نتایج جستجو برای: titanium elastic nails
تعداد نتایج: 109498 فیلتر نتایج به سال:
INTRODUCTION Cleidocranial dysplasia (CCD) is a rare inherited skeletal dysplasia, often with prolonged retention of deciduous teeth and several impacted permanent successors and supernumerary elements. METHODS This article demonstrates the usefulness of titanium screws for orthodontic anchorage to induce eruption of the impacted teeth in a patient with CCD. A boy, aged 10 years 11 months, ha...
Thermoreversible gelcasting, a near-net-shape processing technique, is demonstrated here for titanium. The gelcasting system is composed of TiH2 particles suspended in a triblock copolymer gel that behaves as a viscous liquid above 56 C and an elastic solid at room temperature, a temperature-dependent transition that is fully reversible when solvent is present. Organic pyrolysis to remove the g...
Objective: To assess the mechanical effects of nickel-titanium orthodontic archwire flaming and their distribution along the wire. Methodology: Two sizes of pre-formed austenitic nickel-titanium archwires were tested (n=10). The terminal 5mm of each wire was heated for five seconds using a butane lighter. Micro-hardness testing was used to determine the heat-affected zone for all wires. Cantile...
UNLABELLED The Inman Aligner is a highly effective and unique evolution of the traditional spring retainer that uses super-elastic Nickel-Titanium open coil springs to move upper and lower anterior teeth with light but consistent forces, enabling correction of anterior crowding, rotations and some types of spacing. CLINICAL RELEVANCE This article describes the appliance, its uses and limitati...
Titanium (IV) oxide as a burning rate catalyst is commonly used in some of the solid composite propellants. As the particle size of this component decreases, the final properties of the propellant will be changed. In this research, effects of using submicron titanium oxide, up to 0.5 percent by weight, have been investigated on properties of an HTPB/AP/Al propellant. TiO2 powder has relatively ...
We performed a randomised, prospective trial to evaluate the use of unreamed titanium nails for femoral fractures. Of 48 patients with 50 femoral fractures 45 were followed to union; 23 with an unreamed and 22 with a reamed nail. The study was stopped early because of a high rate of implant failure. The fractures in the unreamed group were slower to unite (39.4 weeks) than those in the reamed g...
Completely displaced metaphyseal fractures of the proximal humerus in older children may need reduction and stabilization. The authors describe a technique for closed reduction and intramedullary stabilization of these fractures using a centromedullary pin inserted from the distal humerus through a small distal incision. This technique was used successfully in 2 adolescents. Retrograde elastic ...
BACKGROUND Intramedullary nails are the primary choice for treating long bone fractures. However, complications following nail surgery including non-union, delayed union, and fracture of the bone or the implant still exist. Reducing nail stiffness while still maintaining sufficient stability seems to be the ideal solution to overcome the abovementioned complications. METHODS In this study, a ...
Bone infection remains a formidable challenge to the medical field. The goal of the current study is to evaluate antibacterial coatings in vitro and to develop a large animal model to assess coated bone implants. A novel coating consisting of titanium oxide and siloxane polymer doped with silver was created by metal-organic methods. The coating was tested in vitro using rapid screening techniqu...
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