scholarly journals Advantages and Disadvantages of using Food Grate Stainless Steel Rods for Internal Fixation of Femoral Transverse Fractures in Rabbits (Review Study)

2020 ◽  
Vol 5 (2) ◽  
pp. 1-7
Author(s):  
Humam H Nazht

The present study designed to focus on the advantages and disadvantages of using food grate stainless steel rods (FGSR) as internal fixation methods for induced transverse fractures in the mid shift of the femoral bones in rabbits.200 cases were collected from 2007 to 2020, all these cases were employed to induced transverse fractures in the mid shift of femoral bone, 100 of them used the rods for internal fixation, 80 of the cases used the rods for fixation the natural xen- bony implantation from sheep or calves, and the others 20 cases used the rods for internal fixation of the synthetics nano bony implantation .The physical, chemical, clinical and radiographic parameters were used for evaluation, the physical and chemical analysis showed that the rods not change during sterilization, implantation or when exposed to different types of ray besides the chemical constant is about the same level measurement of the medical intramedullary pins (IMP), while the clinical observation revealed that the rods can used strongly and successfully for fracture fixation and support the animal to bear the weight, the limb used for walking gradually after 24-48 hours p. o. with some cases shown the FGSR pulled from the bone, other suffer from infection with pus formation with lateral deviation of the stifle joint or re-fracture. While the radiological finding revealed that the FGSR insert and fix the fractures fragment and the bony implantation, the pins seemed stable and fit the intramedullary canal and fracture fragments, while some cases shows that the pin not insert properly inside the femoral bone with case of multible and comminuted fractures, other case shown the FGSR pass and penetrate the stifle joint. The conclusion is, there are many advantages with minor or very little disadvantages for using the FGSR as internal fixation of the induced transverse fractures in the mid shift of the femoral bones and for natural and synthetics bony implantation in rabbits.

2019 ◽  
Vol 4 (3) ◽  
pp. 1-9
Author(s):  
Humam H Nazht

This project was designed to replace the medical stainless steel pins (MSP) which used in internal fixation of the transverse fractures femoral bone in rabbits by the food grate stainless steel rods (FGSR) 2.25 and 2.5 mm which used in the food industry. 175 adult local bree d rabbits were used from 2008 – 2019, 60 of them used to induced transverse fractures in the mid shift of femoral bones, the o thers employed to remove 1cm of diaphysis bone and replaced by either xeno - bony sheep implantation in 26 rabbits, or replaced by xeno - bony bov ine implantation in 75 rabbits , while the others14 rabbits replaced by the synthetics bony nano scaffold implantation, then all fixed by FGSR as internal fixation devices for the induced femoral fractures or fixation the implanted devices. The parameters w hich were used for evaluation were, the p hysical and general examination , laborato ry analysis for elements ratio, clinical application with radiographic and histopathological examination . The results revealed FGSR easy to find and use and handling , with lo w prize and high economic values, and the chemical elemen ts ratio the same as in the MSP , nobody rejection or complication , not changed before and within and after implantation and sterilization , give stability, and support the body weight , and the rabbits quickly used affected limb in walking and running, the FGSR visible radio graphically with good alignment of fractures bones with normal healing radiographic finding, while the histopathological examination shows normal histopathological changes during fr actures healing processing . The conclusion FGSR size 2.25 – 2.5 mm can be used strongly and successfully in internal fixation of induced transverse mid shift fractures of femoral bones in rabbits instead of the MSP.


Author(s):  
Yan Zhang ◽  
YuanBo Bi ◽  
JianPing Zhou ◽  
DaQian Sun ◽  
HongMei Li

Abstract As two important industrial manufacturing materials, titanium alloys and stainless steel have their own advantages and disadvantages in terms of physical, chemical, and mechanical properties. The field of materials manufacturing has witnessed efforts to develop technical processes that can properly combine these two alloy types, aiming to effectively use their respective advantages. The welding technology for Ti alloy and stainless steel, as a research topic with broad prospects, is comprehensively and deeply analyzed in this review. The current research progress in this field was analyzed from different process perspectives such as fusion welding, brazing, diffusion welding, friction welding, explosive welding and vacuum hot-rolling welding. The results of the review showed that the greatest challenges of fusion welding are low ductility of the material, high residual stress, high cooling rate, and the formation of numerous brittle Ti-Fe intermetallics. By using appropriate intermediate materials between these two materials, the residual stress and brittle intermetallics near the interface of the transition joint can be minimised by solving the thermal expansion mismatch, reducing the bonding temperature and pressure, and suppressing the diffusion of elements such as Ti and Fe.


2020 ◽  
Vol 44 (5) ◽  
pp. 1-12
Author(s):  
Cheol Ho Chang ◽  
Juyoung Bae ◽  
Myung Kyu Cha ◽  
Sa Ik Bang ◽  
Kyeong-Tae Lee

Abstract Background Transconjunctival fat repositioning is the gold standard for the correction of tear trough deformity. For fixation of fat pedicle, the internal fixation (IF) and externalized percutaneous suture (EPS) techniques are used, which have their own advantages and disadvantages. The present study aimed to introduce a new IF technique using a devised needle (EZ-Tcon) and to compare its outcomes with those of the conventional EPS technique. Methods Patients with primary tear trough deformity who underwent transconjunctival fat repositioning were reviewed and categorized into two cohorts according to the fixation technique: cohort 1 consisted of patients treated using the conventional EPS technique and cohort 2 consisted of those in whom the new IF technique using EZ-Tcon was adopted. Post-operative complications and aesthetic outcomes were assessed using a four-scale grading system. Results A total of 545 patients, 211 from cohort 1 and 344 from cohort 2 were evaluated with a median follow-up of 70 days. Compared to cohort 1, cohort 2 showed significantly lower rates of long-standing conspicuous scars on lower eyelid, re-operation and overall complications. In the analysis of aesthetic outcomes, 88.9 percent of cohort 2 showed grade 0 (no deformity) or I (mild deformity) post-operatively. The rate of excellent outcomes (improvements of ≥ two grades) was significantly higher in cohort 2 than in cohort 1 (p-value < 0.001). Conclusion Our technique using EZ-Tcon could possess advantages of the conventional IF and EPS techniques, showing lower complication rates and aesthetically satisfactory outcomes, and could be a safe and reliable method of transconjunctival fat repositioning. Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.


2021 ◽  
Vol 882 ◽  
pp. 11-20
Author(s):  
P. Azhagarsamy ◽  
K. Sekar ◽  
K.P. Murali

Laser-based Direct Energy Deposition (L-DED) is a very quick and freeform fabrication process. L-DED is useful to fabricate near net shape for engineering applications as well as medical applications. L-DED has been successful in making a variety of pure metals and its alloys for industrial needs. This review paper gives an overview of the research progress in various types of metallic materials like nickel alloys, Stainless Steel (SS), and Functionally Graded Materials (FGMs) fabricated by L-DED. Simultaneously, the effects of process parametric related factors also discussed. Introduction about nickel alloys, Stainless Steel, and FGMs relevant findings, and their advantages and disadvantages for these alloys are communicated. The paper shows the metallurgical, mechanical properties, and post-processing effects on L-DED fabricated nickel alloys, SS, and FGMs. This paper will be helpful to the researchers and industrialists and for those who are interested to do research in this field.


1996 ◽  
Vol 4 (3) ◽  
pp. 1-3
Author(s):  
Margaret Pugh ◽  
Robert S Richards

Numerous techniques have been described for internal fixation of displaced intra-articular fractures of the phalanges, including percutaneous pinning, microplating, interosseous wiring and tension banding techniques. One method, described by Rayhack and Bottke, is a modified tension banding method using a K-wire and a stainless steel wire. Although this technique has been found to be very useful, certain complications have led to the development of a modification of this technique.


Author(s):  
Daniel S. Janikowski ◽  
Ron Roth

A tubing manufacturer has many alternatives for manufacturing and testing stainless steel tubing for feedwater heater and condenser applications. ASTM specifications are fairly generic in nature and only specify the basic requirements needed for supplying a tube. These may not be sufficient for providing the appropriate quality tube for a critical power plant application. This paper summarizes many of the options in welding, cold working, heat treating and testing of tubing. It identifies the advantages and disadvantages of each and provides suggestions on what should be specified to ensure a reliable cost-effective tube for your application.


2006 ◽  
Vol 14 (1) ◽  
pp. 54-59
Author(s):  
T. E. Otto ◽  
M. van der Elst ◽  
A. van Lingen ◽  
P. Patka ◽  
H. J. T. M. Haarman

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