Biomimetic mineral coatings in dental and orthopaedic implantology

Liu, Yue-lian; Groot, K. de; Hunziker, Ernst B.

doi:10.1007/s11706-009-0027-y

Cited by 18 publications

(4 citation statements)

References 66 publications

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“…The principle of plasma spraying consists of producing an ionised gas (plasma) in which hydroxyapatite powder is injected, melted and transported. A substrate located at a controlled distance from the spray gun is coated by a layer with a composition expected to be close to that of the initial powder [14][15][16][17]. However, due to the very high temperature produced by the plasma flux, the initial HA powder undergoes full or partial melting and decomposition during plasma spraying.…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun

Demnati

Parco

Grossin

et al. 2012

Surface and Coatings Technology

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Plasma-sprayed hydroxyapatite (HA) coatings are used on metallic implants to improve osseointegration and bone growth. The purpose of this work was to determine the microstructure and composition of HA coatings obtained with a newly developed low energy plasma spray mini-gun employing an HA feedstock powder with smaller granulometry than that commonly used. The microstructure and the phase composition of the coatings obtained by varying the number of mini-gun runs were examined using scanning electron microscopy, X-ray diffraction and Fourier transform infrared and micro-Raman spectroscopy. In all cases, the results indicate the presence of an amorphous phase and oxyapatite in the coatings due to hydroxyl group removal. No other foreign crystalline phases were detected. The absence of foreign phases was attributed to the fast cooling rate of the small particles used in the experiments and the low amount of energy employed with the mini-gun. Decomposition in the υ 1 PO 4 region of the Raman spectra allowed a semi-quantitative evaluation of the phase contents as a function of the number of runs. Micro-Raman spectroscopy appears to be a powerful technique providing comprehensive and localised information concerning calcium phosphate phases in coatings.

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Section: Introductionmentioning

confidence: 99%

Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun

Demnati

Parco

Grossin

et al. 2012

Surface and Coatings Technology

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“…In addition, they do not require line of sight and thus allow complex shapes to be coated (Habibovic, Barrere, Blitterswijk, Groot, & Layrolle, 2002;Liu, de Groot, & Hunziker, 2009). Nevertheless, in all cases, calcium orthophosphates are precipitated and grown on the surface of Mg and its alloys.…”

Section: Biomimetic Deposition and Wet Chemical Precipitationmentioning

confidence: 99%

Surface modification of magnesium and its biodegradable alloys by calcium orthophosphate coatings to improve corrosion resistance and biocompatibility

Dorozhkin¹

2015

Surface Modification of Magnesium and Its Alloys for Biomedical Applications

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“…Biomimetic deposition of microelements onto surfaces of titanium implant materials is a time consuming technique in the manufacture of implants. This method may take several weeks but allows hydroxyapatite and other calcium phosphate molecules to be deposited on the surfaces with complex geometry in a simulated body fluid solution under physiological conditions of temperature and pH [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Role of Biomimetic Incubation of Sandblasted Titanium Implants in the Process of Osseointegration: An Experimental Study in Dogs

Khabilov¹,

Melkumyan²,

Mun³

et al. 2015

Int J Biomed

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The aim of the present study was to examine the surface characteristics and values of removal torque of an implant surface subjected to sandblasting with 125 µm Al 2 O 3 particles with a following immersion in biomimetic fluid and to compare that surface with a machined implant surface.Study protocol: Forty-eight conical implants were initially made of second-grade titanium alloy. The diameter of implants was 4 mm at the head and 2.6 at the apex, all implants were of 8 mm length and of large variable thread design. Half of them were subjected to sand blasting and immersion in biomimetic fluid at 37 °C for four weeks with daily replenishment of solution until the moment of placement; another 24 implants were left with untreated machined surface. Three-dimensional roughness values were obtained with the help of confocal laser scanning microscope.Forty-eight implants were implanted in 12 dogs. Twenty-four implants were retrieved after a 6-week healing period following installation, and the remaining 24 were removed upon the completion of 16 weeks, using a torque calibrator ((BTG150CN-S TOHNICHI) with a 20 cN·m -150 cN·m scale of force registration was applied for the measurements of the removal torque.Results: The mean 3-dimensional roughness value of biomimetically treated implant surfaces was 1.34±0.24 µm and the mean roughness value measured for the machined surfaces was 0.33±0.04 µm (P<0.05). As to the average parameters of maximum peak-trough distance, these were equal to 2.85 for machined and 24.25 for incubated sandblasted implants. Machined implants demonstrated 49.5±10.3 removal torque values after the 6-week healing period. But for the immersed sandblasted implants the same parameter was equal to 72.7±15.98 cN·m. During a 16-week recovery period, these values increased up to 77.5±15.16 cN·m and 89.7±11.83 cN·m for machined and biomimetically treated sandblasted implants, respectively, P<0.05.Conclusion: The present study demonstrated the rapid recovery time for biomimetically incubated sandblasted dental implants in comparison to machined surface implants based on findings of early (6 weeks healing period) removal tests. Although there was established only a 13.4% difference in values of removal torque after a 16-week healing period (instead of 32% after 6 weeks of recovery) between two groups of implants which could be associated with delayed bone integration.

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Biomimetic mineral coatings in dental and orthopaedic implantology

Cited by 18 publications

References 66 publications

Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun

Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun

Surface modification of magnesium and its biodegradable alloys by calcium orthophosphate coatings to improve corrosion resistance and biocompatibility

The Role of Biomimetic Incubation of Sandblasted Titanium Implants in the Process of Osseointegration: An Experimental Study in Dogs

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