Biologic stability of plasma ion-implanted miniscrews

Cho, Young Chae; Yul, Jung; Hwang, Chung Ju; Park, Young Chel; Jung, Han Sung; Yu, Hyung Seog

doi:10.4041/kjod.2013.43.3.120

Cited by 19 publications

(14 citation statements)

References 16 publications

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“…Many methods including surface treatments such as polishing and modification of surface free energy10111213 have been employed to reduce or nullify the bacterial aggregation around titanium-based prosthesis. Elemental silver has been specifically known for its array of antimicrobial properties for many years 14.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of silver nanoparticles on the surface of orthodontic microimplants to achieve antimicrobial properties

et al. 2017

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ObjectiveMicrobial aggregation around dental implants can lead to loss/loosening of the implants. This study was aimed at surface treating titanium microimplants with silver nanoparticles (AgNPs) to achieve antibacterial properties.MethodsAgNP-modified titanium microimplants (Ti-nAg) were prepared using two methods. The first method involved coating the microimplants with regular AgNPs (Ti-AgNP) and the second involved coating them with a AgNP-coated biopolymer (Ti-BP-AgNP). The topologies, microstructures, and chemical compositions of the surfaces of the Ti-nAg were characterized by scanning electron microscopy (SEM) equipped with energy-dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). Disk diffusion tests using Streptococcus mutans, Streptococcus sanguinis, and Aggregatibacter actinomycetemcomitans were performed to test the antibacterial activity of the Ti-nAg microimplants.ResultsSEM revealed that only a meager amount of AgNPs was sparsely deposited on the Ti-AgNP surface with the first method, while a layer of AgNP-coated biopolymer extended along the Ti-BP-AgNP surface in the second method. The diameters of the coated nanoparticles were in the range of 10 to 30 nm. EDS revealed 1.05 atomic % of Ag on the surface of the Ti-AgNP and an astounding 21.2 atomic % on the surface of the Ti-BP-AgNP. XPS confirmed the metallic state of silver on the Ti-BP-AgNP surface. After 24 hours of incubation, clear zones of inhibition were seen around the Ti-BP-AgNP microimplants in all three test bacterial culture plates, whereas no antibacterial effect was observed with the Ti-AgNP microimplants.ConclusionsTitanium microimplants modified with Ti-BP-AgNP exhibit excellent antibacterial properties, making them a promising implantable biomaterial.

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Section: Introductionmentioning

confidence: 99%

Incorporation of silver nanoparticles on the surface of orthodontic microimplants to achieve antimicrobial properties

et al. 2017

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“…Furthermore, previous studies have mostly assessed miniscrews with MS. However, the use of miniscrews with treated surfaces is gradually increasing, with improved success rates 910. Therefore, we assessed both MS and ES in the present study.…”

Section: Discussionmentioning

confidence: 99%

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

et al. 2017

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ObjectiveThe aim of this study was to compare recycled and unused orthodontic miniscrews to determine the feasibility of reuse. The comparisons included both miniscrews with machined surfaces (MS), and those with etched surfaces (ES).MethodsRetrieved MS and ES were further divided into three subgroups according to the assigned recycling procedure: group A, air-water spray; group B, mechanical cleaning; and group C, mechanical and chemical cleaning. Unused screws were used as controls. Scanning electron microscopy, energy-dispersive X-ray spectrometry, insertion time and maximum insertion torque measurements in artificial bone, and biological responses in the form of periotest values (PTV), bone–implant contact ratio (BIC), and bone volume ratio (BV) were assessed.ResultsMorphological changes after recycling mainly occurred at the screw tip, and the cortical bone penetration success rate of recycled screws was lower than that of unused screws. Retrieved ES needed more thorough cleaning than retrieved MS to produce a surface composition similar to that of unused screws. There were no significant differences in PTV or BIC between recycled and unused screws, while the BV of the former was significantly lower than that of the latter (p < 0.05).ConclusionsThese results indicate that reuse of recycled orthodontic miniscrews may not be feasible from the biomechanical aspect.

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“…The stability and biocompatibility of orthodontic miniscrews/ TADs is vital to the clinical success of the product [24,25]. Although the devices have a common composition of titanium few published reports analyze the cytotoxic potential of such devices.…”

Section: Discussionmentioning

confidence: 99%

Biocompatibility of Temporary Anchorage Devices Using an in vitro Cell Culture Model

Birg¹,

Wheater²

2016

J Dent Oro Surg

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Objective: The objective of this study was to evaluate the biocompatibility of five commercially available orthodontic miniscrews/ temporary anchorage devices. Materials and Methods:A cell culture system using commercially available human gingival fibroblasts was utilized. Miniscrews/ temporary anchorage devices obtained from Ormco, Ortho Organizer, 3M Unitek, American Orthodontics, and Rocky Mountain Orthodontics were immersed in culture medium for either 48 hours or two weeks. The surface area to volume character of the eluates produced by this method was within the suggested ISO range. Gingival fibroblasts were exposed to miniscrew/temporary anchorage device conditioned culture medium for 24 hours. Biocompatibility and cytotoxicity were measured using colorimetric 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays. Results were analyzed using ANOVA with Tukey's post-test and P < 0.05).Results: LDH analysis showed no differences in disruption of cell membrane integrity, suggesting that the miniscrews/temporary anchorage devices were not cytotoxic to gingival fibroblasts (P > 0.05 for all comparisons). MTT analysis, used to quantify viable cells, demonstrated that 48 hour conditioned medium significantly affected cell viability (P < 0.001 for all treatments compared to control). In contrast two week conditioned medium from all five devices did not affect cell viability compared to control. Conclusion:The results of this study suggest that miniscrews/ temporary anchorage devices demonstrate longer-term biocompatibility with gingival fibroblasts and that the composition of the devices is not cytotoxic to oral cells. The general lack of data regarding the cytotoxicity of miniscrews/temporary anchorage devices in orthodontic treatment warrants further investigation.

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Biologic stability of plasma ion-implanted miniscrews

Cited by 19 publications

References 16 publications

Incorporation of silver nanoparticles on the surface of orthodontic microimplants to achieve antimicrobial properties

Incorporation of silver nanoparticles on the surface of orthodontic microimplants to achieve antimicrobial properties

Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews

Biocompatibility of Temporary Anchorage Devices Using an in vitro Cell Culture Model

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