scholarly journals Augmentation of cerclage wire strength with a basic knot technique: A biomechanical study

2021 ◽  
Vol 12 (02) ◽  
Keyword(s):  
Biomechanical Study ◽  
Cerclage Wire

scholarly journals Augmented cerclage wire improves the fixation strength of a two-screw construct for humerus split type greater tuberosity fracture: a biomechanical study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Chao-Jui Chang ◽  
Wei-Ren Su ◽  
Kai-Lan Hsu ◽  
Chih-Kai Hong ◽  
Fa-Chuan Kuan ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Biomechanical Study ◽  
Fixation Strength ◽  
Myotendinous Junction ◽  
Steel Cable ◽  
Simple Modification ◽  
Greater Tuberosity ◽  
Cerclage Wire ◽  
Group A ◽  
Group B

Abstract Background Poor functional outcome can result from humeral greater tuberosity (GT) fracture if not treated appropriately. A two-screw construct is commonly used for the surgical treatment of such injury. However, loss of reduction is still a major concern after surgery. To improve the biomechanical strength of screw fixation in GT fractures, we made a simple modification of the two-screw construct by adding a cerclage wire to the two-screw construct. The purpose of this biomechanical study was to analyze the effect of this modification for the fixation of GT fractures. Materials and methods Sixteen fresh-frozen human cadaveric shoulders were used in this study. The fracture models were arbitrarily assigned to one of two fixation methods. Group A (n = 8) was fixed with two threaded cancellous screws with washers. In group B (n = 8), all screws were set using methods identical to group A, with the addition of a cerclage wire. Horizontal traction was applied via a stainless steel cable fixed directly to the myotendinous junction of the supraspinatus muscle. Displacement of the fracture fixation under a pulling force of 100 N/200 N and loading force to construct failure were measured. Results The mean displacements under 100 N and 200 N traction force were both significantly decreased in group B than in group A. (100 N: 1.06 ± 0.12 mm vs. 2.26 ± 0.24 mm, p < 0.001; 200 N: 2.21 ± 0.25 mm vs. 4.94 ± 0.30 mm, p < 0.001) Moreover, the failure load was significantly higher in group B compared with group A. (415 ± 52 N vs.335 ± 47 N, p = 0.01), Conclusions The current biomechanical cadaveric study demonstrated that the two-screw fixation construct augmented with a cerclage wire has higher mechanical performance than the conventional two-screw configuration for the fixation of humeral GT fractures. Trial registration Retrospectively registered.

The Effect of Volarly Angulated Distal Radius Fractures on Forearm Rotation: In Vitro Biomechanical Study

2015 ◽  
Vol 04 (S 01) ◽  
Author(s):  
Masao Nishiwaki ◽  
Mark Welsh ◽  
Louis Ferreira ◽  
James Johnson ◽  
Graham King ◽  
...  
Keyword(s):  
Distal Radius ◽  
Biomechanical Study ◽  
Distal Radius Fractures ◽  
Radius Fractures ◽  
Forearm Rotation

A biomechanical study of the dynamic behavior of the organ of Corti: effect of stimulation type on shear gain

2014 ◽  
Author(s):  
Houguang Liu ◽  
Gang Cheng ◽  
Jianhua Yang ◽  
Zhihong Cheng ◽  
Zhushi Rao ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
Organ Of Corti ◽  
Biomechanical Study

Screw Placement in Subtalar Arthrodesis: A Biomechanical Study

2009 ◽  
Vol 30 (02) ◽  
pp. 133-141 ◽  
Author(s):  
Bavornrit Chuckpaiwong ◽  
Mark E. Easley ◽  
Richard R. Glisson
Keyword(s):  
Biomechanical Study ◽  
Screw Placement ◽  
Subtalar Arthrodesis

Role of the anconeus in the stability of a lateral ligament and common extensor origin–deficient elbow: an in vitro biomechanical study

2019 ◽  
Vol 28 (5) ◽  
pp. 974-981 ◽  
Author(s):  
Armin Badre ◽  
David T. Axford ◽  
Sara Banayan ◽  
James A. Johnson ◽  
Graham J.W. King
Keyword(s):  
Biomechanical Study ◽  
Lateral Ligament ◽  
The Stability

scholarly journals The effect of four-corner fusion and proximal row carpectomy on uniplanar and multiplanar wrist motion: A biomechanical study

2021 ◽  
Vol 24 ◽  
pp. 102-110
Author(s):  
Stacy Fan ◽  
Clare Padmore ◽  
Assaf Kadar ◽  
Spencer Chambers ◽  
G. Daniel G. Langohr ◽  
...  
Keyword(s):  
Biomechanical Study ◽  
Proximal Row Carpectomy ◽  
Wrist Motion

scholarly journals Quantification of assembly forces during creation of head-neck taper junction considering soft tissue bearing: a biomechanical study

Arthroplasty ◽  
2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Toni Wendler ◽  
Torsten Prietzel ◽  
Robert Möbius ◽  
Jean-Pierre Fischer ◽  
Andreas Roth ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Work Experience ◽  
Soft Tissues ◽  
Force Sensor ◽  
Biomechanical Study ◽  
Measuring System ◽  
Wide Range ◽  
Head Neck

Abstract Background All current total hip arthroplasty (THA) systems are modular in design. Only during the operation femoral head and stem get connected by a Morse taper junction. The junction is realized by hammer blows from the surgeon. Decisive for the junction strength is the maximum force acting once in the direction of the neck axis, which is mainly influenced by the applied impulse and surrounding soft tissues. This leads to large differences in assembly forces between the surgeries. This study aimed to quantify the assembly forces of different surgeons under influence of surrounding soft tissue. Methods First, a measuring system, consisting of a prosthesis and a hammer, was developed. Both components are equipped with a piezoelectric force sensor. Initially, in situ experiments on human cadavers were carried out using this system in order to determine the actual assembly forces and to characterize the influence of human soft tissues. Afterwards, an in vitro model in the form of an artificial femur (Sawbones Europe AB, Malmo, Sweden) with implanted measuring stem embedded in gelatine was developed. The gelatine mixture was chosen in such a way that assembly forces applied to the model corresponded to those in situ. A study involving 31 surgeons was carried out on the aforementioned in vitro model, in which the assembly forces were determined. Results A model was developed, with the influence of human soft tissues being taken into account. The assembly forces measured on the in vitro model were, on average, 2037.2 N ± 724.9 N, ranging from 822.5 N to 3835.2 N. The comparison among the surgeons showed no significant differences in sex (P = 0.09), work experience (P = 0.71) and number of THAs performed per year (P = 0.69). Conclusions All measured assembly forces were below 4 kN, which is recommended in the literature. This could lead to increased corrosion following fretting in the head-neck interface. In addition, there was a very wide range of assembly forces among the surgeons, although other influencing factors such as different implant sizes or materials were not taken into account. To ensure optimal assembly force, the impaction should be standardized, e.g., by using an appropriate surgical instrument.

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