Background and Aim: Operative treatment is often indicated in unstable pediatric diaphyseal forearm fractures. Recently minimally invasive reduction and elastic stable intramedullary nailing have been of increasing interest, instead of open reduction and internal fixation with plates. There are several disadvantages of metallic intramedullary implants, such as soft-tissue irritation and a risk of disturbing later imaging. Thus, they are generally removed in later operations. we aimed to develop a new technique to stabilize pediatric forearm fractures by the bioabsorbable intramedullary nailing.Material and Methods: we developed a new, two-stage mini-invasive surgical technique to stabilize the unstable diaphyseal fractures in children. The procedure is bioabsorbable elastic stable intramedullary nailing. ultra-high-strength bioabsorbable intramedullary nails of poly(lactide-co-glycolide) were manufactured for our purpose. The material has been widely proven to be biocompatible and stable enough for fracture treatment as screws and pins. we have used the new technique in the unstable both-bone diaphyseal forearm fractures in children between the ages of 5 and 15 years. we report the technique and our clinical experience in the series of those three cases that have been followed up for at least 12 months. The present series has been randomized for the procedure instead for titanium elastic stable intramedullary nailing, and the series represents a part of ongoing randomized trial.
If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The purpose of this paper is to study epoxy and parylene C-coated samples. These coatings are used to protect the electronic devices from harsh environments. The effect of these conformal coatings on electronics reliability is considered. Design/methodology/approach -Epoxy coating is applied using dip coating and parylene C is applied with the vapour deposition polymerisation method. Test chip used is joined using flip-chip technology and an anisotropically conductive adhesive. Reliability of the test samples is evaluated in a constant humidity test, where test conditions are 858C and 85%RH. The test lasts 4,000 h. Failure analysis is carried out by cross-sectioning failed samples and using scanning electron microscopy for closer analysis. Findings -The results show variation in the reliability of adhesive joints with different conformal coating materials. Failure analysis highlights explicit failure mechanisms. Adhesion testing is also carried out on the test samples after constant humidity testing. The results of these reliability tests indicate clearly that parylene C is a more reliable choice of conformal coating than epoxy. Originality/value -The paper shows the influence of certain conformal coatings on the reliability of adhesive flip-chip joints. In medical applications, reliability plays an important role.
The self-reinforcing and hydrolytic degradation of an amorphous poly(ester-amide) (PEA) based on lactic acid have been studied and compared with those of poly-L-lactide (PLLA). The studied PEA-rods were self-reinforced (SR) by solid-state die drawing resulting double shear strength. The hydrolytic degradation of PEA was studied during exposure to phosphate buffered saline at pH 7.4 and at 37 degrees C for 18 weeks. The degradation and mechanical properties of PEA were also followed in a self-reinforced composite structure consisting of PEA and sol-gel derived SiO(2)-fibers (SGF, 8 wt %). The hydrolytic degradation of the SR-PEA-rods with and without SG-fibers was significantly faster than that of SR-PLLA-rods. The weight average molecular weight (Mw) of PEA decreased by 90% from the initial Mw during the first 6 weeks in hydrolysis, when the Mw of the PLLA decreased by 10%.
Silica fibers and non-woven fiber textures were prepared using sol-gel method and dry spinning technique. The non-woven fiber was further hot-pressed onto one side of the meltprocessed poly(L/DL)lactide 70/30 (PLA70) membrane. The aim was to study the in vitro biodegradation (silica release) and bioactivity of the fiber composites. The in vitro bioactivity and dissolution of the fibers were studied in a simulated body fluid. To monitor the surface topography and roughness of the silica fibers, a scanning probe microscopy with a tapping mode atomic force microscopy (AFM) was used. It was shown that it is possible to prepare silica fiber composites, which are able to form calcium phosphate in vitro. The calcium phosphate formation ability could be further guided to one side of the composite membrane with the help of pure silica fibers.
In the current study three-layer membrane composites were developed and studied. Membranes were made of biodegradable polymers and bioactive SiO 2 -glass fibres based on sol-gel method and prepared with dry spinning technique. Membranes were compression moulded and further processed by biaxial orientation for malleability. Sol-gel fibres, previously found loosely attached onto the membrane, were bound on the membrane with a separate layer of polymer.
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