Author(s) Asiry, M.A.; Alshahrani, I.; Alqahtani, N.D.; Durgesh, B.H.
Journal J Nanosci Nanotechnol
Date Published 2019 Feb 01

Our study evaluated the adhesion strength and antibacterial effect of a conventional orthodontic composite resin blended with yttrium fluoride (YF₃) nanoparticles. Yttrium fluoride nanoparticles (NP) were added to the conventional orthodontic composite resin (Transbond XT) at concentrations of 1%, 2%, and 3% (w/w), and the blended composite resins were labeled as NP1, NP2, and NP3, respectively. A total of 60 extracted human premolars was randomly allocated to four groups of 15 samples ( = 15). Orthodontic brackets were bonded using the conventional (control) and experimental composite resins (NP1, NP2, and NP3). The adhesion strengths of the composite resins were determined using a universal testing machine. The debonding sites were assessed and scored using the adhesive remnant index (ARI). The antibacterial effect of YF₃ nanoparticles against was assessed by the viable cell counting method. For the same, 40 composite disc specimens were prepared using the control and experimental composite resins ( = 10). The data was analyzed by one-way ANOVA and Tukey's analysis. In all the tests, the significance level was determined to be 0.05. The highest adhesion strength values were found in the control group (11.61±0.23) and the lowest values were found in the NP3 group (10.49±0.17). A significant difference was observed between the control and experimental groups, NP2 and NP3 ( < 0.05). NP1 group showed insignificant ( = 0.388) adhesion strength values compared with the control group. There was no significant difference between the ARI scores of the conventional and experimental groups ( > 0.05). The highest colony forming units (CFU) were found in the control group (75.85±1.15) and the lowest CFU were found in the NP1 group (2.24±1.14). A significant difference between the mean CFU of the conventional and experimental composite groups was observed ( < 0.05). Despite higher antibacterial activity in the NP1 group compared with NP2 ( = 0.146) and NP3 ( = 0.117), the difference was not significant. Similarly, no significant difference was observed between NP2 and NP3 groups ( = 0.97). Our results suggested that yttrium fluoride nanoparticles, blended with a conventional resin at 1% concentration, demonstrated significant antibacterial effect and did not compromise adhesion strength.

DOI 10.1166/jnn.2019.15894
ISSN 1533-4880
Citation Asiry MA, Alshahrani I, Alqahtani ND, Durgesh BH. Efficacy of Yttrium (III) Fluoride Nanoparticles in Orthodontic Bonding. J Nanosci Nanotechnol. 2019;19(2):1105-1110.

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