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BioMed Research International - Volume 2015 2015, Article ID 857969, 8 pages -

Research Article

Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand

Department of Dental Biomaterials and Institute of Biodegradable Materials, Institute of Oral Bioscience and BK21 Plus Project, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea

Department of New Drug Discovery and Development, Chungnam National University, Daejeon, Republic of Korea

Received 10 May 2015; Accepted 27 May 2015

Academic Editor: Yongsung Hwang

Copyright © 2015 Warwick J. Duncan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Spark discharge anodic oxidation forms porous TiO2 films on titanium implant surfaces. This increases surface roughness and concentration of calcium and phosphate ions and may enhance early osseointegration. To test this, forty 3.75 mm × 13 mm titanium implants Megagen, Korea were placed into healed mandibular postextraction ridges of 10 sheep. There were 10 implants per group: RBM surface control, RBM + anodised, RBM + anodised + fluoride, and titanium alloy + anodised surface. Resonant frequency analysis RFA was measured in implant stability quotient ISQ at surgery and at sacrifice after 1-month unloaded healing. Mean bone-implant contact % BIC was measured in undemineralised ground sections for the best three consecutive threads. One of 40 implants showed evidence of failure. RFA differed between groups at surgery but not after 1 month. RFA values increased nonsignificantly for all implants after 1 month, except for controls. There was a marked difference in BIC after 1-month healing, with higher values for alloy implants, followed by anodised + fluoride and anodised implants. Anodisation increased early osseointegration of rough-surfaced implants by 50–80%. RFA testing lacked sufficient resolution to detect this improvement. Whether this gain in early bone-implant contact is clinically significant is the subject of future experiments.





Autor: Warwick J. Duncan, Min-Ho Lee, Tae-Sung Bae, Sook-Jeong Lee, Jennifer Gay, and Carolina Loch

Fuente: https://www.hindawi.com/



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