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Surface characteristics and stability of implants treated with alkali and heat  

Song, Yun-Seok (Department of Prosthodontics, College of Dentistry, Dankook University)
Cho, In-Ho (Department of Prosthodontics, College of Dentistry, Dankook University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.46, no.5, 2008 , pp. 490-499 More about this Journal
Abstract
Statement of problem: Bioactive materials must have the ability to spontaneously form a bone like apatite layer on their surface and induce direct biochemical bonding to bone. A simple chemical treatment via alkali and heat has been revealed to induce bioactivity in titanium. Purpose: The purpose of this study was to evaluate the surface characteristics and stability of alkali and heat treated implants. Material and methods: Specimens were divided into three groups; group 1 was the control group with machined surface implants, groups 2 and 3 were treated with alkali solutions and heat treated in the atmosphere and vacuum conditions respectively. The surface characteristics were observed with FESEM, XPS, TF-XRD and AFM. Stability was evaluated with the resonance frequency analysis, periotest and removal torque values. One-way ANOVA and Duncan test were used for statistical analysis. Results: 1. Groups treated with alkali and heat showed similar characteristics. Groups 2 and 3 showed high compositions of Na ions on the surface with sub-micron sized pores compared to group 1. Group 2 showed mixed compositions of anatase and rutile with superior contents of rutile. 2. Resonance frequency analysis : The ISQ of group 2 showed significantly higher values than that of groups 1 and 3 at 12 weeks. The ISQ of groups 1 and 2 showed significant increase after 4 weeks, and the ISQ of group 3 increased significantly after 2 and 4 weeks respectively (P < .05). 3. Periotest: The PTV of groups 1 and 2 showed significant decrease after 4 weeks, and the PTV of group 3 showed significant decrease after 2 and 4 weeks respectively (P < .05). 4. Removal torque analysis: The removal torque value of group 2 was significantly higher than those of groups 1 and 3 at 2, 4 and 8 weeks. The removal torque values of groups 1 and 3 showed increase at 4 and 12 weeks, but the removal torque value of group 2 showed increase after 4 weeks (P < .05). Conclusion: An oxide layer with appropriate crystal structure and amorphous sodium titanate layer can be obtained on titanium implants through alkali and heat treatment in the atmosphere, and even alkali and heat treatment in vacuum conditions, provided a bioactive surface containing sodium. These surface layers can be considered to be effective for enhancement of osseointegration and reduction of healing period for implant treatment.
Keywords
Alkali and heat treatment; Implant stability; Resonance frequency analysis; Periotest; Removal torque analysis;
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1 Kim HM, Miyaji F, Kokubo T, Nakamura T. Effect of heat treatment on apatite forming ability induced by alkali treatment. J Mater Sci Mater Med 1997;8:341-7   DOI   ScienceOn
2 Kokubo T, Miyaji F, Kim HM, Nakamura T. Spontaneous formation of bone like apatite layer on chemically treated titanium metals. J Am Ceram Soc 1996;79:1127-9   DOI
3 Hench L. Bioceramics: from concept to clinic. J Am Ceram Soc 1991;74:1487-510   DOI
4 Nishiguchi S, Nakamura T, Kobayashi M, Kim HM, Miyaji F, Kokubo T. The effect of heat treatment on bone bonding of alkali treated titanium. Biomaterials 1999;20:491-500   DOI   ScienceOn
5 Lim JB, Cho IH. A study on the surface characteristics and stability of implants treated with anodic oxidation and fluoride incorporation. Ph.D Thesis in 2005; College of Dentistry, Dankook University, Korea
6 Sul YT, Johansson CB, Albrektsson T. Which surface properties enhance bone response to implants? Comparison of oxidized magnesium, TiUnite, and Osseotite implant surfaces. Int J Prosthodont 2006;19:319-29   PUBMED
7 Kern T, Yang Y, Glover R, Ong JL. Effect of heat treated titanium surfaces on protein adsorption and osteoblast precursor cell initial attachment. Implant Dent 2005;14:70-6   DOI   ScienceOn
8 Lausmaa J. Multi-technique surface characterization of oxide film of electropolished and anodically oxidized titanium. Appl Surface Sci 1990;45:189-200   DOI   ScienceOn
9 Goransson A, Jansson E, Tengvall P, Wennerberg A. Bone formation after 4 weeks around blood-plasma-modified titanium implants with varying surface topographies: an in vivo study. Biomaterials 2003;24:197-205   DOI   ScienceOn
10 Lim YJ. Effects of heat treatment on the surface characteristics of titanium for implant. 2004; College of Dentistry, Seoul National University, Ph. D thesis
11 Sul YT, Johansson C, Wennerberg A, Cho LR, Chang BS, Albrektsson T. Optimal surface properties of oxidized implants for reinforcement of osseointegration: surface chemistry, oxide thickness, porosity, roughness, and crystal structure. Int J Oral Maxillofac Implants 2005;20:349-59
12 Kokubo T, Kim HM, Kawashita M, Nakamura T. Bioactive metals: preparation and properties. J Mater Sci Mater Med 2004;15:99-107   DOI   ScienceOn
13 Chosa N, Taira M, Saitoh S, Sato N, Araki Y. Characterization of apatite formed on alkaline-heat- treated Ti. J Dent Res 2004;83:465-9   DOI   ScienceOn
14 Yang B, Uchida M, Kim HM, Zhang X, Kokubo T. Preparation of bioactive metal via anodic oxidation treatment. Biomaterials 2004;25:1003-10   DOI   ScienceOn
15 Wang C, Wang M, Zhou X. Nucleation and growth of apatite on chenically treated titanium alloy: an electrochemical impedence spectroscopy study. Biomaterials 2003;24:3069-77   DOI   ScienceOn
16 Ellingsen JE. Pre-treatment of titanium implants with fluoride improves their retention in bone. J Mater Sci Mater Med 1995;6:749-53   DOI
17 Uchida M, Kim HM, Kokubo T, Fujibayashi S, Nakamura T. Structural dependence of apatite formation on titania gels in a simulated body fluid. J Biomed Mater Res A 2003;64:164-70   PUBMED
18 Darvell BW, Samman N, Luk WK, Clark RK, Tideman H. Contamination of titanium castings by aluminum oxide blasting. J Dent 1995;23:319-22   DOI   ScienceOn
19 Ishizawa H, Ogino M. Characterization of thin hydroxyapatite layers formed on anodic titanium oxide films containing Ca and P by hydrothermal treatment. J Biomed Mater Res 1995;29:1071-9   DOI   ScienceOn
20 Kim HW, Kim HE, Salih V, Knowles JC. Sol-gel modified titanium with thin hydroxyapatite thin films and effect on osteoblast-like cell responses. J Biomed Mater Res 2005;74:294-305
21 Jonasova L, Muller FA, Helebrant A, Strnad J, Greil P. Hydroxyapatite formation on alkali-treated titanium with different content of Na+ in the surface layer. Biomaterials 2003;23:3095-101
22 Maitz MF, Poon RW, Liu XY, Pham MT, Chu PK. Bioactivity of titanium following sodium plasma immersion ion implantation and deposition. Biomaterials 2005;26:5465-73   DOI   ScienceOn
23 Sul YT, Johansson CB, Jeong Y, Roser K, Wennerberg A, Albrektsson T. Oxidized implants and their influence on the bone response. J Mater Sci Mater Med 2001;12:1025-31   DOI   ScienceOn
24 Sul YT, Byon ES, Jeong Y. Biochemical measurements of calcium-incorporated oxidized implants in rabbit bone: effect of calcium surface chemistry of a novel implant. Clin Implant Dent Relat Res 2004;6:101-10   DOI   ScienceOn