Medullary Pin Implantation
Medullary Pin Implantation - Related Videos
06:11
Culturing Primary Rat Inner Medullary Collecting Duct Cells
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Cited by 19 •
2013
Arginine-vasopressin (AVP) controls fine-tuning of body water homeostasis through facilitating water reabsorption by renal principal cells. Here, we present a protocol for the cultivation of primary rat inner medullary collecting duct cells suitable for the elucidation of molecular mechanisms underlying AVP-mediated water reabsorption.
01:21
Euler's Formula for Pin-Ended Columns
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2024
In structural engineering, the stability of columns under compressive axial loads is a critical consideration, described as buckling. A typical example involves a column PQ, which is pin-connected at both ends and subjected to a centric axial load F applied at one end, with a reaction force of F' = -F at the other end. Here, it is crucial to understand that when an applied load exceeds the critical load, buckling occurs as the system becomes unstable. To calculate the critical load, envision...
14:31
Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees
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Cited by 16 •
2009
There is a need to develop alternative prosthesis attachment due to limb loss attributed to vascular occlusive diseases and trauma. The goal of the work is to introduce an osseointegrated intelligent implant design system to increase skeletal fixation and reduce periprosthetic infection rates for patients needing osseointegrated technology.
03:26
Detrusor Underactivity Model in Rats by Conus Medullaris Transection
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Cited by 2 •
2020
We present a method for establishing a detrusor underactivity model by conus medullaris transection in rats. Detrusor underactivity was successfully stimulated in these animals. The model can be used for studying urinary tract function.
06:47
3D Organotypic Co-culture Model Supporting Medullary Thymic Epithelial Cell Proliferation, Differentiation and Promiscuous Gene Expression
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Cited by 15 •
2015
Studying medullary thymic epithelial cells in vitro has been largely unsuccessful, as current 2D culture systems do not mimic the in vivo scenario. The 3D culture system described herein - a modified skin organotypic culture model - has proven superior in recapitulating mTEC proliferation, differentiation and maintenance of promiscuous gene expression.
FAQs
The pin’s position inside the medullary canal creates internal support that spans the fracture. Because the implant lies within the marrow cavity, it helps preserve the relationship between the fractured segments while resisting bending forces. This mechanical support gives biological repair an opportunity to progress while alignment remains more controlled during healing.
Mechanical loading influences whether the fixation continues to maintain fracture alignment during healing. The pin is particularly relevant to bending resistance, while the overall loading environment may also expose limitations in rotational or axial stability. Evaluating these forces helps clinicians determine whether the implant alone is sufficient or whether supplementary fixation should be considered.
Additional fixation may be considered when a pin does not provide enough rotational or axial stability for the fracture being treated. The overview identifies combined fixation as an option when these mechanical demands exceed the support provided by the intramedullary implant. This approach allows treatment planning to account for the specific stability requirements of the fracture.
Planning must account for the bone’s anatomy and the shape and continuity of its medullary canal. The pin needs to be positioned within the marrow cavity so it can span the fracture and support alignment. These anatomical considerations help determine whether the technique is appropriate for a selected long-bone fracture and how placement should be evaluated.
The workflow begins with treatment planning based on the fracture and relevant bone anatomy. The pin is then positioned within the medullary canal so it spans the fractured region and supports alignment. Clinicians subsequently consider the stability produced, including resistance to bending, rotation, and axial forces, and decide whether another fixation method is needed.
Assessment focuses on whether the fracture remains aligned and mechanically supported while biological repair progresses. Clinicians can examine the implant’s contribution to resistance against bending and consider whether rotational or axial stability is adequate. These observations help evaluate healing progress and determine whether the selected fixation strategy is meeting the mechanical needs of the fracture.