Abstract Elastic stable intramedullary nailing ESIN is a new minimally invasive technique for the treatment of pediatric fractures. It approximates the physiological healing process of bone, without opening the fracture site. Also, the operative stress is minimal because of the minimally invasive nature of the procedure, and the volume of implants is small, offering a very good stability without plaster cast immobilization.
Geopolymer gained their maximum adhesion within first three days. Micro structural analysis and Infra red spectroscopy was used to study the geopolymerisation process.
Surface profile of fly ash particles shown that degree of reactivity has a direct relation with their surface roughness. Conventional concrete does not have durability and higher strength as produced by high performance concrete HPC. It is known that the HPC possess the following three properties which are high workability, high strength, and durability.
The introduction of polycarboxylate ether PCE superplasticizer was proved to enhance the workability of concrete even though at a lower water to cement ratio.
The study was conducted to find the optimum dosage of PCE and to compare its compressive strength, physical characteristics and morphology of the HPC.
The result of the test shows that the high performance concrete HPC with addition of 0. Samor Boonphan, Pisith Singjai Abstract: An ultimate tensile testing machine and an impact testing machine were used to characterize the mechanical properties of the composites.
The sample prepared using four-step heating had a lower porosity than the sample prepared using single-step heating. Puga Lambers, Kevin S. CAS2-Al2O3 Anorthite-alumina refractory materials were prepared with magnesium slag, kaolin from Shanxi province of China and alumina as raw materials.
The effects of sintering temperature, holding time and the rate of heating on the microscopic structures were investigated. The results showed that the sintering temperature and holding time are more important to CAS2-Al2O3 refractory materials than the rate of heating in a certain extent.
The higher the sintering temperature is, the greater the grains grow. At the same time, while the temperature rising, it tends to precipitate the alumina particles.
CAS2-Al2O3 refractory materials have porous mesh structure. The knowledge of magnetic and transport properties of construction steels for magnetic circuits plays an important role. Several coating systems consisting of different phases and thicknesses were manufactured.
Opto-digital microscope, scanning electron microscope and digital image analysis, second equipped with energy dispersive microanalyzer, were utilized to characterize the microstructure, chemical composition and thicknesses of the coatings. The influence of coatings on magnetic properties in the frequency range of Hz was also measured.
The effect of long dwell time at elevated temperatures on two types of steels used for production of heavy forgings was evaluated. Subsequently the annealing at selected temperatures for hours was applied. Tensile test, hardness and impact energy measurements were used for the evaluation.
In this paper we conducted a case study on a rod used for hip replacement due to coxartrosis. The implant was used for hip replacement for NC patient aged 82 years.
After twelve months the patient returns for the ablation of osteosynthesis material. Clinical and strengthen the fracture hip is found radiologic hypertrophic and degradation plaque. It was used a rod implant, on which were made following investigations in order to establish the causes that led to the fracture, namely: Complex analysis of the fracture surfaces of the hip prosthesis has led to the ultimate conclusion that the material has been made the hip prosthesis is inadequate chemical purity satisfactory embedding, which has led to breakage within an area of non-homogeneous structure.
The engineering stress-strain curves with the thermal deformation at the different temperatures, the tensile strength and elongation curves were obtained. Metallographic test samples were prepared and the morphology of deforming zone was observed by optical microscopy.
The experimental results showed that the tensile strength of the test samples decreased with increasing temperature. The strength of stainless steel decreased, and the plasticity increased with the increase in temperature.
A transition occurred to the form of fracture from the ductile to the brittle, which might be related to the nitrogen atom in the Grain deformation along specimen tensile direction concentrated in the necking region, where appeared banded structure in martensite. The organization at the edge of the sample was fine, while the organization at the central region was coarser.Results: After a mean follow-up of months, four types of complications were identified: material expulsion (20 cases), migration (3 cases), incurvation (7 cases), fracture of material (12 cases).
4 types of factors causing dismantling have been identified: the factors related to the patient, factors related to fracture, the factors related to the implant and factors related to the surgeon. Ablation is removal of material from the surface of an object by vaporization, chipping, or other erosive processes.
Examples of ablative materials are described below, and include spacecraft material for ascent and atmospheric reentry, ice and snow in glaciology, biological tissues in medicine and passive fire protection materials.
Ablation is removal of material from the surface of an object by vaporization, chipping, or other erosive processes. Examples of ablative materials are described below, and include spacecraft material for ascent and atmospheric reentry, ice and snow in glaciology, biological tissues in medicine and passive fire protection materials.
The problem of material ablation Material ablation is a highly debated subject, as shown by the SOFCOT teaching conference . Ablation of locking plates seems to be the most feared. Ablation of the osteosynthesis material was done 4 weeks postoperatively in the case of acroplates and 6 weeks in the case of pins.
Results. All the patients. The transverse diameter of the nostrils is modified by resecting the threshold of the alae. This is a useful complementary procedure following a Le Fort I osteotomy in which the alae naturally widen. This minimal cutaneous excision is performed under general anesthetic during ablation of the osteosynthesis material.