scholarly journals Biomechanical Comparison of Different External Fixation Configurations for Posttraumatic Pelvic Ring Instability

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Simon Tiziani ◽  
Georg Osterhoff ◽  
Stephen J. Ferguson ◽  
Gregor Spreiter ◽  
Max J. Scheyerer ◽  
...  
Keyword(s):  
External Fixation ◽  
Pelvic Ring ◽  
Testing Machine ◽  
Primary Treatment ◽  
Rotational Stability ◽  
Connecting Rod ◽  
Rotational Stiffness ◽  
Pelvic Ring Instability ◽  
Biomechanical Comparison ◽  
Fixation System

Background. External fixation is useful in the primary treatment of pelvic ring injuries. The present study compared the biomechanical stability of five different configurations of an external pelvic ring fixation system. Methods. Five configurations of an anterior external pelvic ring fixation system were tested using a universal testing machine. One single connecting rod was used in group “SINGLE,” two parallel connecting rods in group “DOUBLE,” two and four rods, respectively, in a tent-like configuration in groups “SINGLE TENT” and “DOUBLE TENT,” and a rhomboid-like configuration in group “RHOMBOID.” Each specimen was subjected to a total of 2000 consecutive cyclic loadings at 1 Hz lateral compression/distraction (±50 N) and torque (±0.5 Nm) loading alternating every 200 cycles. Translational and rotational stiffness were determined at 100, 300, 500, 700, and 900 cycles. Results. The “SINGLE TENT” and “RHOMBOID” configurations already failed with a preloading of 50 N compression force. The “DOUBLE” configuration had around twice the translational stability compared with the “SINGLE” and “DOUBLE TENT” configurations. Rotational stiffness observed for the “DOUBLE” and “DOUBLE TENT” configurations was about 50% higher compared to the SINGLE configuration. Conclusion. Using two parallel connecting rods provides the highest translational and rotational stability.

scholarly journals Trans-obturator cable fixation of open book pelvic injuries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Martin C. Jordan ◽  
Veronika Jäckle ◽  
Sebastian Scheidt ◽  
Fabian Gilbert ◽  
Stefanie Hölscher-Doht ◽  
...  
Keyword(s):  
Pelvic Ring ◽  
Testing Machine ◽  
Biomechanical Testing ◽  
Pubic Symphysis ◽  
Cadaver Study ◽  
Steel Cable ◽  
Reliable Technique ◽  
Peak Displacement ◽  
Total Displacement ◽  
Cable Fixation

AbstractOperative treatment of ruptured pubic symphysis by plating is often accompanied by complications. Trans-obturator cable fixation might be a more reliable technique; however, have not yet been tested for stabilization of ruptured pubic symphysis. This study compares symphyseal trans-obturator cable fixation versus plating through biomechanical testing and evaluates safety in a cadaver experiment. APC type II injuries were generated in synthetic pelvic models and subsequently separated into three different groups. The anterior pelvic ring was fixed using a four-hole steel plate in Group A, a stainless steel cable in Group B, and a titan band in Group C. Biomechanical testing was conducted by a single-leg-stance model using a material testing machine under physiological load levels. A cadaver study was carried out to analyze the trans-obturator surgical approach. Peak-to-peak displacement, total displacement, plastic deformation and stiffness revealed a tendency for higher stability for trans-obturator cable/band fixation but no statistical difference to plating was detected. The cadaver study revealed a safe zone for cable passage with sufficient distance to the obturator canal. Trans-obturator cable fixation has the potential to become an alternative for symphyseal fixation with less complications.

scholarly journals Therapy of Pelvic Ring Instability.

1991 ◽  
Vol 39 (4) ◽  
pp. 1506-1511
Author(s):  
Naoya Haramaki ◽  
Naoya Matsuyama ◽  
Masaki Miyazaki
Keyword(s):  
Pelvic Ring ◽  
Pelvic Ring Instability

scholarly journals Study of management of diaphyseal fracture shaft femur by intramedullary interlocking nail

2019 ◽  
Vol 5 (4) ◽  
pp. 588
Author(s):  
Ayush Tiwari ◽  
Sarabjeet Singh Kohli ◽  
Manish Kokne
Keyword(s):  
Primary Treatment ◽  
Rotational Stability ◽  
Diaphyseal Fracture ◽  
Flexion Deformity ◽  
Interlocking Nail ◽  
Medical College ◽  
Diaphyseal Fractures ◽  
Free Function ◽  
Femur Shaft

<p class="abstract"><strong>Background:</strong> Aim of this study was to analyze the effectiveness of interlocking nail in management of femoral diaphyseal fractures with special reference to fracture anatomy, pattern and status of stability.</p><p class="abstract"><strong>Methods:</strong> This hospital based prospective study was done in the department of Orthopedics, MGM Medical College Navi Mumbai. A total of 41 patients who were admitted in our institute was included to evaluate management of diaphyseal fracture shaft femur by intramedullary interlocking nail from July 2015 to July 2017. They were asked to follow up at 6 weeks, 3 months and 6 months.<strong></strong></p><p class="abstract"><strong>Results:</strong> Most of the fractures (70.7%) were united in 16-20 weeks while 10 (24.4%) fractures were united in 10-15 weeks and 2 (4.9%) fractures were united in 21-25 weeks. The mean time to union was 16.87±3.09 weeks. In the present study, 26 out of 41 patients had excellent results (63.4%) with full, pain free, function of the extremity. 13 patients with good result (31.8%), 9 patients had flexion deformity 1200, 3 patients had shortening 2 cm, 2 patients had shortening 1 cm. Two patients with fair result (4.8%), both had flexion deformity and none had with poor result. So overall, we had 95.2% excellent to good and 4.8% fair results.</p><p class="abstract"><strong>Conclusions:</strong> Interlocking intramedullary nailing is the most effective ad successful method of definitive primary treatment, in most types of fractures of femur shaft. It provides strong fixation, rotational stability and earliest return to functional status, as rate of healing is good with nailing.</p>

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

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
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