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Mini-implants (1-2 mm in diameter) are miniscrews that are placed in the jaw bones to help orthodontists move teeth in a controlled manner. The reasons behind their increasing popularity over the past decade is that mini-implants are easily placed and removed under local anaesthetic and can withstand up to 300 g force. Unfortunately, their high rate of failure (10-30%) poses a problem to clinicians...
How to improve the bioactivity of titanium is always the key factor in the application of titanium artificial implants. Among kinds of means to reinforce its bioactivity, deposition of bioactive layers on titanium substrates and anodic oxidation are two common and powerful means. In this study, we combined the two methods to construct a more bioactive titanium surface. Plasma spraying processed for...
Inter-connected nanoporous surface on biomedical NiTi alloy is successfully fabricated by surface dealloying of Ni in a solution containing H2O2 and HNO3. The modified surface layer is believed to be mainly consisted of titanium oxide. Inductive coupled plasma emission spectroscopy (ICP-ES) measurement of solution after dealloying process indicates the much higher concentration of Ni than that of...
This paper aims to evaluate the effect of surface roughness of commercially pure titanium (Ti) on the adhesion and proliferation of human periodontal ligament cells (hPDLCs). Four Ti surfaces of dental implants were compared through different systems in vitro. The surface roughness of Ti was measured by TR240 mobile surface roughmeter. hPDLCs were seeded on Ti and their response to smooth and rough...
The aim of the present paper is to put in evidence the environmental influence on behaviour of various structure in dentistry being based on the necessity to be conform to the concept of health & environment. The structures of studied materials are both hard and soft, natural and synthetic and the environment simulated factors are mainly heavy metals and fluoride ions. The used techniques in the...
The objective of this study was to determine the effect of hydroxylapatite (HA) ceramic coatings on the ultimate interface shear strength, the rate of development of attachment strength and the degree of bone ingrowth or apposition to various implant surfaces. For the HA-coated and uncoated porous systems the long-term maximum strengths were equivalent at about 20 MPa. The development of the maximum...
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