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Improvement of osseointegration of Ti–6Al–4V ELI alloy orthodontic mini-screws through anodization, cyclic pre-calcification, and heat treatments
DC Field | Value | Language |
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dc.contributor.author | Im, Changkyun | - |
dc.contributor.author | Park, Je-Hyeok | - |
dc.contributor.author | Jeon, Young-Mi | - |
dc.contributor.author | Kim, Jong-Ghee | - |
dc.contributor.author | Jang, Yong-Seok | - |
dc.contributor.author | Lee, Min-Ho | - |
dc.contributor.author | Jeon, Woo-Yong | - |
dc.contributor.author | Kim, Jun-Min | - |
dc.contributor.author | Bae, Tae-Sung | - |
dc.date.accessioned | 2022-05-10T01:56:47Z | - |
dc.date.available | 2022-05-10T01:56:47Z | - |
dc.date.issued | 2022-04-04 | - |
dc.identifier.citation | Progress in Orthodontics. 2022 Apr 04;23(1):11 | - |
dc.identifier.uri | https://doi.org/10.1186/s40510-022-00405-8 | - |
dc.identifier.uri | https://hdl.handle.net/10371/179646 | - |
dc.description.abstract | Abstract
Background Mini-screws are widely used as temporary anchorages in orthodontic treatment, but have the disadvantage of showing a high failure rate of about 10%. Therefore, orthodontic mini-screws should have high biocompatibility and retention. Previous studies have demonstrated that the retention of mini-screws can be improved by imparting bioactivity to the surface. The method for imparting bioactivity proposed in this paper is to sequentially perform anodization, periodic pre-calcification, and heat treatments with a Ti–6Al–4V ELI alloy mini-screw. Materials and methods A TiO2 nanotube-structured layer was formed on the surface of the Ti–6Al–4V ELI alloy mini-screw through anodization in which a voltage of 20V was applied to a glycerol solution containing 20 wt% H2O and 1.4 wt% NH4F for 60min. Fine granular calcium phosphate precipitates of HA and octacalcium phosphate were generated as clusters on the surface through the cyclic pre-calcification and heat treatments. The cyclic pre-calcification treatment is a process of immersion in a 0.05M NaH2PO4 solution and a saturated Ca(OH)2 solution at 90°C for 1min each. Results It was confirmed that the densely structured protrusions were precipitated, and Ca and P concentrations, which bind and concentrate endogenous bone morphogenetic proteins, increased on the surface after simulated body fluid (SBF) immersion test. In addition, the removal torque of the mini-screw fixed into rabbit tibias for 4weeks was measured to be 8.70 ± 2.60Ncm. Conclusions A noteworthy point in this paper is that the Ca and P concentrations, which provide a scaffold suitable for endogenous bone formation, further increased over time after SBF immersion of the APH group specimens. The other point is that our mini-screws have a significantly higher removal torque compared to untreated mini-screws. These results represent that the mini-screw proposed in this paper can be used as a mini-screw for orthodontics. | - |
dc.title | Improvement of osseointegration of Ti–6Al–4V ELI alloy orthodontic mini-screws through anodization, cyclic pre-calcification, and heat treatments | - |
dc.type | Journal Article | - |
dc.language.rfc3066 | en | - |
dc.rights.holder | The Author(s) | - |
dc.date.updated | 2022-04-10T03:17:28Z | - |
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