Evaluation of Antimicrobial Properties and Shear Bond Strength of Conventional Orthodontic Adhesive Modified With Calotropis gigantea Nanoparticles: An In Vitro Study

Bonding of brackets with adhesives during orthodontic fixed appliance therapy is associated with white spot lesions (WSLs). An adhesive developed with an antimicrobial property is advantageous to prevent decalcification of the enamel surface. The current study assesses the antimicrobial and shear bo...

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Bibliographic Details
Published in:Curēus (Palo Alto, CA) CA), 2023-12, Vol.15 (12), p.e51182-e51182
Main Authors: Ravuru, Divya, Vivek Reddy, Ganugapanta, Bhupathi, Arun, Sunil Kumar, Karumuri Taraka, Singaraju, Gowri Sankar, Mandava, Prasad
Format: Article
Language:English
Subjects:
Adhesives
Antimicrobial agents
Bond strength
Composite materials
Dental enamel
Dentistry
Leaves
Lipids
Nanoparticles
Natural products
Oral hygiene
Orthodontics
Particle size
Patients
Resins
Sample size
Teeth
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Summary:Bonding of brackets with adhesives during orthodontic fixed appliance therapy is associated with white spot lesions (WSLs). An adhesive developed with an antimicrobial property is advantageous to prevent decalcification of the enamel surface. The current study assesses the antimicrobial and shear bond strength (SBS) characteristics of an experimental conventional orthodontic adhesive incorporated with different concentrations of nanoparticles (NPs) prepared from the leaves of and compares them with non-admixed conventional adhesive. A total of 40 premolar teeth therapeutically extracted for orthodontic purposes were randomly assigned to four equal groups of n = 10 each. In control Group I, unmodified conventional adhesive was used to bond the brackets. In the three experimental groups, Group II, Group III, and Group IV, the brackets were bonded with modified conventional adhesive admixed with the NPs in concentrations of 1%, 5%, and 10%, respectively. The agar well diffusion test and the disc agar diffusion (DAD) test were utilized for assessing the anti-microbial activity of the composite discs. The SBS of the groups was determined by a universal testing machine. A one-way ANOVA and Tukey's honestly significant difference (HSD) post-hoc test was used to analyze the difference in shear bond strength and microbial inhibition zone diameter between the groups with a probability (p) value of equal to or less than 0.05 as statistical significance. The mean SBS for Group I without nanoparticles is 6.99±0.75 MPa. The SBS value decreased inversely in proportion to the concentration of NPs: Group II (1% NP) 6.29±0.67 MPa; Group III (5% NP) 4.40±0.47 MPa; and Group IV (10% NP) 1.98±0.21 MPa, which is statistically significant (p < 0.001). The incorporation of NPs resulted in a decrease in the actual microbial potency of the conventional adhesive. Isolated NPs, when used alone, proved to have antimicrobial efficacy, but orthodontic adhesives admixed with NPs showed no additive effect, and SBS values decreased with increased concentrations of NPs.
ISSN:2168-8184
2168-8184
DOI:10.7759/cureus.51182