Ein neues Meßverfahren zur Stabilitätsbeurteilung von Fixateur-externe-Systemen — Demonstriert am Beispiel des Fixateur-externe nach Stuhler-Heise - A new test procedure to examine the stability of external fixation clamps – Demonstrated with the Stuhler-Heise external Fixation System

1981 ◽  
Vol 26 (7-8) ◽  
pp. 175-181 ◽  
Author(s):  
M. Ungethüm ◽  
W. Blömer
Keyword(s):  
External Fixation ◽  
Fixateur Externe ◽  
Test Procedure ◽  
The Stability ◽  
Fixation System

scholarly journals Effect of Ring Material and Diameter on Orthopedic Implant Stability: External Fixation in Femur Bone

2018 ◽  
Vol 7 (4.26) ◽  
pp. 190 ◽  
Author(s):  
Nur Fatin Izzati Ibrahim ◽  
Ruslizam Daud ◽  
Muhammad Khairul Ali Hassan ◽  
Noor Ali Hassan ◽  
Noor Alia Md Zain ◽  
...  
Keyword(s):  
External Fixation ◽  
Von Mises Stress ◽  
Axial Stiffness ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Ring Diameter ◽  
The Stability ◽  
Von Mises ◽  
Fixation Frame ◽  
Ring Material

Axial stiffness is the most important factor in stability. It is known that any changes in the diameter of any components of the frame will either increase or decrease the axial stiffness of the fixation. The model of implant and bone will be variety as the variables changes. Current studies states that ring stability are one of the most important factors in ensuring fractured bones to have a successful re-union. In circular external fixation, the stability of the pin-bone interaction is influenced by the stability of the fixation frame where the major component is the rings. The objective is to study the finite element analysis (FEA) of the external fixator assembled in human diaphysis under compression force with different materials of the exoskeleton which are stainless steel, titanium alloy, magnesium alloy and carbon fiber. The results obtained show the mechanical strength of each material where it will be used to compare the value of von-Mises stress, stiffness and total deformation to acquire the best suitable ring diameter and material. Based on the result, as the diameter of the ring increases, the stiffness of the ring will be decreased. 

Salah Eddin External Fixation System: A Bone Slider and Compressor

Orthopedics ◽  
1985 ◽  
Vol 8 (10) ◽  
pp. 1266-1267 ◽  
Author(s):  
Mudhaffar P Habboushe
Keyword(s):  
External Fixation ◽  
System A ◽  
Fixation System

Estimating Results of a Proposed Simple Performance Test for Hot-Mix Asphalt from Superpave Gyratory Compactor Results

2005 ◽  
Vol 1929 (1) ◽  
pp. 104-113 ◽  
Author(s):  
Ahmed F. Faheem ◽  
Hussain U. Bahia ◽  
Hossein Ajideh
Keyword(s):  
Performance Test ◽  
Test Procedure ◽  
Asphalt Mixtures ◽  
Strongly Correlated ◽  
Flow Number ◽  
Traffic Loading ◽  
Superpave Gyratory Compactor ◽  
The Stability ◽  
Work Done ◽  
Pavement Service Life

This study intended to use the Superpave® gyratory compactor (SGC) as a basis for estimating the stability of asphalt mixtures as a surrogate for proposed method for the simple performance test. Several asphalt mixtures were produced with varying aggregate sources, asphalt contents, and gradations. Every mixture was compacted with the SGC and evaluated with the repeated compression test procedure for rutting measurements recommended by NCHRP Project 9–19 and the AASHTO 2002 pavement design manual to evaluate whether the results from the SGC can be related to the rutting of mixtures. Densification curves produced by the SGC were used to determine the volumetric properties besides the calculation of the traffic densification index (TDI), which represents the densification experienced by traffic loading during pavement service life. The traffic force index (TFI) was also calculated with a special accessory added to the SGC during compaction (the pressure distributor analyzer). The TFI represents the work done by the traffic to densify the mixture. Results from the mixture rutting tests were used to estimate the flow number (FN). The FN, an important mixture property, is shown to have a strong correlation to the TFI. The TFI was also found to be strongly correlated with the TDI and gives an opportunity to estimate the mixture resistance to compaction forces with the use of its volumetric behavior. The main finding of the study is that the SGC appears to give information that can be used to characterize the stability of the mixtures. Such information could be used as an initial screening criterion to select mixtures for various traffic levels.

The SK™ external fixation system: description of components, instrumentation, and application techniques

2003 ◽  
Vol 16 (02) ◽  
pp. 76-81 ◽  
Author(s):  
D. G. Bronson ◽  
D. Ross ◽  
R. D. Welch ◽  
J. P. Toombs
Keyword(s):  
External Fixation ◽  
External Fixator ◽  
Clinical Use ◽  
System Description ◽  
Fracture Stabilization ◽  
Application Techniques ◽  
Frame Construction ◽  
Fixation System

SummaryThe SK™ external fixator was designed to overcome the problems commonly encountered with clinical use of the Kirschner-Ehmer (KE) splint. It enables the use of a range of different fixation pin diameters within a construct, improved pin centering within the bone, increased flexibility in frame construction and disassembly, and a decreased need for the use of full-pins to achieve fracture stabilization. The SK™ external fixator is available in three sizes: mini, small, and large. This report describes the components of the SK™ ESF system, the instrumentation needed to apply it, and the recommended application techniques.

Open Tibial Fractures Treated With the Ex-fi-re External Fixation System

1996 ◽  
Vol 326 ◽  
pp. 209-220 ◽  
Author(s):  
Per Helland ◽  
Asbj??rn B??e ◽  
Anders O. M??lster ◽  
Eirik Solheim ◽  
Markus Hordvik
Keyword(s):  
External Fixation ◽  
Tibial Fractures ◽  
Open Tibial Fractures ◽  
Fixation System

Pectus excavatum repair using bridge fixation system

2019 ◽  
Vol 27 (5) ◽  
pp. 374-380
Author(s):  
Vu Huu Vinh ◽  
Huynh Quang Khanh ◽  
Nguyen Hoang Binh ◽  
Nguyen Van Khoi
Keyword(s):  
Postoperative Complications ◽  
Pectus Excavatum ◽  
Fixation Method ◽  
Fixation Techniques ◽  
Pectus Bar ◽  
Skin Surgery ◽  
The Stability ◽  
Skin To Skin ◽  
Average Skin ◽  
Fixation System

Background The stability of the pectus bar is an important determinant of the success of pectus excavatum repair surgery. In practice, several different types of fixation method are in use for stabilizing pectus bars. The aim of this study was to compare the performance of the bridge fixation system with previous fixation systems for stabilizing pectus bars. Methods We performed a retrospective review of 1760 pectus excavatum repair cases conducted in the Thoracic Department of Choray Hospital and its satellite hospitals, between 2007 and 2017. We compared the results of 560 patients who had the bridge fixation system with the previous 1200 patients who had other fixation techniques. Results The bridge fixation system with 2 bars in 560 patients gave better results in terms of bar stabilization, operative time, and postoperative complications, compared to the previous 1200 patients who had other stabilization techniques. The average skin-to-skin surgery time using the bridge fixation system was 55 min. Of the 560 cases, only one patient showed trivial one bar dislocation, and one had a postoperative complication (pneumothorax). Conclusions We found the bridge fixation system to be superior not only in terms of stabilizing the bars but also for minimizing the time of surgery and postoperative complications, compared to other fixation systems. The bridge fixation system with 2 bars showed excellent results. Use of 3 bars is not necessary. One bar was used in the other fixation techniques and the results were found to be inferior compared to those using 2 bars.

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