Effects of hydrofluoric acid and anodised micro and micro/nano surface implants on early osseointegration in rats
| Autor: | Yongfeng Li, Liang Kong, Kaijin Hu, Yuan Gao, Jianrui Xiao, Bo Shao |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Surface Properties
Dentistry Hydrofluoric Acid Osseointegration Rats Sprague-Dawley chemistry.chemical_compound Hydrofluoric acid Implants Experimental Materials Testing Nano Animals Medicine Titanium Analysis of Variance business.industry Anodizing technology industry and agriculture Titanium alloy X-Ray Microtomography Microcomputed tomography Rats Otorhinolaryngology chemistry Nanoparticles Surface modification Female Surgery Implant Oral Surgery business Biomedical engineering |
| Zdroj: | British Journal of Oral and Maxillofacial Surgery. 50:779-783 |
| ISSN: | 0266-4356 |
| DOI: | 10.1016/j.bjoms.2011.12.008 |
| Popis: | Our aim was to evaluate the effects of hydrofluoric acid and anodised micro and micro/nano surface implants on bony ingrowth in the earliest stage of implantation in rats. Sixty cylindrical screwed titanium alloy implants with machined, micro, and hierarchical hybrid micro/nano surfaces ( n = 20 in each group) were inserted into the distal femurs of 30 female Sprague-Dawley rats. In vivo microcomputed tomography (micro CT) was used to assess microarchitectural changes in the bone around the implants 2 weeks after implantation. All the animals were then killed and the femurs with implants harvested for histological analysis and pull-out testing. Micro CT analysis showed that the trabecular thickness and the bone:volume ratio (bone volume:total volume) (BV:TV) increased significantly in the micro/nano group compared with the other two groups, while the trabecular separation decreased significantly in the micro/nano group compared with the machined group. The mean (SD) bone-implant contacts (%) were 38.94 (9.48), 41.67 (8.71), and 51.49 (12.49) in the machined, micro, and micro/nano groups, respectively. The maximum pull-out forces (N) were 64.95 (6.11), 71.45 (7.15), and 81.90 (13.1), respectively. Both bone-implant contacts and maximum pull-out forces were significantly higher in the micro/nano group, but there was no significant difference between the micro group and the machined group. These data indicate that the hierarchical hybrid micro/nano surface of the implant can promote osseointegration in the earliest stage of implantation, and may be a promising option for further clinical use. |
| Databáze: | OpenAIRE |
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