orthodontic Treatment.

Bezerra GL, Torres CR, Tonetto MR, Borges AH, Kuga MC, Bandeca MC, Firoozmand LM - ScientificWorldJournal (2015)

(a) Images of group QC. (a) Magnification of 500x showing injuries in the enamel with the bracket debonding. (b) Images in stereomicroscope of the tooth buccal and (c) bracket base.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4563098&req=5

fig2: (a) Images of group QC. (a) Magnification of 500x showing injuries in the enamel with the bracket debonding. (b) Images in stereomicroscope of the tooth buccal and (c) bracket base.
Mentions: The group bonded with the antibacterial adhesive Quick Cure (QC) presented cracks and depression on the enamel surface after removing the brackets, presenting damage to the tooth structure (Figure 2).

Bottom Line: Kruskal-Wallis and Mann-Whitney (with Bonferroni correction) tests showed a significant difference between the studied groups (p < 0.05).Groups XT, QC, and SEP presented the highest values of adhesive resistance and no statistical differences were found between them.Quick Cure (QC) remineralizing adhesive system presented average adhesive resistance values similar to conventional (XT) and self-etching (SEP) adhesives, while remineralizing system (OL) provided the lowest values of adhesive resistance.

View Article: PubMed Central - PubMed

Affiliation: CEUMA University, Josué Montello 01, Renascença II, 65.075-120 São Luís, MA, Brazil.

ABSTRACT
The objective of this study is to assess, in vitro, the shear bond strength of orthodontic brackets fixed with remineralizing adhesive systems submitted to thermomechanical cycling, simulating one year of orthodontic treatment. Sixty-four bovine incisor teeth were randomly divided into 4 experimental groups (n = 16): XT: Transbond XT, QC: Quick Cure, OL: Ortholite Color, and SEP: Transbond Plus Self-Etching Primer. The samples were submitted to thermomechanical cycling simulating one year of orthodontic treatment. Shear bond strength tests were carried out using a universal testing machine with a load cell of 50 KgF at 0.5 mm/minute. The samples were examined with a stereomicroscope and a scanning electron microscope (SEM) in order to analyze enamel surface and Adhesive Remnant Index (ARI). Kruskal-Wallis and Mann-Whitney (with Bonferroni correction) tests showed a significant difference between the studied groups (p < 0.05). Groups XT, QC, and SEP presented the highest values of adhesive resistance and no statistical differences were found between them. The highest frequency of failures between enamel and adhesive was observed in groups XT, QC, and OL. Quick Cure (QC) remineralizing adhesive system presented average adhesive resistance values similar to conventional (XT) and self-etching (SEP) adhesives, while remineralizing system (OL) provided the lowest values of adhesive resistance.

No MeSH data available.


Related in: MedlinePlus