Lanthanum-containing hydroxyapatite coating on ultrafine-grained titanium by micro-arc oxidation: a promising strategy to enhance overall performance of titanium.
Titanium is widely used in biomedical materials, particularly in dental implants, because of its excellent biocompatibility and mechanical characteristics. However, titanium implant failures still remain in some cases, varying with implantation sites and patients. Improving its overall performance is a major focus of dental implant research. Equal-channel angular pressing (ECAP) can result in ultrafine-grained titanium with superior mechanical properties and better biocompatibility, which significantly benefits dental implants, and without any harmful alloying elements. Lanthanum (La) can inhibit the acidogenicity of dental plaque and La-containing hydroxyapatite (La-HA) possesses a series of attractive properties, in contrast to La-free HA. Micro-arc oxidation (MAO) is a promising technology that can produce porous and firmly adherent hydroxyapatite (HA) coatings on titanium substrates. Therefore, we hypothesize that porous La-containing hydroxyapatite coatings with different La content (0.89%, 1.3% and 1.79%) can be prepared on ultrafine-grained (~200-400 nm) titanium by ECAP and MAO in electrolytic solution containing 0.2 mol/L calcium acetate, 0.02 mol/L beta-glycerol phosphate disodium salt pentahydrate (beta-GP), and lanthanum nitrate with different concentrations to further improve the overall performance of titanium, which are expected to have great potential in medical applications as a dental implant.
Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China (mainland).
Zhennan
Z
Deng
Department of Nutrition and Food Hygiene, Wenzhou Municipal Centers for Disease Control and Prevention, Wenzhou, China (mainland).
LiLi
L
Wang
Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China (mainland).
Dafeng
D
Zhang
Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China (mainland).
Jinsong
J
Liu
Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China (mainland).
Chuantong
C
Liu
Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China (mainland).
Jianfeng
J
Ma
D001672:Biocompatible Materials / Q000737:chemistry*; D015921:Dental Implants; D017886:Durapatite / Q000032:analysis / Q000737:chemistry*; D006801:Humans; D007811:Lanthanum / Q000737:chemistry*; D008422:Materials Testing; D010084:Oxidation-Reduction; D016062:Porosity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000592:standards* / Q000627:therapeutic use
D001672:Biocompatible Materials; D015921:Dental Implants; D007811:Lanthanum; D017886:Durapatite; D014025:Titanium