Nanostructured SPD Processed Titanium for Medical Implants

2008 ◽  
Vol 584-586 ◽  
pp. 49-54 ◽  
Author(s):  
Ruslan Valiev ◽  
Irina P. Semenova ◽  
Enja Jakushina ◽  
V.V. Latysh ◽  
Henry J. Rack ◽  
...  
Keyword(s):  
Dental Implant ◽  
Pure Titanium ◽  
Strength Properties ◽  
Early Postoperative Period ◽  
Special Technique ◽  
Commercially Pure Titanium ◽  
Medical Implants ◽  
Specific Strength ◽  
Early Loading ◽  
Fatigue Characteristics

Nanostructured titanium (nTi) with essential enhanced strength and fatigue characteristics is an advanced material for dental implant applications. Nano Ti is commercially pure titanium, that was nanostructured by a special technique of severe plastic deformation. It is bio inert, does not contain even potentially toxic or allergenetic additives and has significantly higher specific strength properties than any other titanium applied in dental implants. Cylindrical threaded screw implants Nanoimplant® sized 2.4 mm in diameter and 12 mm in length were made from nTi. It is the first application of nTi dental implant in the world reported. Recently more than 250 successful clinical applications dealing with surgery on the front teeth were carried out. No complications were noticed during the early postoperative period and early loading. Laboratory cytocompatibility tests undertaken so far on mice fibroblast cells have indicated that nanocrystalline Ti surface has a significantly better property for cell colonisation and healing of tissue consequently.

scholarly journals Studying Biomimetic Coated Niobium as an Alternative Dental Implant Material to Titanium (in vitro and in vivo study)

2018 ◽  
Vol 15 (3) ◽  
pp. 253-261
Author(s):  
Baghdad Science Journal
Keyword(s):  
Dental Implant ◽  
Body Fluid ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Removal Torque ◽  
X Ray ◽  
Commercially Pure ◽  
Implant Material

Commercially pure titanium (cpTi) is widely used as dental implant material although it was found that titanium exhibited high modulus of elasticity and the lower corrosion tendency in oral environment. Niobium(Nb) was chosen for this study as an alternative to cpTi implant material due to its bioinert behavior and good elastic modulus and moderate cost in addition to corrosion resistance. This study was done to evaluate the effect of biomimetic coating on the surface properties of the commercially pure titanium and niobium implants by in vitro and in vivo experiments. The in vitro study was involved etching the samples of each material in HCl then soaking in 10M NaOH aqueous solution. These samples were then immersed in a 5 times concentrated simulated body fluid for 14 days. Scanning Electron Microscope, Energy Dispersive X-ray, and X-Ray Diffraction tests were done to analyze surface changes. The in vivo study was done by the implantation of screw-shaped implants (two from each material, uncoated and the other was biomimetically coated) in the tibias of New Zealand rabbits. After 2 and 4 weeks of healing period, 20 rabbits were sacrificed for each period. A removal torque was done for ten animals in each group, whereas the other ten were used for histological testing and histomorphometric analysis with optical microscope.The in vitro experiments showed that the use of 14 days immersion in a concentrated simulated body fluid produced a layer of calcium phosphate on metal surfaces. The removal torque values and new bone formation were increased significantly in Nb than Ti, in coated than uncoated screws, and in 4 weeks than 2 weeks healing periods. The Nb implants had better biomechanical and biological properties than the commercially pure titanium implants and can be used as an alternative dental implant.

The Influence of Hydrogen on the Process of Plastic Flow Self-Organization in Ti

2016 ◽  
Vol 685 ◽  
pp. 601-606
Author(s):  
Alexey Lunev ◽  
Mikhail V. Nadezhkin ◽  
Svetlana Barannikova ◽  
Lev B. Zuev ◽  
Natalia A. Ionova
Keyword(s):  
Pure Titanium ◽  
Strength Properties ◽  
Dissipative Structures ◽  
Structure Evolution ◽  
Material Strength ◽  
Commercially Pure Titanium ◽  
Localized Deformation ◽  
Commercially Pure ◽  
Kinetics Of ◽  
Hydrogenation Treatment

The paper presents the study of the effect of hydrogenation on the mechanical properties of commercially pure titanium. It has been found that the localized deformation zones occurring in the plastically deforming Ti samples are stationary dissipative structures. The kinetics of dissipative structure evolution was studied. The hydrogenation treatment is found to enhance a tendency to strain localization in as-treated material, which affects significantly material strength properties.

Corrosion behaviour of commercially pure titanium shot blasted with different materials and sizes of shot particles for dental implant applications

Biomaterials ◽  
2003 ◽  
Vol 24 (2) ◽  
pp. 263-273 ◽  
Author(s):  
Conrado Aparicio ◽  
F Javier Gil ◽  
Carlos Fonseca ◽  
Mario Barbosa ◽  
Josep Anton Planell
Keyword(s):  
Dental Implant ◽  
Corrosion Behaviour ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Commercially Pure

Evaluation of Press Formability of Pure Titanium Sheets

2016 ◽  
Vol 716 ◽  
pp. 87-98 ◽  
Author(s):  
Quoc Tuan Pham ◽  
Young Suk Kim
Keyword(s):  
Strain Hardening ◽  
Pure Titanium ◽  
Yield Function ◽  
Forming Limit ◽  
Commercially Pure Titanium ◽  
Specific Strength ◽  
Force Criterion ◽  
Stress Strain Relation ◽  
Cp Ti ◽  
Press Formability

Commercially pure titanium (CP Ti) has been actively used in plate heat exchangers due to its light weight, high specific strength, and excellent corrosion resistance. However compared with automotive steels and aluminum alloys, only limited research has been conducted on the plastic deformation characteristics and press formability of CP Ti sheets. In this study, the mechanical properties, including the anisotropic property and the stress-strain relation, of the CP Ti sheet are clarified in relation to press formability. A new proposed strain hardening model, Kim-Tuan equation, is successful in perfectly describing the stress evaluation for strain increment of this material during strain path. The forming limit curve (FLC) of the CP Ti sheet as a criterion for press formability was experimentally evaluated by punch stretching testing and analytically predicted via Hora’s modified maximum force criterion. The predicted FLC based on the Kim-Tuan strain hardening equation and the appropriate yield function correlates well with the experimental results of the punch stretching test.

scholarly journals A suggested design for a tissue level dental implant

2021 ◽  
Vol 11 ◽  
pp. 3
Author(s):  
Faaiz Y. Alhamdani ◽  
Basma A. Al-Ghali
Keyword(s):  
Cortical Bone ◽  
Dental Implant ◽  
Pure Titanium ◽  
Tissue Level ◽  
Von Mises Stress ◽  
Dental Arch ◽  
Commercially Pure Titanium ◽  
Element Analysis ◽  
Von Mises ◽  
Surrounding Bone

Objectives: The aim of the study was to test the stress distribution around a newly suggested design for tissue-level dental implant. Material and Methods: Newly designed modified reverse buttress thread dental implant is tested for the stress over the surrounding bone. Nine implant dimensions of this design were examined on two types of materials; commercially pure Titanium (TiG4) and Titanium alloy (TIG5). These nine implant dimensions, which can be used in the full dental arch are: (diameter/length; 3.5/11, 4/11, 4/9, 4.5/11, 4.5/9, 5/11, 5/9, 5/7, and 5.5/7 mm). The suggested implant was designed using Autodesk Inventor 202. ANSYS Workbench 2020 R2 was used for meshing and 3D finite element analysis. Results: Maximum Von Mises stress over the cortical bone is higher in the TiG5 model in all implant dimensions. The highest stress value was reported in the implant 4/9 mm dimension in both models. TiG5 model has the highest stress values over the cancellous bone. The higher level of stress over the surrounding cortical bone lies at the surface of the cortical bone, whereas the maximum stress over the surrounding trabecular bone was noticed near the tip of the first and second dental implant thread. Conclusion: Reasonable levels of stress were reported in the suggested design in both models. However, it would be justifiable to choose the TiG4 model for the suggested tissue level implant with the exclusion of a 4/9 mm dimension to ensure minimal stress over the surrounding cortical bone.

Identification Card and Codification of the Chemical and Morphological Characteristics of 14 Dental Implant Surfaces

2011 ◽  
Vol 37 (5) ◽  
pp. 525-542 ◽  
Author(s):  
David M. Dohan Ehrenfest ◽  
Lydia Vazquez ◽  
Yeong-Joon Park ◽  
Gilberto Sammartino ◽  
Jean-Pierre Bernard
Keyword(s):  
Dental Implant ◽  
Photoelectron Spectroscopy ◽  
Electron Spectroscopy ◽  
Pure Titanium ◽  
Morphological Characteristics ◽  
Daily Practice ◽  
Organic Pollution ◽  
Commercially Pure Titanium ◽  
Clear Identification ◽  
Titanium Grade

Dental implants are commonly used in daily practice; however, most surgeons do not really know the characteristics of these biomedical devices they are placing in their patients. The objective of this work is to describe the chemical and morphological characteristics of 14 implant surfaces available on the market and to establish a simple and clear identification (ID) card for all of them, following the classification procedure developed in the Dohan Ehrenfest et al (2010) Codification (DEC) system. Fourteen implant surfaces were characterized: TiUnite (Nobel Biocare), Ospol (Ospol), Kohno HRPS (Sweden & Martina), Osseospeed (AstraTech), Ankylos (Dentsply Friadent), MTX (Zimmer), Promote (Camlog), BTI Interna (Biotechnology Institute), EVL Plus (SERF), Twinkon Ref (Tekka), Ossean (Intra-Lock), NanoTite (Biomet 3I), SLActive (ITI Straumann), Integra-CP/NanoTite (Bicon). Three samples of each implant were analyzed. Superficial chemical composition was analyzed using X-ray photoelectron spectroscopy/electron spectroscopy for chemical analysis, and the 100 nm in-depth profile was established using Auger electron spectroscopy. The microtopography was quantified using light interferometry. The general morphology and nanotopography were evaluated using a field emission-scanning electron microscope. Finally, the characterization code of each surface was established using the DEC system, and the main characteristics of each surface were summarized in a reader-friendly ID card. From a chemical standpoint, of the 14 different surfaces, 10 were based on a commercially pure titanium (grade 2 or 4), 3 on a titanium-aluminum alloy (grade 5 titanium), and one on a calcium phosphate core. Nine surfaces presented different forms of chemical impregnation or discontinuous coating of the titanium core, and 3 surfaces were covered with residual aluminablasting particles. Twelve surfaces presented different degrees of inorganic pollutions, and 2 presented a severe organic pollution overcoat. Only 2 surfaces presented no pollution (Osseospeed and Ossean). From a morphological standpoint, 2 surfaces were microporous (anodization) and 12 were microrough, with different microtopographical aspects and values. Ten surfaces were smooth on the nanoscale, and therefore presented no significant and repetitive nanostructures. Four implants were nanomodified: 2 implants were nanorough (Osseospeed and Ossean), and 2 were covered with nanoparticles (NanoTite and SLActive). TiUnite and Kohno HRPS were covered with extended cracks all over the surface. Only 8 surfaces could be considered homogeneous. This systematic approach allowed the main characteristics of these commercially available products to be gathered in a single ID card. It can be used as an experimental tool or a method for controlling industrial implant productions. The DEC system could be an interesting basis for the development of a clear and simple ISO standard for dental implant surfaces and other implantable devices.

RMI 0.2% Pd

Alloy Digest ◽  
1979 ◽  
Vol 28 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Crevice Corrosion ◽  
Elevated Temperatures ◽  
Pure Titanium ◽  
Heat Treating ◽  
Low Ph ◽  
Commercially Pure Titanium ◽  
Bend Strength ◽  
Commercially Pure ◽  
Minimum Yield

Abstract RMI 0.2% Pd is a grade of commercially pure titanium to which up to 0.2% palladium has been added. It has a guaranteed minimum yield strength of 40,000 psi with good ductility and formability. It is recommended for corrosion resistance in the chemical industry and other places where the environment is mildly reducing or varies between oxidizing and reducing. The alloy has improved resistance to crevice corrosion at low pH and elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-74. Producer or source: RMI Company.

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